var-200806-0200
Vulnerability from variot
Unspecified vulnerability in Cisco Intrusion Prevention System (IPS) 5.x before 5.1(8)E2 and 6.x before 6.0(5)E2, when inline mode and jumbo Ethernet support are enabled, allows remote attackers to cause a denial of service (panic), and possibly bypass intended restrictions on network traffic, via a "specific series of jumbo Ethernet frames.". Cisco Intrusion Prevention System (IPS) There is a service disruption (DoS) An unknown vulnerability exists. An attacker can exploit this issue to cause a kernel panic and deny service for legitimate users. Versions prior to Cisco Intrustion Prevention System 5.1(8)E2 and 6.0(5)E2 are vulnerable. NOTE: This issue affects only platforms that contain gigabit network interfaces and are deployed in inline mode. Successful exploitation of the vulnerabilities described in this article could result in a denial of service over the network, requiring a power outage to resume operation.
SOLUTION: Reportedly, fixed versions 5.1(8)E2 and 6.0(5)E2 will be available soon.
ORIGINAL ADVISORY: http://www.cisco.com/warp/public/707/cisco-sa-20080618-ips.shtml
About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities.
Subscribe: http://secunia.com/secunia_security_advisories/
Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/
Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. This vulnerability may lead to a kernel panic that requires a power cycle to recover platform operation.
Cisco has released free software updates that address this vulnerability. There is a workaround for this vulnerability.
This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20080618-ips.shtml.
To determine the version of software that is running on a Cisco IPS platform, log into the platform using the console or Secure Shell (SSH) and issue the show version command.
sensor# show version
Application Partition:
Cisco Intrusion Prevention System, Version 6.0(4a)E1
To determine whether a Cisco IPS platform has interfaces configured for inline mode, log into the platform using the console or SSH and issue the show interfaces command. Look for paired interfaces in the Inline Mode statement of the command output.
sensor# show interfaces
...
MAC statistics from interface GigabitEthernet0/1
Interface function = Sensing interface
Description =
Media Type = TX
Missed Packet Percentage = 0
Inline Mode = Paired with interface GigabitEthernet0/0
...
MAC statistics from interface GigabitEthernet0/0
Interface function = Sensing interface
Description =
Media Type = TX
Missed Packet Percentage = 0
Inline Mode = Paired with interface GigabitEthernet0/1
Products Confirmed Not Vulnerable +--------------------------------
The following Cisco IPS platforms are not vulnerable:
- 4210
- 4215
- SSM-AIP10
- SSM-AIP20
- SSM-AIP40
- AIM-IPS
- NM-CIDS
- IDSM2
Cisco IPS version 6.1(1) is not vulnerable. No other Cisco products are currently known to be affected by this vulnerability.
Jumbo Ethernet support is usually deployed in data center environments to increase inter-server communication performance and is not a default configuration for Cisco routers and switches.
If they are configured to use bypass mode to allow traffic to pass in the event of a system failure, all Cisco IPS platforms will fail to forward traffic except for the 4260 and 4270 platforms. The Cisco IPS 4260 and 4270 platforms contain a hardware bypass feature that allows them to pass network traffic in the event of a kernel panic or power outage. They will pass traffic by default if the hardware bypass feature is engaged.
This vulnerability is documented in Cisco Bug ID CSCso64762 and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2008-2060.
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
CSCso64762 - IPS Jumbo frame not processed properly
CVSS Base Score - 7.8 Access Vector - Network Access Complexity - Medium Authentication - None Confidentiality Impact - Partial Integrity Impact - None Availability Impact - Complete
CVSS Temporal Score - 6.4 Exploitability - Functional Remediation Level - Official Fix Report Confidence - Confirmed
Impact
Successful exploitation of the vulnerability may result in a network denial of service condition. A power cycle is required to recover operation. An attacker may be able to evade access controls and detection of malicious activity in the case of Cisco IPS 4260/4270 platforms that have hardware bypass configured to pass traffic in the event of a kernel panic.
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.
This vulnerability is fixed in Cisco IPS versions 5.1(8)E2 and 6.0(5) E2 that are expected to be available for download by June 20, 2008.
Fixed software Cisco IPS version 5.1(8)E2 will be available at the following link:
http://www.cisco.com/pcgi-bin/tablebuild.pl/ips5?psrtdcat20e2
Fixed software Cisco IPS version 6.0(5)E2 will be available at the following link:
http://www.cisco.com/pcgi-bin/tablebuild.pl/ips6?psrtdcat20e2
Workarounds
To workaround this vulnerability, administrators can disable jumbo Ethernet support on routers and switches directly that are connected to vulnerable Cisco IPS platforms. This workaround may produce a negative performance impact in certain environments. Administrators are encouraged to upgrade to fixed software.
For more information about configuring Jumbo frames on Cisco switches, please reference the following link:
http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml
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/products/prod_warranties_item09186a008088e31f.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 vulnerability described in this advisory.
This vulnerability was reported to Cisco by HD Moore of BreakingPoint Systems.
