var-201102-0222
Vulnerability from variot
Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 8.0 before 8.0(5.20), 8.1 before 8.1(2.48), 8.2 before 8.2(3), and 8.3 before 8.3(2.1), when the RIP protocol and the Cisco Phone Proxy functionality are configured, allow remote attackers to cause a denial of service (device reload) via a RIP update, aka Bug ID CSCtg66583. The problem is Bug ID CSCtg66583 It is a problem.By a third party RIP Service disruption through updates (DoS) There is a possibility of being put into a state. The Cisco Adaptive Security Appliance is an adaptive security appliance that provides modules for security and VPN services. Cisco ASA 5500 series security appliances are prone to multiple remote vulnerabilities. An attacker can exploit these issues to disclose potentially sensitive information or to cause denial-of-service conditions. FWSM is a firewall service module.
Cisco has released free software updates that address these vulnerabilities.
This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20110223-asa.shtml. A separate Cisco Security Advisory has been published to disclose the vulnerability that affects the Cisco FWSM. That advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20110223-fwsm.shtml.
Vulnerable Products +------------------
For specific version information, refer to the Software Versions and Fixes section of this advisory.
Transparent Firewall Packet Buffer Exhaustion Vulnerability +----------------------------------------------------------
A packet buffer exhaustion vulnerability affects multiple versions of Cisco ASA Software when a security appliance is configured to operate in the transparent firewall mode. Transparent firewall mode is enabled on the appliance if the command "firewall transparent" is present in the configuration. The default firewall mode is routed, not transparent.
Administrators can determine if SCCP inspection is enabled by issuing the "show service-policy | include skinny" command and confirming that output, such as what is displayed in the following example, is returned.
ciscoasa# show service-policy | include skinny
Inspect: skinny, packet 0, drop 0, reset-drop 0
Alternatively, a device that has SCCP inspection enabled has a configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect skinny
...
!
service-policy global_policy global
Note: The service policy could also be applied to a specific interface instead of globally, which is displayed in the previous example.
SCCP inspection is enabled by default. The following example displays an affected configuration (Cisco ASA Software version 8.0 and 8.1):
router rip
...
!
phone-proxy <instance name>
media-termination address <IP address>
...
!
media-termination <instance name>
address <IP address>
!
<Rest of phone proxy feature configuration>
A security appliance is vulnerable if it is processing RIP messages ("router rip") and if a global media termination address is configured for the Cisco Phone Proxy feature (refer to previous example). Note that Cisco ASA Software versions 8.0 and 8.1 only allow a global media termination address. However, in Cisco ASA Software version 8.2 and later, it is possible to tie a media termination address to an interface. This configuration, which is accomplished by issuing the command "address interface " in media termination configuration mode, is not affected. An affected configuration consists of the following minimum commands:
crypto ca trustpoint <trustpoint name>
keypair <keypair name>
crl configure
crypto ca server
crypto ca certificate chain <trustpoint name>
certificate ca 01
...
!
http server enable
The local CA server is not enabled by default.
Because Cisco PIX 500 Series Security Appliances reached the end of software maintenance releases milestone on July 28, 2009, no further software releases will be available. For more information, refer to the End of Life announcement at http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5708/ps5709/ps2030/end_of_life_notice_cisco_pix_525_sec_app.html.
How to Determine Software Versions +---------------------------------
To determine whether a vulnerable version of Cisco ASA Software is running on an appliance, administrators can issue the "show version" command. It offers firewall, intrusion prevention system (IPS), anti-X, and virtual private network (VPN) services. The number of available packet buffers may decrease when a security appliance receives IPv6 traffic and is not configured for IPv6 operation. IPv6 transit traffic does not cause a problem.
Administrators can check packet buffer utilization by issuing the command "show blocks" and inspecting the output for the number of available 1,550-byte blocks. If the number of blocks is zero (indicated by 0 in the CNT column), then the security appliance may be experiencing this issue. For example:
ciscoasa# show blocks
SIZE MAX LOW CNT
0 400 360 400
4 200 199 199
80 400 358 400
256 1412 1381 1412
1550 6274 0 0
...
This vulnerability is documented in Cisco bug ID CSCtj04707 and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-0393. Appliances are only vulnerable if SCCP inspection is enabled.
Only transit traffic can trigger this vulnerability; traffic that is destined to the appliance will not trigger the vulnerability.
