VAR-200909-0379

Vulnerability from variot - Updated: 2025-04-10 21:57

The Object Groups for Access Control Lists (ACLs) feature in Cisco IOS 12.2XNB, 12.2XNC, 12.2XND, 12.4MD, 12.4T, 12.4XZ, and 12.4YA allows remote attackers to bypass intended access restrictions via crafted requests, aka Bug IDs CSCsx07114, CSCsu70214, CSCsw47076, CSCsv48603, CSCsy54122, and CSCsu50252. The problem is Bug ID : CSCsx07114, CSCsu70214, CSCsw47076, CSCsv48603, CSCsy54122 and CSCsu50252 It is a problem.A well-crafted request can circumvent access restrictions. Cisco IOS is prone to a security-bypass vulnerability. This issue is documented by the following Cisco Bug IDs: CSCsx07114 CSCsu70214 CSCsw47076 CSCsv48603 CSCsy54122 CSCsu50252. Cisco has released free software updates that address this vulnerability. There are no workarounds for this vulnerability other than disabling the Object Groups for ACLs feature.

This advisory is posted at:

http://www.cisco.com/warp/public/707/cisco-sa-20090923-acl.shtml

Note: The September 23, 2009, Cisco IOS Security Advisory bundled publication includes eleven Security Advisories. Ten of the advisories address vulnerabilities in Cisco IOS Software, and one advisory addresses a vulnerability in Cisco Unified Communications Manager. Each advisory lists the releases that correct the vulnerability or vulnerabilities detailed in the advisory. The following table lists releases that correct all Cisco IOS Software vulnerabilities that have been published on September 23, 2009, or earlier.

http://www.cisco.com/warp/public/707/cisco-sa-20090923-bundle.shtml

Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Advisory Bundled Publication" at the following link:

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep09.html

Affected Products

Vulnerable Products +------------------

Any Cisco device configured with ACLs using the object group feature and running an affected Cisco IOS software version is affected by this vulnerability.

Note: The Object Groups for ACLs feature was introduced in Cisco IOS software version 12.4(20)T.

To verify whether object groups are configured in a Cisco IOS device, use the "show object-group" command in user EXEC or privileged EXEC mode. The following example displays a sample output from the "show object-group" command when object groups are configured:

Router# show object-group
Network object group my_host_group
 host 172.18.104.123

Service object group my_allowed_services
 tcp eq www
 tcp eq 443

Alternatively, administrators can also use the "show running config | include ^ (permit|deny) .*object-group" command to verify whether object groups are configured, as shown in the following example:

Router#show running-config | include ^ (permit|deny) .*object-group
 permit object-group my_allowed_services host 10.10.1.1 host 10.20.1.1
 permit tcp any object-group my_host_group eq 22

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 identifies a Cisco product that is running Cisco IOS Software Release 12.4(20)T with an installed 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

Products Confirmed Not Vulnerable +--------------------------------

Cisco devices that are not configured with object groups are not vulnerable.

No other Cisco products are currently known to be affected by this vulnerability.

Details

In Cisco IOS Software an object group can contain a single object (such as a single IP address, network, or subnet) or multiple objects (such as a combination of multiple IP addresses, networks, or subnets). In an ACL that is based on an object group, administrators can create a single access control entry (ACE) that uses an object group name instead of creating many ACEs, which each would require a different IP address. A similar object group, such as a protocol port group, can be extended to limit access to a set of applications for a user group to a server group.

Note: The Object Groups for ACLs feature was introduced in Cisco IOS software version 12.4(20)T.

Vulnerability Scoring Details

Cisco has provided scores for the vulnerability 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

CSCsx07114, CSCsu70214, CSCsw47076, CSCsv48603, CSCsy54122, CSCsu50252 - Object-group Access Control List Bypass

CVSS Base Score - 4.3

Access Vector - Network Access Complexity - Medium Authentication - None Confidentiality Impact - Parital Integrity Impact - None Availability Impact - none

CVSS Temporal Score - 3.6

Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed

Impact

Successful exploitation of the vulnerability may allow an attacker to access resources that should be protected by the Cisco IOS device.

