Cisco VPN Client CVPNDRVA.sys IPSec driver denial of service

cisco-vpnclient-cvpndrva-dos (39694)

Medium Risk

Description:

The CISCO VPN Client is vulnerable to a denial of service, caused by an error in the IPSec driver. By sending a specially-crafted request containing less than 8+31 bytes to CVPNDRVA.sys, a local attacker could crash the system.

*CVSS:

Base Score:	4.9
Access Vector:	Local
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Complete
Temporal Score:	4.2
Exploitability:	Proof-of-Concept
Remediation Level:	Unavailable
Report Confidence:	Uncorroborated

Consequences:

Denial of Service

Remedy:

No remedy available as of May 1, 2013.

References:

• Cisco Web site: Cisco.
• BID-27289: Cisco VPN Client for Windows Local Denial of Service Vulnerability
• CVE-2008-0324: Cisco Systems VPN Client IPSec Driver (CVPNDRVA.sys) 5.0.02.0090 allows local users to cause a denial of service (crash) by calling the 0x80002038 IOCTL with a small size value, which triggers memory corruption.
• OSVDB ID: 40364: Cisco VPN Client IPSec CVPNDRVA.sys Driver Local DoS
• SA28472: Cisco VPN Client IPSec Driver Local Denial of Service
• SECTRACK ID: 1019240: Cisco VPN Client IOCTL Memory Corruption Error Lets Local Users Deny Service
• VUPEN/ADV-2008-0170: Cisco VPN Client CVPNDRVA.sys Local Denial of Service Vulnerability

Platforms Affected:

• Cisco VPN Client 5.0.02.0090

Reported:

Jan 15, 2008

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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