This vulnerability is documented in Cisco bug ID CSCtg69457 and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-0394.
Note: the affected configuration requires that a global media termination address is configured, which is the only possible configuration option in Cisco ASA Software versions 8.0 and 8.1. However, it is possible to tie a media termination address to an interface in Cisco ASA Software version 8.2 and later. This configuration is not vulnerable.
This vulnerability is documented in Cisco bug ID CSCtg66583 and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-0395. but not system:) when the security appliance is configured as a local CA server. No authentication is required. File systems could contain sensitive information, such as backup device configurations (which may contain passwords or shared secrets), Cisco ASA Software images, or digital certificates.
This vulnerability is documented in Cisco bug ID CSCtk12352 and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-0396.
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
- CSCtj04707 ("Possible packet buffer exhaustion when operating in transparent mode ")
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
- CSCtg69457 ("SCCP inspection DoS vulnerability")
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
- CSCtg66583 ("RIP denial of service vulnerability")
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
- CSCtk12352 ("Possible to browse flash memory when CA is enabled")
CVSS Base Score - 7.8 Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - Complete Integrity Impact - None Availability Impact - None
CVSS Temporal Score - 6.4 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed
Impact
Transparent Firewall Packet Buffer Exhaustion Vulnerability +----------------------------------------------------------
Successful exploitation of this vulnerability could cause a decrease in the number of available packet buffers. Repeated exploitation could eventually deplete all available packet buffers, which may cause an appliance to stop forwarding traffic.
SCCP Inspection Denial of Service Vulnerability +----------------------------------------------
Successful exploitation of this vulnerability could cause a reload of the affected device. Repeated exploitation may result in a sustained denial of service condition.
RIP Denial of Service Vulnerability +----------------------------------
Successful exploitation of this vulnerability could cause a reload of the affected device. Repeated exploitation may result in a sustained denial of service condition.
Unauthorized File System Access Vulnerability +--------------------------------------------
Successful exploitation of this vulnerability could allow unauthorized, unauthenticated users to retrieve files that are stored in an affected appliance's file system, which may contain sensitive information.
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.
+---------------------------------------+ | Vulnerability | Major | First Fixed | | | Release | Release | |---------------+---------+-------------| | | | 7.0(8.12); | | | | available | | | 7.0 | late | | | | February | | | | 2011 | | |---------+-------------| | | | Vulnerable; | | | 7.1 | migrate to | | | | 7.2(5.2) | |Transparent |---------+-------------| | Firewall | 7.2 | 7.2(5.2) | |Packet Buffer |---------+-------------| | Exhaustion | 8.0 | 8.0(5.21) | |Vulnerability |---------+-------------| | (CSCtj04707) | | 8.1(2.49); | | | 8.1 | available | | | | early March | | | | 2011 | | |---------+-------------| | | 8.2 | 8.2(3.6) | | |---------+-------------| | | 8.3 | 8.3(2.7) | | |---------+-------------| | | 8.4 | Not | | | | vulnerable | |---------------+---------+-------------| | | 7.0 | 7.0(8.11) | | |---------+-------------| | | | Vulnerable; | | | 7.1 | migrate to | | | | 7.2(5.1) | | |---------+-------------| | SCCP | 7.2 | 7.2(5.1) | |Inspection |---------+-------------| | Denial of | 8.0 | 8.0(5.19) | |Service |---------+-------------| | Vulnerability | 8.1 | 8.1(2.47) | |(CSCtg69457) |---------+-------------| | | 8.2 | 8.2(2.19) | | |---------+-------------| | | 8.3 | 8.3(1.8) | | |---------+-------------| | | 8.4 | Not | | | | vulnerable | |---------------+---------+-------------| | | 7.0 | Not | | | | vulnerable | | |---------+-------------| | | 7.1 | Not | | | | vulnerable | | |---------+-------------| | | 7.2 | Not | | RIP Denial of | | vulnerable | |Service |---------+-------------| | Vulnerability | 8.0 | 8.0(5.20) | |(CSCtg66583) |---------+-------------| | | 8.1 | 8.1(2.48) | | |---------+-------------| | | 8.2 | 8.2(3) | | |---------+-------------| | | 8.3 | 8.3(2.1) | | |---------+-------------| | | 8.4 | Not | | | | vulnerable | |---------------+---------+-------------| | | 7.0 | Not | | | | vulnerable | | |---------+-------------| | | 7.1 | Not | | | | vulnerable | | |---------+-------------| | | 7.2 | Not | | | | vulnerable | |Unauthorized |---------+-------------| | File System | 8.0 | 8.0(5.23) | |Access |---------+-------------| | Vulnerability | | 8.1(2.49); | | (CSCtk12352) | 8.1 | available | | | | early March | | | | 2011 | | |---------+-------------| | | 8.2 | 8.2(4.1) | | |---------+-------------| | | 8.3 | 8.3(2.13) | | |---------+-------------| | | 8.4 | Not | | | | vulnerable | +---------------------------------------+
Recommended Releases +-------------------
The following table lists all recommended releases. These recommended releases contain the fixes for all vulnerabilities in this advisory. Cisco recommends upgrading to a release that is equal to or later than these recommended releases. These vulnerabilities and their respective workarounds are independent of each other.