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. 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 12.1 based releases. | |-------------------------------------------------------------------| | Affected | | Recommended | | 12.3-Based | First Fixed Release | Release | | Releases | | | |-------------------------------------------------------------------| | There are no affected 12.3 based releases. | |-------------------------------------------------------------------| | Affected | | Recommended | | 12.4-Based | First Fixed Release | Release | | Releases | | | |------------+---------------------------------------+--------------| | 12.4 | Not Vulnerable | | |------------+---------------------------------------+--------------| | | Vulnerable; Contact your support | | | 12.4GC | organization per the instructions in | | | | Obtaining Fixed Software section of | | | | this advisory | | |------------+---------------------------------------+--------------| | 12.4JA | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4JDA | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4JDC | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4JDD | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4JK | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4JL | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4JMA | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4JMB | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4JX | Not Vulnerable | | |------------+---------------------------------------+--------------| | | | 12.4(11)MD9 | | | | | | 12.4MD | 12.4(22)MD1 | 12.4(15)MD3 | | | | | | | | 12.4(22)MD1 | |------------+---------------------------------------+--------------| | 12.4MDA | 12.4(22)MDA1 | 12.4(22)MDA1 | |------------+---------------------------------------+--------------| | 12.4MR | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4SW | Not Vulnerable | | |------------+---------------------------------------+--------------| | | | 12.4(20)T4 | | | 12.4(22)T2 | | | | | 12.4(22)T3 | | 12.4T | 12.4(20)T4 | | | | | 12.4(24)T2; | | | 12.4(24)T1 | Available on | | | | 23-OCT-2009 | |------------+---------------------------------------+--------------| | 12.4XA | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XB | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XC | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XD | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XE | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XF | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XG | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XJ | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XK | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XL | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XM | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XN | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XP | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XQ | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XR | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XT | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XV | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XW | Not Vulnerable | | |------------+---------------------------------------+--------------| | 12.4XY | Not Vulnerable | | |------------+---------------------------------------+--------------| | | | 12.4(20)T4 | | | | | | | | 12.4(22)T3 | | 12.4XZ | Vulnerable; first fixed in 12.4T | | | | | 12.4(24)T2; | | | | Available on | | | | 23-OCT-2009 | |------------+---------------------------------------+--------------| | | | 12.4(22)T3 | | | | | | 12.4YA | Vulnerable; first fixed in 12.4T | 12.4(24)T2; | | | | Available on | | | | 23-OCT-2009 | |------------+---------------------------------------+--------------| | 12.4YB | 12.4(22)YB4 | 12.4(22)YB4 | |------------+---------------------------------------+--------------| | 12.4YD | 12.4(22)YD1 | 12.4(22)YD1 | |------------+---------------------------------------+--------------| | 12.4YE | 12.4(22)YE1 | 12.4(22)YE1 | |------------+---------------------------------------+--------------| | 12.4YG | Not Vulnerable | | +-------------------------------------------------------------------+

Note: No Cisco IOS-XE or Cisco IOS Software Modularity releases are affected by this vulnerability.

Workarounds

There are no workarounds for this vulnerability other than disabling the Object Groups for ACLs feature.

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 vulnerability described in this advisory.

This vulnerability was found during internal testing.

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-20090923-acl.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 | | Initial | | 1.0 | 2009-September-23 | 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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. ----------------------------------------------------------------------

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TITLE: Cisco IOS Multiple Vulnerabilities

SECUNIA ADVISORY ID: SA36835

VERIFY ADVISORY: http://secunia.com/advisories/36835/

DESCRIPTION: Some vulnerabilities have been reported in Cisco IOS, which can be exploited by malicious people to cause a DoS (Denial of Service), bypass certain security restrictions, disclose sensitive information, or compromise a vulnerable device.

1) An error exists in the login section of the Extension Mobility feature of the Cisco Unified CME (Communications Manager Express) component. This can be exploited to cause a buffer overflow via specially crafted HTTP requests.

