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Cisco VPN Client Privilege Escalation Vulnerability
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Secunia Advisory:
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SA20261
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Release Date:
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2006-05-25
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Last Update:
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2006-07-28
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Popularity:
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10,781 views
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Critical:
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Less critical
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Impact:
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Privilege escalation
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Where:
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Local system
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Solution Status:
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Vendor Patch
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| Software: | Cisco VPN Client 2.x
Cisco VPN Client 3.x
Cisco VPN Client 4.x
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Instant alerts on relevant vulnerabilities 
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| | CVE reference: | CVE-2006-2679
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Description:
A vulnerability has been reported in Cisco VPN Client, which can be exploited by malicious, local users to gain escalated privileges on a vulnerable system.
The vulnerability is caused due to an error in the GUI (also known as the "VPN client dialer") in combination with the "Start Before Logon" feature, which can be enabled by unprivileged users. This can be exploited to execute arbitrary commands with SYSTEM privileges.
The vulnerability has been reported in versions 2.x, 3.x, 4.0.x, 4.6.x, 4.7.x (except version 4.7.00.0533), and 4.8.00.x for Windows.
Solution:
Update to version 4.8.01.0300.
http://www.cisco.com/pcgi-bin/tablebuild.pl/windows
Prevent the Local System account from launching the application associated with files with the .html extension (see original advisory).
Provided and/or discovered by:
The vendor credits:
* Andrew Christensen, FortConsult.
* Johan Ronkainen
Changelog:
2006-06-07: Added CVE reference.
2006-07-28: Updated "Description" and "Solution" section. Added additional information provided by the vendor.
Original Advisory:
http://www.cisco.com/warp/public/707/cisco-sa-20060524-vpnclient.shtml
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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