Transparent Firewall Packet Buffer Exhaustion Vulnerability +----------------------------------------------------------
There are no workarounds for this vulnerability.
SCCP Inspection Denial of Service Vulnerability +----------------------------------------------
Administrators can mitigate this vulnerability by disabling SCCP inspection if it is not required. Administrators can disable SCCP inspection by issuing the "no inspect skinny" command in class configuration submode in the policy map configuration. On Cisco ASA Software version 8.2 and later, administrators can configure a non-global media termination address by specifying a termination address that will be tied to a specific interface. For example:
router rip
...
!
media-termination <instance name>
address <IP address> interface <interface name>
!
<Rest of phone proxy feature configuration>
Unauthorized File System Access Vulnerability +--------------------------------------------
There are no workarounds for this vulnerability.
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/en/US/support/tsd_cisco_worldwide_contacts.html 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.
The Transparent Firewall Packet Buffer Exhaustion Vulnerability, SCCP Inspection Denial of Service Vulnerability, and RIP Denial of Service Vulnerability were found during internal testing.
The Unauthorized File System Access Vulnerability was discovered during the resolution of customer support cases.
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-20110223-asa.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-bulletins@lists.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 1.0 | 2011-February-23 | Initial 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.
+-------------------------------------------------------------------- Copyright 2010-2011 Cisco Systems, Inc. All rights reserved. +--------------------------------------------------------------------
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TITLE: Cisco ASA 5500 Series Multiple Vulnerabilities
SECUNIA ADVISORY ID: SA43488
VERIFY ADVISORY: Secunia.com http://secunia.com/advisories/43488/ Customer Area (Credentials Required) https://ca.secunia.com/?page=viewadvisory&vuln_id=43488
RELEASE DATE: 2011-03-12
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DESCRIPTION: Some vulnerabilities have been reported in Cisco Adaptive Security Appliance (ASA), which can be exploited by malicious people to cause a DoS (Denial of Service) and disclose potentially sensitive information. "flash:", "disk0:", or "disk1:" but not "system:"). This can be exploited to gain access to e.g. Please see vendor advisories for details.
PROVIDED AND/OR DISCOVERED BY: 1-3) Reported by the vendor.
