VAR-200903-0282
Vulnerability from variot - Updated: 2023-12-18 12:22The SSLVPN feature in Cisco IOS 12.3 through 12.4 allows remote attackers to cause a denial of service (device reload or hang) via a crafted HTTPS packet. Cisco IOS is prone to multiple remote denial-of-service vulnerabilities. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Cisco Security Advisory: Cisco IOS Software WebVPN and SSLVPN Vulnerabilities
Advisory ID: cisco-sa-20090325-webvpn
http://www.cisco.com/warp/public/707/cisco-sa-20090325-webvpn.shtml
Revision 1.0
For Public Release 2009 March 25 1600 UTC (GMT)
Summary
Cisco IOS software contains two vulnerabilities within the Cisco IOS WebVPN or Cisco IOS SSLVPN feature (SSLVPN) that can be remotely exploited without authentication to cause a denial of service condition. Crafted HTTPS packet will crash device. 2. SSLVPN sessions cause a memory leak in the device.
Cisco has released free software updates that address these vulnerabilities.
There are no workarounds that mitigate these vulnerabilities.
This advisory is posted at the following link: http://www.cisco.com/warp/public/707/cisco-sa-20090325-webvpn.shtml
Note: The March 25, 2009, Cisco IOS Security Advisory bundled publication includes eight Security Advisories. Each advisory lists the releases that correct the vulnerability or vulnerabilities in the advisory. The following table lists releases that correct all Cisco IOS Software vulnerabilities that have been published in Cisco Security Advisories on March 25, 2009, or earlier.
To determine the Cisco IOS Software release that is running on a Cisco product, administrators can log in to the device and issue the "show version" command to display the system banner. The system banner confirms that the device is running Cisco IOS Software by displaying text similar to "Cisco Internetwork Operating System Software" or "Cisco IOS Software." The image name displays in parentheses, followed by "Version" and the Cisco IOS Software release name. Other Cisco devices do not have the "show version" command or may provide different output.
The following example identifies a Cisco product that is running Cisco IOS Software Release 12.3(26) with an installed image name of C2500-IS-L:
Router#show version
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-IS-L), Version 12.3(26), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by cisco Systems, Inc.
Compiled Mon 17-Mar-08 14:39 by dchih
<output truncated>
The following example shows a product that is running Cisco IOS Software release 12.4(20)T with an image name of C1841-ADVENTERPRISEK9-M:
Router#show version
Cisco IOS Software, 1841 Software (C1841-ADVENTERPRISEK9-M), Version 12.4(20)T, RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Thu 10-Jul-08 20:25 by prod_rel_team
<output truncated>
Additional information about Cisco IOS Software release naming conventions is available in "White Paper: Cisco IOS Reference Guide" at the following link: http://www.cisco.com/warp/public/620/1.html
To determine that SSLVPN is enabled on your device, log in to the device and issue the command-line interface (CLI) command "show running-config | include webvpn". If the device returns any output this means that SSLVPN is configured on the device and the device may be vulnerable. Vulnerable configurations vary depending on whether the device is supporting Cisco IOS WebVPN (introduced in Release 12.3 (14)T) or Cisco IOS SSLVPNs (introduced in Release 12.4(6)T). The following methods describe how to confirm if the device is vulnerable:
If the output from "show running-config | include webvpn" contains "webvpn enable" then the device is configured with the original Cisco IOS WebVPN. The only way to confirm the device is vulnerable is to examine the output of "show running-config" to confirm that webvpn is enabled via the command "webvpn enable" and that a "ssl trustpoint" has been configured. The following example shows a vulnerable device configured with Cisco IOS WebVPN:
webvpn enable
!
webvpn
ssl trustpoint TP-self-signed-29742012
If the output from "show running-config | include webvpn" contains "webvpn gateway " then the device is supporting the Cisco IOS SSLVPN feature. A device is vulnerable if it has the "inservice" command in at least one of the "webvpn gateway" sections. The following example shows a vulnerable device configured with Cisco IOS SSLVPN:
Router# show running | section webvpn
webvpn gateway Gateway
ip address 10.1.1.1 port 443
ssl trustpoint Gateway-TP
inservice
!
Router#
A device that supports the Cisco IOS SSLVPN is not vulnerable if it has no "webvpn gateways" configured or all the configured "webvpn gateways" contain the "no inservice" "webvpn gateway" command.
Products Confirmed Not Vulnerable +--------------------------------
The following products are not affected by this vulnerability:
- Cisco ASA 5500 Series Adaptive Security Appliances
- Cisco IOS XR Software
- Cisco IOS XE Software
No other Cisco products are currently known to be affected by these vulnerabilities.
Details
The Cisco SSLVPN feature provides remote access to enterprise sites by users from anywhere on the Internet. The SSLVPN provides users with secure access to specific enterprise applications, such as e-mail and web browsing, without requiring them to have VPN client software installed on their end-user devices.
The WebVPN Enhancements feature (Cisco IOS SSLVPN), released in Cisco IOS Release 12.4(6)T, obsoletes the commands and configurations originally put forward in Cisco IOS WebVPN. Completion of the 3-way handshake to the associated TCP port number of the SSLVPN feature is required in order for the vulnerability to be successfully exploited, however authentication is "not" required. The default TCP port number for SSLVPN is 443.
This vulnerability is documented in Cisco bug ID CSCsk62253 and Common Vulnerabilities and Exposures (CVE) identifier CVE-2009-0626 has been assigned to this vulnerability.
SSLVPN sessions cause a memory leak in the device +------------------------------------------------
A device configured for SSLVPN may leak transmission control blocks (TCBs) when processing an abnormally disconnected SSL session. Continued exploitation may result in the device depleting its memory resources and result in a crash of the device. Authentication is "not" required to exploit this vulnerability.
