Vulnerability Alert

Cisco IOS Software Object Groups for Access Control Lists Security Bypass Vulnerability

 
Threat Type:CWE-287: Authentication Issues
IntelliShield ID:18876
Version:1
First Published:2009 September 23 16:11 GMT
Last Published:2009 September 23 16:11 GMT
Port: Not available
CVE:CVE-2009-2862
BugTraq ID:36495
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.6
 
Version Summary:

Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to bypass security restrictions and gain unauthorized access to protected networks.  Updates are available.

 
 
Description

Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to bypass security restrictions and gain unauthorized access to protected networks.

The vulnerability exists in the implementation of the Object Groups for Access Control Lists (ACLs) feature.  When this feature has been enabled, an unauthenticated, remote attacker could make crafted requests to the affected device to bypass security ACLs and gain unauthorized access to protected networks.

Cisco has confirmed this vulnerability and released software updates.

 
Warning Indicators

Cisco has published a list of affected Cisco IOS Software releases in the security advisory.  The Vendor Announcements section of this alert contains a link to the advisory.

 
IntelliShield Analysis

This vulnerability only affects devices that have been configured to use the Object Groups for ACLs feature.  More details on determining if this feature has been enabled are available in the vendor advisory.

Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.

 
Vendor Announcements

Cisco has released a security advisory to address Cisco bug IDs CSCsx07114, CSCsu70214, CSCsw47076, CSCsv48603, CSCsy54122 and CSCsu50252 at the following link: cisco-sa-20090923-acl

 
Impact

An unauthenticated, remote attacker could bypass security restrictions and gain unauthorized access to protected networks.

 
Technical Information

Additional technical information is not currently available.

 
Safeguards

Administrators are advised to apply the appropriate updates.

Administrators may consider disabling the Object Groups for ACLs feature.

Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.

 
Patches/Software

Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com.

 
Alert History
 

Initial Release



Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
N/A

Associated Products:
CiscoIOS 12.4GC 12.4(22)GC1 | 12.4MD 12.4(22)MD | 12.4MDA 12.4(22)MDA | 12.4MF 12.4(22)MF | 12.4T 12.4(20)T, 12.4(20)T1, 12.4(20)T2, 12.4(20)T3, 12.4(22)T, 12.4(22)T1, 12.4(24)T | 12.4XZ 12.4(15)XZ, 12.4(15)XZ1, 12.4(15)XZ2 | 12.4YA 12.4(20)YA, 12.4(20)YA1, 12.4(20)YA2, 12.4(20)YA3 | 12.4YB 12.4(22)YB, 12.4(22)YB1 | 12.4YD 12.4(22)YD | 12.4YE 12.4(22)YE




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LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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