ZDI-12-149 : Cisco AnyConnect VPN Client Verification Bypass Remote Code Execution Vulnerability



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ZDI-12-149 : Cisco AnyConnect VPN Client Verification Bypass Remote Code
Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-149
August 22, 2012

- -- CVE ID:
CVE-2012-2494

- -- CVSS:
9, AV:N/AC:L/Au:N/C:P/I:P/A:C

- -- Affected Vendors:
Cisco

- -- Affected Products:
Cisco AnyConnect VPN Client

- -- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Cisco AnyConnect VPN Client. User interaction
is required to exploit this vulnerability in that the target must visit a
malicious page or open a malicious file.

The specific flaw exists because the VPN AnyConnect helper program does not
check the version number of the vpndownloader.exe program it downloads. As
such it is possible to forcefully install an older version of the
vpndownloader.exe that is vulnerable to previously patched issues.

- -- Vendor Response:
Cisco has issued an update to correct this vulnerability. More details can
be found at:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-
sa-20120620-ac

- -- Disclosure Timeline:
2011-11-22 - Vulnerability reported to vendor
2012-08-22 - Coordinated public release of advisory

- -- Credit:
This vulnerability was discovered by:
* gwslabs.com

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