ORIGINAL ADVISORY: Cisco: http://www.cisco.com/warp/public/707/cisco-sa-20110223-asa.shtml http://www.cisco.com/en/US/products/products_security_advisory09186a0080b6e14d.shtml
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"data": "Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 8.0 before 8.0(5.20), 8.1 before 8.1(2.48), 8.2 before 8.2(3), and 8.3 before 8.3(2.1), when the RIP protocol and the Cisco Phone Proxy functionality are configured, allow remote attackers to cause a denial of service (device reload) via a RIP update, aka Bug ID CSCtg66583. The problem is Bug ID CSCtg66583 It is a problem.By a third party RIP Service disruption through updates (DoS) There is a possibility of being put into a state. The Cisco Adaptive Security Appliance is an adaptive security appliance that provides modules for security and VPN services. Cisco ASA 5500 series security appliances are prone to multiple remote vulnerabilities. \nAn attacker can exploit these issues to disclose potentially sensitive information or to cause denial-of-service conditions. FWSM is a firewall service module. \n\nCisco has released free software updates that address these\nvulnerabilities. \n\nThis advisory is posted at\nhttp://www.cisco.com/warp/public/707/cisco-sa-20110223-asa.shtml. A separate Cisco Security\nAdvisory has been published to disclose the vulnerability\nthat affects the Cisco FWSM. That advisory is available at\nhttp://www.cisco.com/warp/public/707/cisco-sa-20110223-fwsm.shtml. \n\nVulnerable Products\n+------------------\n\nFor specific version information, refer to the Software Versions and\nFixes section of this advisory. \n\nTransparent Firewall Packet Buffer Exhaustion Vulnerability\n+----------------------------------------------------------\n\nA packet buffer exhaustion vulnerability affects multiple versions of\nCisco ASA Software when a security appliance is configured to operate in\nthe transparent firewall mode. Transparent firewall mode is enabled on\nthe appliance if the command \"firewall transparent\" is present in the\nconfiguration. The default firewall mode is routed, not transparent. \n\nAdministrators can determine if SCCP inspection is enabled by issuing\nthe \"show service-policy | include skinny\" command and confirming that\noutput, such as what is displayed in the following example, is returned. \n\n ciscoasa# show service-policy | include skinny\n Inspect: skinny, packet 0, drop 0, reset-drop 0\n\nAlternatively, a device that has SCCP inspection enabled has a\nconfiguration similar to the following:\n\n class-map inspection_default\n match default-inspection-traffic\n\n !\n\n policy-map global_policy\n class inspection_default\n ... \n inspect skinny\n ... \n\n !\n\n service-policy global_policy global\n\nNote: The service policy could also be applied to a specific\ninterface instead of globally, which is displayed in the previous\nexample. \n\nSCCP inspection is enabled by default. The\nfollowing example displays an affected configuration (Cisco ASA\nSoftware version 8.0 and 8.1):\n\n router rip\n ... \n\n !\n\n phone-proxy \u003cinstance name\u003e\n media-termination address \u003cIP address\u003e\n ... \n\n !\n\n media-termination \u003cinstance name\u003e\n address \u003cIP address\u003e\n\n !\n\n \u003cRest of phone proxy feature configuration\u003e\n\nA security appliance is vulnerable if it is processing RIP messages\n(\"router rip\") and if a global media termination address is configured\nfor the Cisco Phone Proxy feature (refer to previous example). Note\nthat Cisco ASA Software versions 8.0 and 8.1 only allow a global\nmedia termination address. However, in Cisco ASA Software version 8.2\nand later, it is possible to tie a media termination address to an\ninterface. This configuration, which is accomplished by issuing the\ncommand \"address \u003cIP address\u003e interface \u003cinterface name\u003e\" in media\ntermination configuration mode, is not affected. An affected\nconfiguration consists of the following minimum commands:\n\n crypto ca trustpoint \u003ctrustpoint name\u003e\n keypair \u003ckeypair name\u003e\n crl configure\n crypto ca server\n crypto ca certificate chain \u003ctrustpoint name\u003e\n certificate ca 01\n ... \n\n !