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Cisco VPN Client Denial of Service Vulnerability

Cisco-SA-20130122-CVE-2012-5429 · Medium · Published · Updated

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. 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.

Cisco advisory · CSAF JSON

Workarounds

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.

CVEsCVE-2012-5429
Cisco Bug IDsCSCuc81669
CVSS ScoreBase 4.6
Base 4.6 AV:L/AC:L/Au:S/C:N/I:N/A:C/E:POC/RL:U/RC:C
Product Names From Source
Cisco VPN Client for Windows

Related Products

Product CVE Evidence
Cisco VPN Client for Windows CVE-2012-5429 Cisco OpenVuln
Cisco AnyConnect Secure Mobility Client CVE-2012-5429 Cisco OpenVuln