Successful exploitation may allow execution of arbitrary code.

2) An error in the IKE implementation can be exploited to allocate all available Phase 1 SAs and prevent new IPSec sessions from being established.

Successful exploitation requires that the IKE certificate based authentication method is used.

3) Multiple errors exist in the IP tunnelling implementation when switching network packets. These can be exploited to trigger a device reload via specially crafted packets.

Successful exploitation requires that the device is configured for PPTP, GRE, IPinIP, Generic Packet Tunneling in IPv6, or IPv6 over IP tunnels, and Cisco Express Forwarding.

5) An error in the H.323 implementation can be exploited to trigger a device reload via specially crafted TCP packets.

Successful exploitation requires that H.323 is enabled (disabled by default).

6) An error in the SIP implementation related to the Cisco Unified Border Element feature can be exploited to trigger a device reload.

For more information: SA36836

7) An error in the SSLVPN, SSH, and IKE Encrypted Nonces features can be exploited to reload a device via specially crafted packets sent to TCP ports 22 (for SSH) or 443 (for SSLVPN), or UDP ports 500 and 4500 (for IKE Encrypted Nonces).

8) A race condition error exists in the Authentication Proxy for HTTP(S), Web Authentication, and consent features. This can be exploited to bypass the authentication proxy services and the consent accept web page if a successfully authenticated session or accepted consent session exists.

9) An error exists in the Cisco IOS Zone-Based Policy Firewall SIP inspection feature. This can be exploited to reload a device via a specially crafted SIP transit packet.

10) An error exists in the NTPv4 implementation while creating NTP reply packets. This can be exploited to trigger a device reload via a specially crafted NTP packet.

SOLUTION: Update to a fixed version (please see the vendor's advisories for details).

PROVIDED AND/OR DISCOVERED BY: 1, 3-10) Reported by the vendor. 2) Reported to the vendor by a customer.

ORIGINAL ADVISORY: http://www.cisco.com/warp/public/707/cisco-sa-20090923-cme.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090923-ipsec.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090923-tunnels.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090923-acl.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090923-h323.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090923-sip.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090923-tls.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090923-auth-proxy.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090923-ios-fw.shtml http://www.cisco.com/warp/public/707/cisco-sa-20090923-ntp.shtml

OTHER REFERENCES: SA36836: http://secunia.com/advisories/36836/

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/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.) http://secunia.com/advisories/about_secunia_advisories/