\n\n http server enable\n\nThe local CA server is not enabled by default. \n\nBecause Cisco PIX 500 Series Security Appliances reached the end\nof software maintenance releases milestone on July 28, 2009,\nno further software releases will be available. \nFor more information, refer to the End of Life announcement at\nhttp://www.cisco.com/en/US/prod/collateral/vpndevc/ps5708/ps5709/ps2030/end_of_life_notice_cisco_pix_525_sec_app.html. \n\nHow to Determine Software Versions\n+---------------------------------\n\nTo determine whether a vulnerable version of Cisco ASA Software is\nrunning on an appliance, administrators can issue the \"show version\"\ncommand. It offers firewall,\nintrusion prevention system (IPS), anti-X, and virtual private\nnetwork (VPN) services. The number\nof available packet buffers may decrease when a security appliance\nreceives IPv6 traffic and is not configured for IPv6 operation. IPv6\ntransit traffic does not cause a problem. \n\nAdministrators can check packet buffer utilization by issuing the\ncommand \"show blocks\" and inspecting the output for the number of\navailable 1,550-byte blocks. If the number of blocks is zero (indicated\nby 0 in the CNT column), then the security appliance may be experiencing\nthis issue. For example:\n\n ciscoasa# show blocks\n SIZE MAX LOW CNT\n 0 400 360 400\n 4 200 199 199\n 80 400 358 400\n 256 1412 1381 1412\n 1550 6274 0 0\n ... \n\nThis vulnerability is documented in Cisco bug ID CSCtj04707 and has been\nassigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-0393. Appliances are only vulnerable if\nSCCP inspection is enabled. \n\nOnly transit traffic can trigger this vulnerability; traffic that is\ndestined to the appliance will not trigger the vulnerability. \n\nThis vulnerability is documented in Cisco bug ID CSCtg69457 and has been\nassigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-0394. \n\nNote: the affected configuration requires that a global media\ntermination address is configured, which is the only possible\nconfiguration option in Cisco ASA Software versions 8.0 and 8.1. \nHowever, it is possible to tie a media termination address to an\ninterface in Cisco ASA Software version 8.2 and later. This\nconfiguration is not vulnerable. \n\nThis vulnerability is documented in Cisco bug ID CSCtg66583 and has been\nassigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-0395. but not system:) when the\nsecurity appliance is configured as a local CA server. No\nauthentication is required. File systems could contain sensitive\ninformation, such as backup device configurations (which may contain\npasswords or shared secrets), Cisco ASA Software images, or digital\ncertificates. \n\nThis vulnerability is documented in Cisco bug ID CSCtk12352 and has been\nassigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-0396. \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\n* CSCtj04707 (\"Possible packet buffer exhaustion when operating in transparent mode \")\n\nCVSS Base Score - 7.8\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 Exploitability - Functional\n Remediation Level - Official-Fix\n Report Confidence - Confirmed\n\n* CSCtg69457 (\"SCCP inspection DoS vulnerability\")\n\nCVSS Base Score - 7.8\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 Exploitability - Functional\n Remediation Level - Official-Fix\n Report Confidence - Confirmed\n\n* CSCtg66583 (\"RIP denial of service vulnerability\")\n\nCVSS Base Score - 7.8\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 Exploitability - Functional\n Remediation Level - Official-Fix\n Report Confidence - Confirmed\n\n* CSCtk12352 (\"Possible to browse flash memory when CA is enabled\")\n\nCVSS Base Score - 7.8\n Access Vector - Network\n Access Complexity - Low\n Authentication - None\n Confidentiality Impact - Complete\n Integrity Impact - None\n Availability Impact - None\n\nCVSS Temporal Score - 6.4\n Exploitability - Functional\n Remediation Level - Official-Fix\n Report Confidence - Confirmed\n\n\nImpact\n======\n\nTransparent Firewall Packet Buffer Exhaustion Vulnerability\n+----------------------------------------------------------\n\nSuccessful exploitation of this vulnerability could cause a decrease\nin the number of available packet buffers. Repeated exploitation\ncould eventually deplete all available packet buffers, which may\ncause an appliance to stop forwarding traffic. \n\nSCCP Inspection Denial of Service Vulnerability\n+----------------------------------------------\n\nSuccessful exploitation of this vulnerability could cause a reload of\nthe affected device. Repeated exploitation may result in a sustained\ndenial of service condition. \n\nRIP Denial of Service Vulnerability\n+----------------------------------\n\nSuccessful exploitation of this vulnerability could cause a reload of\nthe affected device. Repeated exploitation may result in a sustained\ndenial of service condition. \n\nUnauthorized File System Access Vulnerability\n+--------------------------------------------\n\nSuccessful