The memory leak can be detected by running the command "show tcp brief", like in the following example:
Router#show tcp brief
TCB Local Address Foreign Address (state)
468BBDC0 192.168.0.22.443 192.168.0.33.19794 CLOSEWAIT
482D4730 192.168.0.22.443 192.168.0.33.22092 CLOSEWAIT
482779A4 192.168.0.22.443 192.168.0.33.16978 CLOSEWAIT
4693DEBC 192.168.0.22.443 192.168.0.33.21580 CLOSEWAIT
482D3418 192.168.0.22.443 192.168.0.33.17244 CLOSEWAIT
482B8ACC 192.168.0.22.443 192.168.0.33.16564 CLOSEWAIT
46954EB0 192.168.0.22.443 192.168.0.33.19532 CLOSEWAIT
468BA9B8 192.168.0.22.443 192.168.0.33.15781 CLOSEWAIT
482908C4 192.168.0.22.443 192.168.0.33.19275 CLOSEWAIT
4829D66C 192.168.0.22.443 192.168.0.33.19314 CLOSEWAIT
468A2D94 192.168.0.22.443 192.168.0.33.14736 CLOSEWAIT
4688F590 192.168.0.22.443 192.168.0.33.18786 CLOSEWAIT
4693CBA4 192.168.0.22.443 192.168.0.33.12176 CLOSEWAIT
4829ABC4 192.168.0.22.443 192.168.0.33.39629 CLOSEWAIT
4691206C 192.168.0.22.443 192.168.0.33.17818 CLOSEWAIT
46868224 192.168.0.22.443 192.168.0.33.16774 CLOSEWAIT
4832BFAC 192.168.0.22.443 192.168.0.33.39883 CLOSEWAIT
482D10CC 192.168.0.22.443 192.168.0.33.13677 CLOSEWAIT
4829B120 192.168.0.22.443 192.168.0.33.20870 CLOSEWAIT
482862FC 192.168.0.22.443 192.168.0.33.17035 CLOSEWAIT
482EC13C 192.168.0.22.443 192.168.0.33.16053 CLOSEWAIT
482901D8 192.168.0.22.443 192.168.0.33.16200 CLOSEWAIT
In the output above, those Transmission Control Blocks (TCBs) in the state CLOSEWAIT will not go away and represent memory leaks. Please note that only TCP connections with a local TCP port of 443 (the well-known port for HTTPS) are relevant.
This vulnerability is documented in Cisco bug ID CSCsw24700 and Common Vulnerabilities and Exposures (CVE) identifier CVE-2009-0628 has been assigned to this vulnerability.
Vulnerability Scoring Details
Cisco has provided scores for the vulnerabilities in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding CVSS at
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at
http://intellishield.cisco.com/security/alertmanager/cvss
CSCsk62253 - Crafted HTTPS packet will crash device.
CVSS Base Score - 7.8
Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - None Integrity Impact - None Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed
CSCsw24700 - SSLVPN sessions cause a memory leak in the device.
CVSS Base Score - 7.8
Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - None Integrity Impact - None Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed
Impact
Successful exploitation of any of the two vulnerabilities may result in the device crashing, not accepting any new SSLVPN sessions or a memory leak. Repeated exploitation may result in an extended denial of service (DoS) condition.
Software Versions and Fixes
When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution.
In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance.
Each row of the Cisco IOS software table (below) names a Cisco IOS release train. If a given release train is vulnerable, then the earliest possible releases that contain the fix (along with the anticipated date of availability for each, if applicable) are listed in the "First Fixed Release" column of the table. The "Recommended Release" column indicates the releases which have fixes for all the published vulnerabilities at the time of this Advisory. A device running a release in the given train that is earlier than the release in a specific column (less than the First Fixed Release) is known to be vulnerable. Cisco recommends upgrading to a release equal to or later than the release in the "Recommended Releases" column of the table.
+-------------------------------------------------------------------+ | Major | Availability of Repaired Releases | | Release | | |------------+------------------------------------------------------| | Affected | | Recommended | | 12.0-Based | First Fixed Release | Release | | Releases | | | |-------------------------------------------------------------------| | There are no affected 12.0 based releases | |-------------------------------------------------------------------| | Affected | | Recommended | | 12.1-Based | First Fixed Release | Release | | Releases | | | |-------------------------------------------------------------------| | There are no affected 12.1 based releases | |-------------------------------------------------------------------| | Affected | | Recommended | | 12.2-Based | First Fixed Release | Release | | Releases | | | |-------------------------------------------------------------------| | There are no affected 12.2 based releases | |-------------------------------------------------------------------| | Affected | | Recommended | | 12.3-Based | First Fixed Release | Release | | Releases | | | |------------+--------------------------------------+---------------| | 12.3 | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3B | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3BC | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3BW | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3EU | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JEA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JEB | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JEC | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JK | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JL | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JX | Not Vulnerable | | |------------+--------------------------------------+---------------| | | | 12.4(22)T1 | | | | | | 12.3T | Vulnerable; first fixed in 12.4T | 12.4(15)T9; | | | | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | 12.3TPC | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3VA | Vulnerable; contact TAC | | |------------+--------------------------------------+---------------| | 12.3XA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XB | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XC | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XD | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XE | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XF | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XG | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XI | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XJ | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XK | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XL | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XQ | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XR | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XS | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XU | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XW | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XX | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XY | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XZ | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YD | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YF | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YG | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YH | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YI | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YJ | Not Vulnerable | | |------------+--------------------------------------+---------------| | | Releases prior to 12.3(11)YK3 are | 12.4(22)T1 | | | vulnerable, release 12.3(11)YK3 and | | | 12.3YK | later are not vulnerable; first | 12.4(15)T9; | | | fixed in 12.4T | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | 12.3YM | Not Vulnerable | | |------------+--------------------------------------+---------------| | | | 12.4(22)T1 | | | | | | 12.3YQ | Vulnerable; first fixed in 12.4T | 12.4(15)T9; | | | | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | | | 12.4(22)T1 | | | | | | 12.3YS | Vulnerable; first fixed in 12.4T | 12.4(15)T9; | | | | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | | | 12.4(22)T1 | | | | | | 12.3YT | Vulnerable; first fixed in 12.4T | 