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    "data": "The Object Groups for Access Control Lists (ACLs) feature in Cisco IOS 12.2XNB, 12.2XNC, 12.2XND, 12.4MD, 12.4T, 12.4XZ, and 12.4YA allows remote attackers to bypass intended access restrictions via crafted requests, aka Bug IDs CSCsx07114, CSCsu70214, CSCsw47076, CSCsv48603, CSCsy54122, and CSCsu50252. The problem is Bug ID : CSCsx07114, CSCsu70214, CSCsw47076, CSCsv48603, CSCsy54122 and CSCsu50252 It is a problem.A well-crafted request can circumvent access restrictions. Cisco IOS is prone to a security-bypass vulnerability. \nThis issue is documented by the following Cisco Bug IDs:\nCSCsx07114\nCSCsu70214\nCSCsw47076\nCSCsv48603\nCSCsy54122\nCSCsu50252. \nCisco has released free software updates that address this\nvulnerability. There are no workarounds for this vulnerability other\nthan disabling the Object Groups for ACLs feature. \n\nThis advisory is posted at:\n\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-acl.shtml\n\nNote: The September 23, 2009, Cisco IOS Security Advisory bundled\npublication includes eleven Security Advisories. Ten of the\nadvisories address vulnerabilities in Cisco IOS Software, and one\nadvisory addresses a vulnerability in Cisco Unified Communications\nManager. Each advisory lists the releases that correct the\nvulnerability or vulnerabilities detailed in the advisory. The\nfollowing table lists releases that correct all Cisco IOS Software\nvulnerabilities that have been published on September 23, 2009, or\nearlier. \n\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-bundle.shtml\n\nIndividual publication links are in \"Cisco Event Response: Semiannual\nCisco IOS Software Advisory Bundled Publication\" at the following\nlink:\n\nhttp://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep09.html\n\nAffected Products\n=================\n\nVulnerable Products\n+------------------\n\nAny Cisco device configured with ACLs using the object group feature\nand running an affected Cisco IOS software version is affected by\nthis vulnerability. \n\nNote: The Object Groups for ACLs feature was introduced in Cisco IOS\nsoftware version 12.4(20)T. \n\nTo verify whether object groups are configured in a Cisco IOS device,\nuse the \"show object-group\" command in user EXEC or privileged EXEC\nmode. The following example displays a sample output from the \"show\nobject-group\" command when object groups are configured:\n\n    Router# show object-group\n    Network object group my_host_group\n     host 172.18.104.123\n    \n    Service object group my_allowed_services\n     tcp eq www\n     tcp eq 443\n\nAlternatively, administrators can also use the \"show running config |\ninclude ^ (permit|deny) .*object-group\" command to verify whether\nobject groups are configured, as shown in the following example:\n\n    Router#show running-config | include ^ (permit|deny) .*object-group\n     permit object-group my_allowed_services host 10.10.1.1 host 10.20.1.1\n     permit tcp any object-group my_host_group eq 22\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 banner\nconfirms that the device is running Cisco IOS Software by displaying\ntext similar to \"Cisco Internetwork Operating System Software\" or\n\"Cisco IOS Software.\" The image name displays in parentheses,\nfollowed by \"Version\" and the Cisco IOS Software release name. Other\nCisco devices do not have the \"show version\" command or may provide\ndifferent 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    \n    !--- output truncated\n    \n\nThe following example identifies a Cisco product that is running\nCisco IOS Software Release 12.4(20)T with an installed 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    \n    !--- output truncated\n    \n\nProducts Confirmed Not Vulnerable\n+--------------------------------\n\nCisco devices that are not configured with object groups are not\nvulnerable. \n\nNo other Cisco products are currently known to be affected by this\nvulnerability. \n\nDetails\n=======\n\nIn Cisco IOS Software an object group can contain a single object\n(such as a single IP address, network, or subnet) or multiple objects\n(such as a combination of multiple IP addresses, networks, or\nsubnets). In an ACL that is based on an object group, administrators\ncan create a single access control entry (ACE) that uses an object\ngroup name instead of creating many ACEs, which each would require a\ndifferent IP address. A similar object group, such as a protocol port\ngroup, can be extended to limit access to a set of applications for a\nuser group to a server group. \n\nNote: The Object Groups for ACLs feature was introduced in Cisco IOS\nsoftware version 12.4(20)T. \n\nVulnerability Scoring Details\n=============================\n\nCisco has provided scores for the vulnerability 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\nCSCsx07114, CSCsu70214, CSCsw47076, CSCsv48603, CSCsy54122, CSCsu50252 -\nObject-group Access Control List Bypass\n\nCVSS Base Score - 4.3\n\nAccess Vector           - Network\nAccess Complexity       - Medium\nAuthentication          - None\nConfidentiality Impact  - Parital\nIntegrity Impact        - None\nAvailability Impact     - none\n\nCVSS Temporal Score - 3.6\n\nExploitability          - Functional\nRemediation Level       - Official-Fix\nReport Confidence       - Confirmed\n\nImpact\n======\n\nSuccessful exploitation of the vulnerability may allow an attacker to\naccess resources that should be protected by the Cisco IOS device. \n\nSoftware Versions and Fixes\n===========================\n\nWhen considering software upgrades, also consult:\n\nhttp://www.cisco.com/go/psirt\n\nand any subsequent advisories to determine exposure and a complete\nupgrade 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. 