exploitation of this vulnerability could allow\nunauthorized, unauthenticated users to retrieve files that are stored\nin an affected appliance\u0027s file system, which may contain sensitive\ninformation. \n\nSoftware Versions and Fixes\n===========================\n\nWhen considering software upgrades, also consult\nhttp://www.cisco.com/go/psirt and any subsequent advisories to determine\nexposure 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\n+---------------------------------------+\n| Vulnerability | Major | First Fixed |\n| | Release | Release |\n|---------------+---------+-------------|\n| | | 7.0(8.12); |\n| | | available |\n| | 7.0 | late |\n| | | February |\n| | | 2011 |\n| |---------+-------------|\n| | | Vulnerable; |\n| | 7.1 | migrate to |\n| | | 7.2(5.2) |\n|Transparent |---------+-------------|\n| Firewall | 7.2 | 7.2(5.2) |\n|Packet Buffer |---------+-------------|\n| Exhaustion | 8.0 | 8.0(5.21) |\n|Vulnerability |---------+-------------|\n| (CSCtj04707) | | 8.1(2.49); |\n| | 8.1 | available |\n| | | early March |\n| | | 2011 |\n| |---------+-------------|\n| | 8.2 | 8.2(3.6) |\n| |---------+-------------|\n| | 8.3 | 8.3(2.7) |\n| |---------+-------------|\n| | 8.4 | Not |\n| | | vulnerable |\n|---------------+---------+-------------|\n| | 7.0 | 7.0(8.11) |\n| |---------+-------------|\n| | | Vulnerable; |\n| | 7.1 | migrate to |\n| | | 7.2(5.1) |\n| |---------+-------------|\n| SCCP | 7.2 | 7.2(5.1) |\n|Inspection |---------+-------------|\n| Denial of | 8.0 | 8.0(5.19) |\n|Service |---------+-------------|\n| Vulnerability | 8.1 | 8.1(2.47) |\n|(CSCtg69457) |---------+-------------|\n| | 8.2 | 8.2(2.19) |\n| |---------+-------------|\n| | 8.3 | 8.3(1.8) |\n| |---------+-------------|\n| | 8.4 | Not |\n| | | vulnerable |\n|---------------+---------+-------------|\n| | 7.0 | Not |\n| | | vulnerable |\n| |---------+-------------|\n| | 7.1 | Not |\n| | | vulnerable |\n| |---------+-------------|\n| | 7.2 | Not |\n| RIP Denial of | | vulnerable |\n|Service |---------+-------------|\n| Vulnerability | 8.0 | 8.0(5.20) |\n|(CSCtg66583) |---------+-------------|\n| | 8.1 | 8.1(2.48) |\n| |---------+-------------|\n| | 8.2 | 8.2(3) |\n| |---------+-------------|\n| | 8.3 | 8.3(2.1) |\n| |---------+-------------|\n| | 8.4 | Not |\n| | | vulnerable |\n|---------------+---------+-------------|\n| | 7.0 | Not |\n| | | vulnerable |\n| |---------+-------------|\n| | 7.1 | Not |\n| | | vulnerable |\n| |---------+-------------|\n| | 7.2 | Not |\n| | | vulnerable |\n|Unauthorized |---------+-------------|\n| File System | 8.0 | 8.0(5.23) |\n|Access |---------+-------------|\n| Vulnerability | | 8.1(2.49); |\n| (CSCtk12352) | 8.1 | available |\n| | | early March |\n| | | 2011 |\n| |---------+-------------|\n| | 8.2 | 8.2(4.1) |\n| |---------+-------------|\n| | 8.3 | 8.3(2.13) |\n| |---------+-------------|\n| | 8.4 | Not |\n| | | vulnerable |\n+---------------------------------------+\n\nRecommended Releases\n+-------------------\n\nThe following table lists all recommended releases. These recommended\nreleases contain the fixes for all vulnerabilities in this advisory. \nCisco recommends upgrading to a release that is equal to or later\nthan these recommended releases. These vulnerabilities and their respective workarounds\nare independent of each other. \n\nTransparent Firewall Packet Buffer Exhaustion Vulnerability\n+----------------------------------------------------------\n\nThere are no workarounds for this vulnerability. \n\nSCCP Inspection Denial of Service Vulnerability\n+----------------------------------------------\n\nAdministrators can mitigate this vulnerability by disabling SCCP\ninspection if it is not required. Administrators can disable SCCP\ninspection by issuing the \"no inspect skinny\" command in class\nconfiguration submode in the policy map configuration. \nOn Cisco ASA Software version 8.2 and later, administrators can\nconfigure a non-global media termination address by specifying a\ntermination address that will be tied to a specific interface. For\nexample:\n\n router rip\n ... \n\n !\n\n media-termination \u003cinstance name\u003e\n address \u003cIP address\u003e interface \u003cinterface name\u003e\n\n !