12.4(15)T9; | | | | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | | | 12.4(22)T1 | | | | | | 12.3YU | Vulnerable; first fixed in 12.4T | 12.4(15)T9; | | | | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | 12.3YX | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YZ | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3ZA | Not Vulnerable | | |------------+--------------------------------------+---------------| | Affected | | Recommended | | 12.4-Based | First Fixed Release | Release | | Releases | | | |------------+--------------------------------------+---------------| | | | 12.4(18e) | | | 12.4(18e) | | | 12.4 | | 12.4(23a); | | | 12.4(23a); Available on 30-APR-2009 | Available on | | | | 30-APR-2009 | |------------+--------------------------------------+---------------| | 12.4JA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JDA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JK | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JL | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JMA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JMB | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JX | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4MD | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4MR | 12.4(16)MR | 12.4(19)MR2 | |------------+--------------------------------------+---------------| | 12.4SW | Not Vulnerable | | |------------+--------------------------------------+---------------| | | 12.4(15)T7 | 12.4(22)T1 | | | | | | 12.4T | 12.4(20)T | 12.4(15)T9; | | | | Available on | | | 12.4(15)T9; Available on 29-APR-2009 | 29-APR-2009 | |------------+--------------------------------------+---------------| | | | 12.4(22)T1 | | | | | | 12.4XA | Vulnerable; first fixed in 12.4T | 12.4(15)T9; | | | | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | | | 12.4(22)T1 | | | | | | 12.4XB | Vulnerable; first fixed in 12.4T | 12.4(15)T9; | | | | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | | | 12.4(22)T1 | | | | | | 12.4XC | Vulnerable; first fixed in 12.4T | 12.4(15)T9; | | | | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | | 12.4(4)XD12; Available on | 12.4(4)XD12; | | 12.4XD | 27-MAR-2009 | Available on | | | | 27-MAR-2009 | |------------+--------------------------------------+---------------| | | | 12.4(22)T1 | | | | | | 12.4XE | Vulnerable; first fixed in 12.4T | 12.4(15)T9; | | | | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | 12.4XF | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XG | Not Vulnerable | | |------------+--------------------------------------+---------------| | | | 12.4(22)T1 | | | | | | 12.4XJ | Vulnerable; first fixed in 12.4T | 12.4(15)T9; | | | | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | 12.4XK | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XL | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XM | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XN | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XP | Vulnerable; contact TAC | | |------------+--------------------------------------+---------------| | 12.4XQ | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XR | Not Vulnerable | | |------------+--------------------------------------+---------------| | | | 12.4(22)T1 | | | | | | 12.4XT | Vulnerable; first fixed in 12.4T | 12.4(15)T9; | | | | Available on | | | | 29-APR-2009 | |------------+--------------------------------------+---------------| | 12.4XV | Vulnerable; contact TAC | | |------------+--------------------------------------+---------------| | 12.4XW | 12.4(11)XW10 | 12.4(11)XW10 | |------------+--------------------------------------+---------------| | 12.4XY | 12.4(15)XY4 | 12.4(22)T1 | |------------+--------------------------------------+---------------| | 12.4XZ | 12.4(15)XZ1 | 12.4(15)XZ2 | |------------+--------------------------------------+---------------| | 12.4YA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4YB | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4YD | Not Vulnerable | | +-------------------------------------------------------------------+
Workarounds
There are no workarounds for the vulnerabilities described in this advisory.
Obtaining Fixed Software
Cisco has released free software updates that address these vulnerabilities. Prior to deploying software, customers should consult their maintenance provider or check the software for feature set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or otherwise using such software upgrades, customers agree to be bound by the terms of Cisco's software license terms found at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html, or as otherwise set forth at Cisco.com Downloads at http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for software upgrades.
Customers with Service Contracts +-------------------------------
Customers with contracts should obtain upgraded software through their regular update channels. For most customers, this means that upgrades should be obtained through the Software Center on Cisco's worldwide website at http://www.cisco.com
Customers using Third Party Support Organizations +------------------------------------------------
Customers whose Cisco products are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers should contact that support organization for guidance and assistance with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Due to the variety of affected products and releases, customers should consult with their service provider or support organization to ensure any applied workaround or fix is the most appropriate for use in the intended network before it is deployed.
Customers without Service Contracts +----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco service contract, and customers who purchase through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should acquire upgrades by contacting the Cisco Technical Assistance Center (TAC). TAC contacts are as follows.
- +1 800 553 2447 (toll free from within North America)
- +1 408 526 7209 (toll call from anywhere in the world)
- e-mail: tac@cisco.com
Customers should have their product serial number available and be prepared to give the URL of this notice as evidence of entitlement to a free upgrade. Free upgrades for non-contract customers must be requested through the TAC.
Refer to http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml for additional TAC contact information, including localized telephone numbers, and instructions and e-mail addresses for use in various languages.
Exploitation and Public Announcements
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities described in this advisory.
These vulnerabilities were discovered when handling customer support calls.
Status of this Notice: FINAL
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.
Distribution
This advisory is posted on Cisco's worldwide website at :
http://www.cisco.com/warp/public/707/cisco-sa-20090325-webvpn.shtml
In addition to worldwide web posting, a text version of this notice is clear-signed with the Cisco PSIRT PGP key and is posted to the following e-mail and Usenet news recipients.
- cust-security-announce@cisco.com
- first-teams@first.org
- bugtraq@securityfocus.com
- vulnwatch@vulnwatch.org
- cisco@spot.colorado.edu
- cisco-nsp@puck.nether.net
- full-disclosure@lists.grok.org.uk
- comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates.
Revision History
+---------------------------------------+ | Revision | | Initial | | 1.0 | 2009-March-25 | public | | | | release. | +---------------------------------------+
Cisco Security Procedures
Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/go/psirt -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (Darwin)
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Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/ . ----------------------------------------------------------------------
Secunia is pleased to announce the release of the annual Secunia report for 2008.