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 12.1 based releases.                        |\n|-------------------------------------------------------------------|\n|  Affected  |                                       | Recommended  |\n| 12.3-Based |          First Fixed Release          |   Release    |\n|  Releases  |                                       |              |\n|-------------------------------------------------------------------|\n| There are no affected 12.3 based releases.                        |\n|-------------------------------------------------------------------|\n|  Affected  |                                       | Recommended  |\n| 12.4-Based |          First Fixed Release          |   Release    |\n|  Releases  |                                       |              |\n|------------+---------------------------------------+--------------|\n| 12.4       | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n|            | Vulnerable; Contact your support      |              |\n| 12.4GC     | organization per the instructions in  |              |\n|            | Obtaining Fixed Software section of   |              |\n|            | this advisory                         |              |\n|------------+---------------------------------------+--------------|\n| 12.4JA     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4JDA    | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4JDC    | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4JDD    | 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|            |                                       | 12.4(11)MD9  |\n|            |                                       |              |\n| 12.4MD     | 12.4(22)MD1                           | 12.4(15)MD3  |\n|            |                                       |              |\n|            |                                       | 12.4(22)MD1  |\n|------------+---------------------------------------+--------------|\n| 12.4MDA    | 12.4(22)MDA1                          | 12.4(22)MDA1 |\n|------------+---------------------------------------+--------------|\n| 12.4MR     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4SW     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n|            |                                       | 12.4(20)T4   |\n|            | 12.4(22)T2                            |              |\n|            |                                       | 12.4(22)T3   |\n| 12.4T      | 12.4(20)T4                            |              |\n|            |                                       | 12.4(24)T2;  |\n|            | 12.4(24)T1                            | Available on |\n|            |                                       | 23-OCT-2009  |\n|------------+---------------------------------------+--------------|\n| 12.4XA     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XB     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XC     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XD     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XE     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XF     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XG     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XJ     | Not Vulnerable                        |              |\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     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XQ     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XR     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XT     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XV     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XW     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n| 12.4XY     | Not Vulnerable                        |              |\n|------------+---------------------------------------+--------------|\n|            |                                       | 12.4(20)T4   |\n|            |                                       |              |\n|            |                                       | 12.4(22)T3   |\n| 12.4XZ     | Vulnerable; first fixed in 12.4T      |              |\n|            |                                       | 12.4(24)T2;  |\n|            |                                       | Available on |\n|            |                                       | 23-OCT-2009  |\n|------------+---------------------------------------+--------------|\n|            |                                       | 12.4(22)T3   |\n|            |                                       |              |\n| 12.4YA     | Vulnerable; first fixed in 12.4T      | 12.4(24)T2;  |\n|            |                                       | Available on |\n|            |                                       | 23-OCT-2009  |\n|------------+---------------------------------------+--------------|\n| 12.4YB     | 12.4(22)YB4                           | 12.4(22)YB4  |\n|------------+---------------------------------------+--------------|\n| 12.4YD     | 12.4(22)YD1                           | 12.4(22)YD1  |\n|------------+---------------------------------------+--------------|\n| 12.4YE     | 12.4(22)YE1                           | 12.4(22)YE1  |\n|------------+---------------------------------------+--------------|\n| 12.4YG     | Not Vulnerable                        |              |\n+-------------------------------------------------------------------+\n\nNote: No Cisco IOS-XE or Cisco IOS Software Modularity releases are\naffected by this vulnerability. \n\nWorkarounds\n===========\n\nThere are no workarounds for this vulnerability other than disabling\nthe Object Groups for ACLs feature. \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:\n\nhttp://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html\n\nor as otherwise set forth at Cisco.com Downloads at:\n\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:\n\nhttp://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html\n\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 found during internal testing. \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-20090923-acl.