\n\n \u003cRest of phone proxy feature configuration\u003e\n\nUnauthorized File System Access Vulnerability\n+--------------------------------------------\n\nThere are no workarounds for this vulnerability. \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\nsets they have purchased. By installing, downloading, accessing\nor otherwise using such software upgrades, customers agree to be\nbound by 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\nhttp://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html\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\nThe Transparent Firewall Packet Buffer Exhaustion Vulnerability, SCCP\nInspection Denial of Service Vulnerability, and RIP Denial of Service\nVulnerability were found during internal testing. \n\nThe Unauthorized File System Access Vulnerability was discovered\nduring the resolution of customer support cases. \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-20110223-asa.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-bulletins@lists.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 1.0 | 2011-February-23 | Initial public release. |\n+------------------------------------------------------------+\n\nCisco Security Procedures\n=========================\n\nComplete information on reporting security vulnerabilities\nin Cisco products, obtaining assistance with security\nincidents, and registering to receive security information\nfrom Cisco, is available on Cisco\u0027s worldwide website at\nhttp://www.cisco.com/en/US/products/products_security_vulnerability_policy.html. \nThis includes instructions for press inquiries regarding\nCisco security notices. \n\n+--------------------------------------------------------------------\nCopyright 2010-2011 Cisco Systems, Inc. All rights reserved. \n+--------------------------------------------------------------------\n\nUpdated: Feb 23, 2011 Document ID: 112881\n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1.4.10 (GNU/Linux)\n\niF4EAREIAAYFAk1lMPwACgkQQXnnBKKRMNBMBQD/a+ok1yfH7Fb21ZoPDh56AC4A\nV/yl9nhgKFu3M/lDOqgA/0kybpk0NolgXRBExnKPMPOI94KiHhhPQtUYxo/j3tCH\n=sciX\n-----END PGP SIGNATURE-----\n. ----------------------------------------------------------------------\n\n\nGet a tax break on purchases of Secunia Solutions!\n\nIf you are a U.S. company, you may be qualified for a tax break for your software purchases. Learn more at:\nhttp://secunia.com/products/corporate/vim/section_179/\n\n\n----------------------------------------------------------------------\n\nTITLE:\nCisco ASA 5500 Series Multiple Vulnerabilities\n\nSECUNIA ADVISORY ID:\nSA43488\n\nVERIFY ADVISORY:\nSecunia.com\nhttp://secunia.com/advisories/43488/\nCustomer Area (Credentials Required)\nhttps://ca.secunia.com/?page=viewadvisory\u0026vuln_id=43488\n\nRELEASE DATE:\n2011-03-12\n\nDISCUSS ADVISORY:\nhttp://secunia.com/advisories/43488/#comments\n\nAVAILABLE ON SITE AND IN CUSTOMER AREA:\n * Last Update\n * Popularity\n * Comments\n * Criticality Level\n * Impact\n * Where\n * Solution Status\n * Operating System / Software\n * CVE Reference(s)\n\nhttp://secunia.com/advisories/43488/\n\nONLY AVAILABLE IN CUSTOMER AREA:\n * Authentication Level\n * Report Reliability\n * Secunia PoC\n * Secunia Analysis\n * Systems Affected\n * Approve Distribution\n * Remediation Status\n * Secunia CVSS Score\n * CVSS\n\nhttps://ca.secunia.com/?page=viewadvisory\u0026vuln_id=43488\n\nONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:\n * AUTOMATED SCANNING\n\nhttp://secunia.com/vulnerability_scanning/personal/\nhttp://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/\n\nDESCRIPTION:\nSome vulnerabilities have been reported in Cisco Adaptive Security\nAppliance (ASA), which can be exploited by malicious people to cause\na DoS (Denial of Service) and disclose potentially sensitive\ninformation. \"flash:\", \"disk0:\", or\n\"disk1:\" but not \"system:\"). This can be exploited to gain access to\ne.g. Please see vendor advisories for\ndetails. \n\nPROVIDED AND/OR DISCOVERED BY:\n1-3) Reported by the vendor. \n\nORIGINAL ADVISORY:\nCisco:\nhttp://www.cisco.com/warp/public/707/cisco-sa-20110223-asa.shtml\nhttp://www.cisco.com/en/US/products/products_security_advisory09186a0080b6e14d.shtml\n\nOTHER REFERENCES:\nFurther details available in Customer Area:\nhttp://secunia.com/products/corporate/EVM/\n\nDEEP LINKS:\nFurther details available in Customer Area:\nhttp://secunia.com/products/corporate/EVM/\n\nEXTENDED DESCRIPTION:\nFurther details available in Customer Area:\nhttp://secunia.com/products/corporate/EVM/\n\nEXTENDED SOLUTION:\nFurther details available in Customer Area:\nhttp://secunia.com/products/corporate/EVM/\n\nEXPLOIT:\nFurther details available in Customer Area:\nhttp://secunia.com/products/corporate/EVM/\n\n----------------------------------------------------------------------\n\nAbout:\nThis Advisory was delivered by Secunia as a free service to help\nprivate users 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",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.