1) An unspecified error in the Cisco Tunneling Control Protocol (cTCP) feature can be exploited to exhaust all memory and may crash the cTCP server via a series of specially crafted TCP packets.
2) An unspecified error exists in the handling of IP sockets, which can be exploited to prevent accepting new connections or sessions, exhaust memory, cause high CPU load, or to cause a reload of an affected device.
4) An unspecified error in the Cisco IOS SCP server (disabled by default) can be exploited to retrieve or write to arbitrary files on the device's file system, regardless of the CLI view configuration.
Successful exploitation of this vulnerability requires valid user access with an attached command-line interface (CLI) view.
5) An unspecified error in the implementation of the Session Initiation Protocol (SIP) can be exploited to reload an affected device via a specially crafted SIP message.
This vulnerability is reported in Cisco IOS with SIP voice services enabled, and which process SIP messages as part of configured VoIP functionality.
6) An unspecified error in the handling of TCP packets can be exploited to reload an affected device via a sequence of specially crafted TCP packets.
This vulnerability is reported in Cisco IOS with the following features enabled: * Airline Product Set (ALPS) * Serial Tunnel Code (STUN) and Block Serial Tunnel Code (BSTUN) * Native Client Interface Architecture support (NCIA) * Data-link switching (DLSw) * Remote Source-Route Bridging (RSRB) * Point to Point Tunneling Protocol (PPTP) * X.25 for Record Boundary Preservation (RBP) * X.25 over TCP (XOT) * X.25 Routing
7) An unspecified error in the handling of UDP packets can be exploited to block an interface of an affected device by sending a specially crafted UDP packets.
SOLUTION: Please see the following vendor advisory for fixed versions. http://www.cisco.com/warp/public/707/cisco-sa-20090325-bundle.shtml
PROVIDED AND/OR DISCOVERED BY: 1, 3, 5 - 9) Reported by the vendor. 2) The vendor also credits Jens Link. 4) The vendor credits Kevin Graham.
ORIGINAL ADVISORY: Cisco: http://www.cisco.com/warp/public/707/cisco-sa-20090325-ctcp.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090325-ip.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090325-mobileip.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090325-scp.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090325-sip.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090325-tcp.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090325-udp.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090325-webvpn.shtml
OTHER REFERENCES: http://www.cisco.com/warp/public/707/cisco-amb-20090325-sip-and-udp.shtml http://www.cisco.com/warp/public/707/cisco-amb-20090325-ctcp.shtml
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"data": "The SSLVPN feature in Cisco IOS 12.3 through 12.4 allows remote attackers to cause a denial of service (device reload or hang) via a crafted HTTPS packet. Cisco IOS is prone to multiple remote denial-of-service vulnerabilities. -----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA1\n\nCisco Security Advisory: Cisco IOS Software WebVPN and SSLVPN\nVulnerabilities\n\nAdvisory ID: cisco-sa-20090325-webvpn\n\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-webvpn.shtml\n\nRevision 1.0\n\nFor Public Release 2009 March 25 1600 UTC (GMT)\n\n- ---------------------------------------------------------------------\n\nSummary\n=======\n\nCisco IOS software contains two vulnerabilities within the Cisco IOS\nWebVPN or Cisco IOS SSLVPN feature (SSLVPN) that can be remotely\nexploited without authentication to cause a denial of service\ncondition. Crafted HTTPS packet will crash device. \n 2. SSLVPN sessions cause a memory leak in the device. \n\nCisco has released free software updates that address these\nvulnerabilities. \n\nThere are no workarounds that mitigate these vulnerabilities. \n\nThis advisory is posted at the following link: \nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-webvpn.shtml\n\nNote: The March 25, 2009, Cisco IOS Security Advisory bundled\npublication includes eight Security Advisories. Each advisory lists\nthe releases that correct the vulnerability or vulnerabilities in the\nadvisory. The following table lists releases that correct all Cisco\nIOS Software vulnerabilities that have been published in Cisco\nSecurity Advisories on March 25, 2009, or earlier. \n\nTo determine the Cisco IOS Software release that is running on a\nCisco product, administrators can log in to the device and issue the\n\"show version\" command to display the system banner. The system\nbanner confirms that the device is running Cisco IOS Software by\ndisplaying text similar to \"Cisco Internetwork Operating System\nSoftware\" or \"Cisco IOS Software.\" The image name displays in\nparentheses, followed by \"Version\" and the Cisco IOS Software release\nname. Other Cisco devices do not have the \"show version\" command or\nmay provide different output. \n\nThe following example identifies a Cisco product that is running\nCisco IOS Software Release 12.3(26) with an installed image name of\nC2500-IS-L:\n\n Router#show version\n Cisco Internetwork Operating System Software\n IOS (tm) 2500 Software (C2500-IS-L), Version 12.3(26), RELEASE SOFTWARE (fc2)\n Technical Support: http://www.cisco.com/techsupport\n Copyright (c) 1986-2008 by cisco Systems, Inc. \n Compiled Mon 17-Mar-08 14:39 by dchih\n\n \u003coutput truncated\u003e\n\nThe following example shows a product that is running Cisco IOS\nSoftware release 12.4(20)T with an image name of\nC1841-ADVENTERPRISEK9-M:\n\n Router#show version\n Cisco IOS Software, 1841 Software (C1841-ADVENTERPRISEK9-M), Version 12.4(20)T, RELEASE SOFTWARE (fc3)\n Technical Support: http://www.cisco.com/techsupport\n Copyright (c) 1986-2008 by Cisco Systems, Inc. \n Compiled Thu 10-Jul-08 20:25 by prod_rel_team\n\n \u003coutput truncated\u003e\n\nAdditional information about Cisco IOS Software release naming\nconventions is available in \"White Paper: Cisco IOS Reference Guide\"\nat the following link: http://www.cisco.com/warp/public/620/1.html\n\nTo determine that SSLVPN is enabled on your device, log in to the\ndevice and issue the command-line interface (CLI) command \"show\nrunning-config | include webvpn\". If the device returns any output\nthis means that SSLVPN is configured on the device and the device may\nbe vulnerable. Vulnerable configurations vary depending on whether\nthe device is supporting Cisco IOS WebVPN (introduced in Release 12.3\n(14)T) or Cisco IOS SSLVPNs (introduced in Release 12.4(6)T). The\nfollowing methods describe how to confirm if the device is\nvulnerable:\n\nIf the output from \"show running-config | include webvpn\" contains\n\"webvpn enable\" then the device is configured with the original Cisco\nIOS WebVPN. The only way to confirm the device is vulnerable is to\nexamine the output of \"show running-config\" to confirm that webvpn is\nenabled via the command \"webvpn enable\" and that a \"ssl trustpoint\"\nhas been configured. The following example shows a vulnerable device\nconfigured with Cisco IOS WebVPN:\n\n webvpn enable\n !