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 |                   | Initial |\n| 1.0      | 2009-September-23 | 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:\n\nhttp://www.cisco.com/en/US/products/products_security_vulnerability_policy.html\n\nThis includes instructions for press inquiries regarding Cisco security\nnotices. All Cisco security advisories are available at:\n\nhttp://www.cisco.com/go/psirt\n-----BEGIN PGP SIGNATURE-----\n\niD8DBQFKukF586n/Gc8U/uARAuXEAJ99dU6Wi1fZMY1yNgedSCx4/+0p8wCeOSKF\nHmMwzq017QkqDzBFo/JH6DQ=\n=XJAG\n-----END PGP SIGNATURE-----\n\n. ----------------------------------------------------------------------\n\nDo you have VARM strategy implemented?\n\n(Vulnerability Assessment Remediation Management)  \n\nIf not, then implement it through the most reliable vulnerability\nintelligence source on the market. \n\nImplement it through Secunia. \n\nFor more information visit:\nhttp://secunia.com/advisories/business_solutions/\n\nAlternatively request a call from a Secunia representative today to\ndiscuss how we can help you with our capabilities contact us at:\nsales@secunia.com\n\n----------------------------------------------------------------------\n\nTITLE:\nCisco IOS Multiple Vulnerabilities\n\nSECUNIA ADVISORY ID:\nSA36835\n\nVERIFY ADVISORY:\nhttp://secunia.com/advisories/36835/\n\nDESCRIPTION:\nSome vulnerabilities have been reported in Cisco IOS, which can be\nexploited by malicious people to cause a DoS (Denial of Service),\nbypass certain security restrictions, disclose sensitive information,\nor compromise a vulnerable device. \n\n1) An error exists in the login section of the Extension Mobility\nfeature of the Cisco Unified CME (Communications Manager Express)\ncomponent. This can be exploited to cause a buffer overflow via\nspecially crafted HTTP requests. \n\nSuccessful exploitation may allow execution of arbitrary code. \n\n2)  An error in the IKE implementation can be exploited to allocate\nall available Phase 1 SAs and prevent new IPSec sessions from being\nestablished. \n\nSuccessful exploitation requires that the IKE certificate based\nauthentication method is used. \n\n3) Multiple errors exist in the IP tunnelling implementation when\nswitching network packets. These can be exploited to trigger a device\nreload via specially crafted packets. \n\nSuccessful exploitation requires that the device is configured for\nPPTP, GRE, IPinIP, Generic Packet Tunneling in IPv6, or IPv6 over IP\ntunnels, and Cisco Express Forwarding. \n\n5) An error in the H.323 implementation can be exploited to trigger a\ndevice reload via specially crafted TCP packets. \n\nSuccessful exploitation requires that H.323 is enabled (disabled by\ndefault). \n\n6) An error in the SIP implementation related to the Cisco Unified\nBorder Element feature can be exploited to trigger a device reload. \n\nFor more information:\nSA36836\n\n7) An error in the SSLVPN, SSH, and IKE Encrypted Nonces features can\nbe exploited to reload a device via specially crafted packets sent to\nTCP ports 22 (for SSH) or 443 (for SSLVPN), or UDP ports 500 and 4500\n(for IKE Encrypted Nonces). \n\n8) A race condition error exists in the Authentication Proxy for\nHTTP(S), Web Authentication, and consent features. This can be\nexploited to bypass the authentication proxy services and the consent\naccept web page if a successfully authenticated session or accepted\nconsent session exists. \n\n9) An error exists in the Cisco IOS Zone-Based Policy Firewall SIP\ninspection feature. This can be exploited to reload a device via a\nspecially crafted SIP transit packet. \n\n10) An error exists in the NTPv4 implementation while creating NTP\nreply packets. This can be exploited to trigger a device reload via a\nspecially crafted NTP packet. \n\nSOLUTION:\nUpdate to a fixed version (please see the vendor\u0027s advisories for\ndetails). \n\nPROVIDED AND/OR DISCOVERED BY:\n1, 3-10) Reported by the vendor. \n2) Reported to the vendor by a customer. \n\nORIGINAL ADVISORY:\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-cme.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-ipsec.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-tunnels.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-acl.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-h323.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-sip.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-tls.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-auth-proxy.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-ios-fw.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20090923-ntp.shtml\n\nOTHER REFERENCES:\nSA36836:\nhttp://secunia.com/advisories/36836/\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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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.