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-20080618-ips.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 | 2008-June-18 | 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-----
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"data": "Unspecified vulnerability in Cisco Intrusion Prevention System (IPS) 5.x before 5.1(8)E2 and 6.x before 6.0(5)E2, when inline mode and jumbo Ethernet support are enabled, allows remote attackers to cause a denial of service (panic), and possibly bypass intended restrictions on network traffic, via a \"specific series of jumbo Ethernet frames.\". Cisco Intrusion Prevention System (IPS) There is a service disruption (DoS) An unknown vulnerability exists. \nAn attacker can exploit this issue to cause a kernel panic and deny service for legitimate users. \nVersions prior to Cisco Intrustion Prevention System 5.1(8)E2 and 6.0(5)E2 are vulnerable. \nNOTE: This issue affects only platforms that contain gigabit network interfaces and are deployed in inline mode. Successful exploitation of the vulnerabilities described in this article could result in a denial of service over the network, requiring a power outage to resume operation. \n\nSOLUTION:\nReportedly, fixed versions 5.1(8)E2 and 6.0(5)E2 will be available\nsoon. \n\nORIGINAL ADVISORY:\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080618-ips.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/secunia_security_advisories/\n\nDefinitions: (Criticality, Where etc.)\nhttp://secunia.com/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. This vulnerability may lead to a kernel panic that requires a\npower cycle to recover platform operation. \n\nCisco has released free software updates that address this\nvulnerability. There is a workaround for this vulnerability. \n\nThis advisory is posted at\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080618-ips.shtml. \n\nTo determine the version of software that is running on a Cisco IPS\nplatform, log into the platform using the console or Secure Shell\n(SSH) and issue the show version command. \n\n sensor# show version \n Application Partition:\n \n Cisco Intrusion Prevention System, Version 6.0(4a)E1\n\nTo determine whether a Cisco IPS platform has interfaces configured\nfor inline mode, log into the platform using the console or SSH and\nissue the show interfaces command. Look for paired interfaces in the\nInline Mode statement of the command output. \n\n sensor# show interfaces\n ... \n MAC statistics from interface GigabitEthernet0/1\n Interface function = Sensing interface\n Description =\n Media Type = TX\n Missed Packet Percentage = 0\n Inline Mode = Paired with interface GigabitEthernet0/0\n ... \n MAC statistics from interface GigabitEthernet0/0\n Interface function = Sensing interface\n Description =\n Media Type = TX\n Missed Packet Percentage = 0\n Inline Mode = Paired with interface GigabitEthernet0/1\n\nProducts Confirmed Not Vulnerable\n+--------------------------------\n\nThe following Cisco IPS platforms are not vulnerable:\n\n * 4210\n * 4215\n * SSM-AIP10\n * SSM-AIP20\n * SSM-AIP40\n * AIM-IPS\n * NM-CIDS\n * IDSM2\n\nCisco IPS version 6.1(1) is not vulnerable. No other Cisco\nproducts are currently known to be affected by this vulnerability. \n\nJumbo Ethernet support is usually deployed in data center\nenvironments to increase inter-server communication performance and\nis not a default configuration for Cisco routers and switches. \n\nIf they are configured to use bypass mode to allow traffic to pass in\nthe event of a system failure, all Cisco IPS platforms will fail to\nforward traffic except for the 4260 and 4270 platforms. The Cisco IPS\n4260 and 4270 platforms contain a hardware bypass feature that allows\nthem to pass network traffic in the event of a kernel panic or power\noutage. They will pass traffic by default if the hardware bypass\nfeature is engaged. \n\nThis vulnerability is documented in Cisco Bug ID CSCso64762 and has\nbeen assigned Common Vulnerabilities and Exposures (CVE) ID \nCVE-2008-2060. \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\nCSCso64762 - IPS Jumbo frame not processed properly\n\nCVSS Base Score - 7.8\n Access Vector - Network\n Access Complexity - Medium\n Authentication - None\n Confidentiality Impact - Partial\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\nImpact\n======\n\nSuccessful exploitation of the vulnerability may result in a network\ndenial of service condition. A power cycle is required to recover\noperation. An attacker may be able to evade access controls and\ndetection of malicious activity in the case of Cisco IPS 4260/4270\nplatforms that have hardware bypass configured to pass traffic in the\nevent of a kernel panic. \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\nThis vulnerability is fixed in Cisco IPS versions 5.1(8)E2 and 6.0(5)\nE2 that are expected to be available for download by June 20, 2008. \n\nFixed software Cisco IPS version 5.1(8)E2 will be available at the\nfollowing link:\n\nhttp://www.cisco.com/pcgi-bin/tablebuild.pl/ips5?psrtdcat20e2\n\nFixed software Cisco IPS version 6.0(5)E2 will be available at the\nfollowing link:\n\nhttp://www.cisco.com/pcgi-bin/tablebuild.pl/ips6?psrtdcat20e2\n\nWorkarounds\n===========\n\nTo workaround this vulnerability, administrators can disable jumbo\nEthernet support on routers and switches directly that are connected\nto vulnerable Cisco IPS platforms. This workaround may produce a\nnegative performance impact in certain environments. Administrators\nare encouraged to upgrade to fixed software. \n\nFor more information about configuring Jumbo frames on Cisco\nswitches, please reference the following link:\n\nhttp://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml\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/products/prod_warranties_item09186a008088e31f.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 vulnerability described in this advisory. \n\nThis vulnerability was reported to Cisco by HD Moore of BreakingPoint\nSystems. \n\nStatus of this Notice: FINAL\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-20080618-ips.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 | 2008-June-18 | 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 security\nnotices. All Cisco security advisories are available at\nhttp://www.cisco.com/go/psirt. \n-----BEGIN PGP SIGNATURE-----\n\niD8DBQFIWTYs86n/Gc8U/uARAn3FAKCIkVy8TfwwoKE3pFjMfRMyZN4+SACghKEB\nVb2Ngh4ALQrSRsWdWiy/2u4=\n=IvlU\n-----END PGP SIGNATURE-----\n",
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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.