\n webvpn\n ssl trustpoint TP-self-signed-29742012\n\nIf the output from \"show running-config | include webvpn\" contains\n\"webvpn gateway \u003cword\u003e\" then the device is supporting the Cisco IOS\nSSLVPN feature. A device is vulnerable if it has the \"inservice\"\ncommand in at least one of the \"webvpn gateway\" sections. The\nfollowing example shows a vulnerable device configured with Cisco IOS\nSSLVPN:\n\n Router# show running | section webvpn\n webvpn gateway Gateway\n ip address 10.1.1.1 port 443\n ssl trustpoint Gateway-TP\n inservice\n !\n Router#\n\nA device that supports the Cisco IOS SSLVPN is not vulnerable if it\nhas no \"webvpn gateways\" configured or all the configured \"webvpn\ngateways\" contain the \"no inservice\" \"webvpn gateway\" command. \n\nProducts Confirmed Not Vulnerable\n+--------------------------------\n\nThe following products are not affected by this vulnerability:\n\n * Cisco ASA 5500 Series Adaptive Security Appliances\n * Cisco IOS XR Software\n * Cisco IOS XE Software\n\nNo other Cisco products are currently known to be affected by these\nvulnerabilities. \n\nDetails\n=======\n\nThe Cisco SSLVPN feature provides remote access to enterprise sites\nby users from anywhere on the Internet. The SSLVPN provides users\nwith secure access to specific enterprise applications, such as\ne-mail and web browsing, without requiring them to have VPN client\nsoftware installed on their end-user devices. \n\nThe WebVPN Enhancements feature (Cisco IOS SSLVPN), released in Cisco\nIOS Release 12.4(6)T, obsoletes the commands and configurations\noriginally put forward in Cisco IOS WebVPN. Completion of the 3-way handshake to\nthe associated TCP port number of the SSLVPN feature is required in\norder for the vulnerability to be successfully exploited, however\nauthentication is \"not\" required. The default TCP port number for\nSSLVPN is 443. \n\nThis vulnerability is documented in Cisco bug ID CSCsk62253 \nand Common Vulnerabilities and Exposures (CVE) identifier \nCVE-2009-0626 has been assigned to this vulnerability. \n\nSSLVPN sessions cause a memory leak in the device\n+------------------------------------------------\n\nA device configured for SSLVPN may leak transmission control blocks\n(TCBs) when processing an abnormally disconnected SSL session. \nContinued exploitation may result in the device depleting its memory\nresources and result in a crash of the device. Authentication is\n\"not\" required to exploit this vulnerability. \n\nThe memory leak can be detected by running the command \"show tcp\nbrief\", like in the following example:\n\n Router#show tcp brief\n TCB Local Address Foreign Address (state)\n 468BBDC0 192.168.0.22.443 192.168.0.33.19794 CLOSEWAIT\n 482D4730 192.168.0.22.443 192.168.0.33.22092 CLOSEWAIT\n 482779A4 192.168.0.22.443 192.168.0.33.16978 CLOSEWAIT\n 4693DEBC 192.168.0.22.443 192.168.0.33.21580 CLOSEWAIT\n 482D3418 192.168.0.22.443 192.168.0.33.17244 CLOSEWAIT\n 482B8ACC 192.168.0.22.443 192.168.0.33.16564 CLOSEWAIT\n 46954EB0 192.168.0.22.443 192.168.0.33.19532 CLOSEWAIT\n 468BA9B8 192.168.0.22.443 192.168.0.33.15781 CLOSEWAIT\n 482908C4 192.168.0.22.443 192.168.0.33.19275 CLOSEWAIT\n 4829D66C 192.168.0.22.443 192.168.0.33.19314 CLOSEWAIT\n 468A2D94 192.168.0.22.443 192.168.0.33.14736 CLOSEWAIT\n 4688F590 192.168.0.22.443 192.168.0.33.18786 CLOSEWAIT\n 4693CBA4 192.168.0.22.443 192.168.0.33.12176 CLOSEWAIT\n 4829ABC4 192.168.0.22.443 192.168.0.33.39629 CLOSEWAIT\n 4691206C 192.168.0.22.443 192.168.0.33.17818 CLOSEWAIT\n 46868224 192.168.0.22.443 192.168.0.33.16774 CLOSEWAIT\n 4832BFAC 192.168.0.22.443 192.168.0.33.39883 CLOSEWAIT\n 482D10CC 192.168.0.22.443 192.168.0.33.13677 CLOSEWAIT\n 4829B120 192.168.0.22.443 192.168.0.33.20870 CLOSEWAIT\n 482862FC 192.168.0.22.443 192.168.0.33.17035 CLOSEWAIT\n 482EC13C 192.168.0.22.443 192.168.0.33.16053 CLOSEWAIT\n 482901D8 192.168.0.22.443 192.168.0.33.16200 CLOSEWAIT\n\nIn the output above, those Transmission Control Blocks (TCBs) in the\nstate CLOSEWAIT will not go away and represent memory leaks. Please\nnote that only TCP connections with a local TCP port of 443 (the\nwell-known port for HTTPS) are relevant. \n\nThis vulnerability is documented in Cisco bug ID CSCsw24700 \nand Common Vulnerabilities and Exposures (CVE) identifier \nCVE-2009-0628 has been assigned to this vulnerability. \n\nVulnerability Scoring Details\n=============================\n\nCisco has provided scores for the vulnerabilities in this advisory\nbased on the Common Vulnerability Scoring System (CVSS). The CVSS\nscoring in this Security Advisory is done in accordance with CVSS\nversion 2.0. \n\nCVSS is a standards-based scoring method that conveys vulnerability\nseverity and helps determine urgency and priority of response. \n\nCisco has provided a base and temporal score. Customers can then\ncompute environmental scores to assist in determining the impact of\nthe vulnerability in individual networks. \n\nCisco has provided an FAQ to answer additional questions regarding\nCVSS at\n\nhttp://www.cisco.com/web/about/security/intelligence/cvss-qandas.html\n\nCisco has also provided a CVSS calculator to help compute the\nenvironmental impact for individual networks at\n\nhttp://intellishield.cisco.com/security/alertmanager/cvss \n\nCSCsk62253 - Crafted HTTPS packet will crash device. \n\nCVSS Base Score - 7.8\n\n Access Vector - Network\n Access Complexity - Low\n Authentication - None\n Confidentiality Impact - None\n Integrity Impact - None\n Availability Impact - Complete\n\nCVSS Temporal Score - 6.4\n\n Exploitability - Functional\n Remediation Level - Official-Fix\n Report Confidence - Confirmed\n\n\nCSCsw24700 - SSLVPN sessions cause a memory leak in the device. \n\nCVSS Base Score - 7.8\n\n Access Vector - Network\n Access Complexity - Low\n Authentication - None\n Confidentiality Impact - None\n Integrity Impact - None\n Availability Impact - Complete\n\nCVSS Temporal Score - 6.4\n\n Exploitability\t - Functional\n Remediation Level - Official-Fix\n Report Confidence - Confirmed\n\nImpact\n======\n\nSuccessful