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Vulnerability Alert

Cisco VPN Client Denial of Service Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:27926
Version:2
First Published:2013 January 22 16:47 GMT
Last Published:2013 March 14 19:01 GMT
Port: Not available
CVE:CVE-2012-5429
BugTraq ID:57483
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:4.6 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:4.1
 
 
Version Summary:IntelliShield has updated this alert to include affected versions of Cisco VPN Client software.
 
 
Description
Cisco VPN Client contains a vulnerability that could allow an authenticated, local attacker to cause a denial of service (DoS) condition on a targeted system.

The vulnerability is due to improper interaction between the VPN driver and the operating system kernel on a device running the vulnerable software. A local attacker could exploit the vulnerability by running a crafted program designed to submit malicious input to the vulnerable system. Processing the malicious input could cause the host operating system to crash, resulting in a DoS condition.

Proof-of-concept code that exploits this vulnerability is publicly available.

Cisco has confirmed this vulnerability; however, software updates are not available.
 
Warning Indicators
Cisco VPN Client versions 5.0.07.0440 and prior are vulnerable.
 
IntelliShield Analysis
As of July 30, 2012, Cisco VPN Client reached the End of Software Maintenance. Customers running the vulnerable software are advised to upgrade to Cisco AnyConnect Secure Mobility Client.
 
Vendor Announcements
Cisco has released a security notice for Cisco bug ID CSCuc81669 at the following link: CVE-2012-5429
 
Impact
An authenticated, local attacker could exploit this vulnerability to cause the targeted system to crash, resulting in a DoS condition.
 
Technical Information
The vulnerability is due to improper interaction between the VPN driver and the operating system kernel on a device running the vulnerable software.

An authenticated, local attacker could exploit the vulnerability by running a crafted program designed to submit malicious input to the vulnerable system. Processing the malicious input could cause the host operating system to crash, resulting in a DoS condition.
 
Safeguards
Administrators are advised to upgrade from Cisco VPN Client to Cisco AnyConnect Secure Mobility Client.

Administrators are advised to allow only trusted users to access local systems.

Administrators are advised to monitor affected systems.
 
Patches/Software
Patches and software updates are not available.
 
Alert History
 
Version 1, January 22, 2013, 7:47 AM: Cisco VPN Client contains a vulnerability that could allow an authenticated, local attacker to cause a denial of service condition on a targeted system. Updates are not available.


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

Primary Products:
CiscoCisco VPN Client for Windows 2.0 Base | 3.0 Base, .5 | 3.1 Base, .1, .2, .4 | 3.5.1 Base | 3.5.1.a Base | 3.5.1.b Base | 3.5.1.c Base | 3.5.1.e Base | 3.5.2 Base | 3.5.2.a Base | 3.5.2.b Base | 3.5.2.c Base | 3.5.3 Base | 3.5.4 Base | 3.6 Base | 3.6.1 Base | 3.6.2 Base | 3.6.2.a Base | 3.6.2.b Base | 3.6.3 Base | 3.6.3.b Base | 3.6.3.c Base | 3.6.4 Base | 3.6.4.a Base | 3.6.5 Base | 3.7 Base | 4.0 Base | 4.0.1 Base | 4.0.2 Base, .A, .B, .C, .D, .E | 4.0.3 Base, .A, .B, .C, .D, .E, .F | 4.0.4 Base, .B, .D | 4.0.5 Base, k9, .A, .B, .C, .D | 4.6.00 Base, .0045, .0049 | 4.6.04 Base | 4.7.00 Base | 4.8.00 Base, .0440, .0490 | 4.8.01 Base | 4.8.02 Base, .0010 | 4.9 Base | 5.0.00 Base, .340 | 5.0.01 Base, .0600 | 5.0.02 Base, .0090 | 5.0.03.0530 Base | 5.0.03.0560 Base | 5.0.04.0300 Base | 5.0.05.0290 Base | 5.0.06.0110 Base | 5.0.07.0290 Base | 5.0.07.0410 Base | 5.0.07.0440 Base

Associated Products:
N/A




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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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