exploitation of any of the two vulnerabilities may result\nin the device crashing, not accepting any new SSLVPN sessions or a\nmemory leak. Repeated exploitation may result in an extended denial\nof service (DoS) condition. \n\nSoftware Versions and Fixes\n===========================\n\nWhen considering software upgrades, also consult \nhttp://www.cisco.com/go/psirt and any subsequent advisories to \ndetermine exposure and a complete upgrade solution. \n\nIn all cases, customers should exercise caution to be certain the\ndevices to be upgraded contain sufficient memory and that current\nhardware and software configurations will continue to be supported\nproperly by the new release. If the information is not clear, contact\nthe Cisco Technical Assistance Center (TAC) or your contracted\nmaintenance provider for assistance. \n\nEach row of the Cisco IOS software table (below) names a Cisco IOS\nrelease train. If a given release train is vulnerable, then the\nearliest possible releases that contain the fix (along with the\nanticipated date of availability for each, if applicable) are listed\nin the \"First Fixed Release\" column of the table. The \"Recommended\nRelease\" column indicates the releases which have fixes for all the\npublished vulnerabilities at the time of this Advisory. A device\nrunning a release in the given train that is earlier than the release\nin a specific column (less than the First Fixed Release) is known to\nbe vulnerable. Cisco recommends upgrading to a release equal to or\nlater than the release in the \"Recommended Releases\" column of the\ntable. \n\n+-------------------------------------------------------------------+\n| Major | Availability of Repaired Releases |\n| Release | |\n|------------+------------------------------------------------------|\n| Affected | | Recommended |\n| 12.0-Based | First Fixed Release | Release |\n| Releases | | |\n|-------------------------------------------------------------------|\n| There are no affected 12.0 based releases |\n|-------------------------------------------------------------------|\n| Affected | | Recommended |\n| 12.1-Based | First Fixed Release | Release |\n| Releases | | |\n|-------------------------------------------------------------------|\n| There are no affected 12.1 based releases |\n|-------------------------------------------------------------------|\n| Affected | | Recommended |\n| 12.2-Based | First Fixed Release | Release |\n| Releases | | |\n|-------------------------------------------------------------------|\n| There are no affected 12.2 based releases |\n|-------------------------------------------------------------------|\n| Affected | | Recommended |\n| 12.3-Based | First Fixed Release | Release |\n| Releases | | |\n|------------+--------------------------------------+---------------|\n| 12.3 | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3B | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3BC | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3BW | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3EU | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JEA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JEB | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JEC | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JK | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JL | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JX | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | | 12.4(22)T1 |\n| | | |\n| 12.3T | Vulnerable; first fixed in 12.4T | 12.4(15)T9; |\n| | | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| 12.3TPC | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3VA | Vulnerable; contact TAC | |\n|------------+--------------------------------------+---------------|\n| 12.3XA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XB | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XC | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XD | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XE | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XF | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XG | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XI | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XJ | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XK | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XL | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XQ | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XR | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XS | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XU | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XW | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XX | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XY | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XZ | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YD | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YF | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YG | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YH | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YI | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YJ | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | Releases prior to 12.3(11)YK3 are | 12.4(22)T1 |\n| | vulnerable, release 12.3(11)YK3 and | |\n| 12.3YK | later are not vulnerable; first | 12.4(15)T9; |\n| | fixed in 12.4T | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| 12.3YM | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | | 12.4(22)T1 |\n| | | |\n| 12.3YQ | Vulnerable; first fixed in 12.4T | 12.4(15)T9; |\n| | | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| | | 12.4(22)T1 |\n| | | |\n| 12.3YS | Vulnerable; first fixed in 12.4T | 12.4(15)T9; |\n| | | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| | | 12.4(22)T1 |\n| | | |\n| 12.3YT | Vulnerable; first fixed in 12.4T | 12.4(15)T9; |\n| | | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| | | 12.4(22)T1 |\n| | | |\n| 12.3YU | Vulnerable; first fixed in 12.4T | 12.4(15)T9; |\n| | | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| 12.3YX | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YZ | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3ZA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| Affected | | Recommended |\n| 12.4-Based | First Fixed Release | Release |\n| Releases | | |\n|------------+--------------------------------------+---------------|\n| | | 12.4(18e) |\n| | 12.4(18e) | |\n| 12.4 | | 12.4(23a); |\n| | 12.4(23a); Available on 30-APR-2009 | Available on |\n| | | 30-APR-2009 |\n|------------+--------------------------------------+---------------|\n| 12.4JA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JDA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JK | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JL | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JMA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JMB | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JX | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4MD | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4MR | 12.4(16)MR | 12.4(19)MR2 |\n|------------+--------------------------------------+---------------|\n| 12.4SW | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | 12.4(15)T7 | 12.4(22)T1 |\n| | | |\n| 12.4T | 12.4(20)T | 12.4(15)T9; |\n| | | Available on |\n| | 12.4(15)T9; Available on 29-APR-2009 | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| | | 12.4(22)T1 |\n| | | |\n| 12.4XA | Vulnerable; first fixed in 12.4T | 12.4(15)T9; |\n| | | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| | | 12.4(22)T1 |\n| | | |\n| 12.4XB | Vulnerable; first fixed in 12.4T | 12.4(15)T9; |\n| | | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| | | 12.4(22)T1 |\n| | | |\n| 12.4XC | Vulnerable; first fixed in 12.4T | 12.4(15)T9; |\n| | | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| | 12.4(4)XD12; Available on | 12.4(4)XD12; |\n| 12.4XD | 27-MAR-2009 | Available on |\n| | | 27-MAR-2009 |\n|------------+--------------------------------------+---------------|\n| | | 12.4(22)T1 |\n| | | |\n| 12.4XE | Vulnerable; first fixed in 12.4T | 12.4(15)T9; |\n| | | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| 12.4XF | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XG | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | | 12.4(22)T1 |\n| | | |\n| 12.4XJ | Vulnerable; first fixed in 12.4T | 12.4(15)T9; |\n| | | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| 12.4XK | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XL | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XM | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XN | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XP | Vulnerable; contact TAC | |\n|------------+--------------------------------------+---------------|\n| 12.4XQ | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XR | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | | 12.4(22)T1 |\n| | | |\n| 12.4XT | Vulnerable; first fixed in 12.4T | 12.4(15)T9; |\n| | | Available on |\n| | | 29-APR-2009 |\n|------------+--------------------------------------+---------------|\n| 12.4XV | Vulnerable; contact TAC | |\n|------------+--------------------------------------+---------------|\n| 12.4XW | 12.4(11)XW10 | 12.4(11)XW10 |\n|------------+--------------------------------------+---------------|\n| 12.4XY | 12.4(15)XY4 | 12.4(22)T1 |\n|------------+--------------------------------------+---------------|\n| 12.4XZ | 12.4(15)XZ1 | 12.4(15)XZ2 |\n|------------+--------------------------------------+---------------|\n| 12.4YA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4YB | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4YD | Not Vulnerable | |\n+-------------------------------------------------------------------+\n\nWorkarounds\n===========\n\nThere are no workarounds for the vulnerabilities described in this\nadvisory. \n\nObtaining Fixed Software\n========================\n\nCisco has released free software updates that address these\nvulnerabilities. Prior to deploying software, customers should\nconsult their maintenance provider or check the software for feature\nset compatibility and known issues specific to their environment. \n\nCustomers may only install and expect support for the feature sets\nthey have purchased. By installing, downloading, accessing or\notherwise using such software upgrades, customers agree to be bound\nby the terms of Cisco\u0027s software license terms found at \nhttp://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html,\nor as otherwise set forth at Cisco.com Downloads at \nhttp://www.cisco.com/public/sw-center/sw-usingswc.shtml\n\nDo not contact psirt@cisco.com or security-alert@cisco.com for\nsoftware upgrades. \n\nCustomers with Service Contracts\n+-------------------------------\n\nCustomers with contracts should obtain upgraded software through\ntheir regular update channels. For most customers, this means that\nupgrades should be obtained through the Software Center on Cisco\u0027s\nworldwide website at http://www.cisco.com\n\nCustomers using Third Party Support Organizations\n+------------------------------------------------\n\nCustomers whose Cisco products are provided or maintained through\nprior or existing agreements with third-party support organizations,\nsuch as Cisco Partners, authorized resellers, or service providers\nshould contact that support organization for guidance and assistance\nwith the appropriate course of action in regards to this advisory. \n\nThe effectiveness of any workaround or fix is dependent on specific\ncustomer situations, such as product mix, network topology, traffic\nbehavior, and organizational mission. Due to the variety of affected\nproducts and releases, customers should consult with their service\nprovider or support organization to ensure any applied workaround or\nfix is the most appropriate for use in the intended network before it\nis deployed. \n\nCustomers without Service Contracts\n+----------------------------------\n\nCustomers who purchase direct from Cisco but do not hold a Cisco\nservice contract, and customers who purchase through third-party\nvendors but are unsuccessful in obtaining fixed software through\ntheir point of sale should acquire upgrades by contacting the Cisco\nTechnical Assistance Center (TAC). TAC contacts are as follows. \n\n * +1 800 553 2447 (toll free from within North America)\n * +1 408 526 7209 (toll call from anywhere in the world)\n * e-mail: tac@cisco.com\n\nCustomers should have their product serial number available and be\nprepared to give the URL of this notice as evidence of entitlement to\na free upgrade. Free upgrades for non-contract customers must be\nrequested through the TAC. \n\nRefer to http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml\nfor additional TAC contact information, including localized telephone\nnumbers, and instructions and e-mail addresses for use in various\nlanguages. \n\nExploitation and Public Announcements\n=====================================\n\nThe Cisco PSIRT is not aware of any public announcements or malicious\nuse of the vulnerabilities described in this advisory. \n\nThese vulnerabilities were discovered when handling customer support\ncalls. \n\nStatus of this Notice: FINAL\n============================\n\nTHIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS AND DOES NOT IMPLY ANY\nKIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF\nMERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE\nINFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS\nAT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS\nDOCUMENT AT ANY TIME. \n\nA stand-alone copy or Paraphrase of the text of this document that\nomits the distribution URL in the following section is an\nuncontrolled copy, and may lack important information or contain\nfactual errors. \n\nDistribution\n============\n\nThis advisory is posted on Cisco\u0027s worldwide website at :\n\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-webvpn.shtml\n\nIn addition to worldwide web posting, a text version of this notice\nis clear-signed with the Cisco PSIRT PGP key and is posted to the\nfollowing e-mail and Usenet news recipients. \n\n * cust-security-announce@cisco.com\n * first-teams@first.org\n * bugtraq@securityfocus.com\n * vulnwatch@vulnwatch.org\n * cisco@spot.colorado.edu\n * cisco-nsp@puck.nether.net\n * full-disclosure@lists.grok.org.uk\n * comp.dcom.sys.cisco@newsgate.cisco.com\n\nFuture updates of this advisory, if any, will be placed on Cisco\u0027s\nworldwide website, but may or may not be actively announced on\nmailing lists or newsgroups. Users concerned about this problem are\nencouraged to check the above URL for any updates. \n\nRevision History\n================\n\n+---------------------------------------+\n| Revision | | Initial |\n| 1.0 | 2009-March-25 | public |\n| | | release. |\n+---------------------------------------+\n\nCisco Security Procedures\n=========================\n\nComplete information on reporting security vulnerabilities in Cisco\nproducts, obtaining assistance with security incidents, and\nregistering to receive security information from Cisco, is available\non Cisco\u0027s worldwide website at \nhttp://www.cisco.com/en/US/products/products_security_vulnerability_policy.html\nThis includes instructions for press inquiries regarding Cisco \nsecurity notices. All Cisco security advisories are available at \nhttp://www.cisco.com/go/psirt\n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1.4.8 (Darwin)\n\niEYEARECAAYFAknKUdcACgkQ86n/Gc8U/uALXwCgmcIGTSzRIHpHRbVVmMNqPFT4\n+CIAn27HdwwpkhVDgEIWTMsIX6NE4BgR\n=+f8D\n-----END PGP SIGNATURE-----\n\n_______________________________________________\nFull-Disclosure - We believe in it. \nCharter: http://lists.grok.org.uk/full-disclosure-charter.html\nHosted and sponsored by Secunia - http://secunia.com/\n. ----------------------------------------------------------------------\n\nSecunia is pleased to announce the release of the annual Secunia\nreport for 2008. \n\n1) An unspecified error in the Cisco Tunneling Control Protocol\n(cTCP) feature can be exploited to exhaust all memory and may crash\nthe cTCP server via a series of specially crafted TCP packets. \n\n2) An unspecified error exists in the handling of IP sockets, which\ncan be exploited to prevent accepting new connections or sessions,\nexhaust memory, cause high CPU load, or to cause a reload of an\naffected device. \n\n4) An unspecified error in the Cisco IOS SCP server (disabled by\ndefault) can be exploited to retrieve or write to arbitrary files on\nthe device\u0027s file system, regardless of the CLI view configuration. \n\nSuccessful exploitation of this vulnerability requires valid user\naccess with an attached command-line interface (CLI) view. \n\n5) An unspecified error in the implementation of the Session\nInitiation Protocol (SIP) can be exploited to reload an affected\ndevice via a specially crafted SIP message. \n\nThis vulnerability is reported in Cisco IOS with SIP voice services\nenabled, and which process SIP messages as part of configured VoIP\nfunctionality. \n\n6) An unspecified error in the handling of TCP packets can be\nexploited to reload an affected device via a sequence of specially\ncrafted TCP packets. \n\nThis vulnerability is reported in Cisco IOS with the following\nfeatures enabled:\n* Airline Product Set (ALPS)\n* Serial Tunnel Code (STUN) and Block Serial Tunnel Code (BSTUN)\n* Native Client Interface Architecture support (NCIA)\n* Data-link switching (DLSw)\n* Remote Source-Route Bridging (RSRB)\n* Point to Point Tunneling Protocol (PPTP)\n* X.25 for Record Boundary Preservation (RBP)\n* X.25 over TCP (XOT)\n* X.25 Routing\n\n7) An unspecified error in the handling of UDP packets can be\nexploited to block an interface of an affected device by sending a\nspecially crafted UDP packets. \n\nSOLUTION:\nPlease see the following vendor advisory for fixed versions. \nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-bundle.shtml\n\nPROVIDED AND/OR DISCOVERED BY:\n1, 3, 5 - 9) Reported by the vendor. \n2) The vendor also credits Jens Link. \n4) The vendor credits Kevin Graham. \n\nORIGINAL ADVISORY:\nCisco:\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-ctcp.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-ip.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-mobileip.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-scp.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-sip.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-tcp.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-udp.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090325-webvpn.shtml\n\nOTHER REFERENCES:\nhttp://www.cisco.com/warp/public/707/cisco-amb-20090325-sip-and-udp.shtml\nhttp://www.cisco.com/warp/public/707/cisco-amb-20090325-ctcp.shtml\n\n----------------------------------------------------------------------\n\nAbout:\nThis Advisory was delivered by Secunia as a free service to help\neverybody keeping their systems up to date against the latest\nvulnerabilities. \n\nSubscribe:\nhttp://secunia.com/advisories/secunia_security_advisories/\n\nDefinitions: (Criticality, Where etc.)\nhttp://secunia.com/advisories/about_secunia_advisories/\n\n\nPlease Note:\nSecunia recommends that you verify all advisories you receive by\nclicking the link. \nSecunia NEVER sends attached files with advisories. \nSecunia does not advise people to install third party patches, only\nuse those supplied by the vendor. \n\n----------------------------------------------------------------------\n\nUnsubscribe: Secunia Security Advisories\nhttp://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org\n\n----------------------------------------------------------------------\n\n\n",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.