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Cisco VPN Client Privilege Escalation Vulnerabilities

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Release Date:  2007-08-16    Last Update:  2011-07-08    Views:  16,617

Secunia Advisory SA26459

Where:

Local system

Impact:

Privilege escalation

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Some vulnerabilities have been reported in Cisco VPN Client, which can be exploited by malicious, local users to gain escalated privileges.

1) An error when using a VPN profile configured to use the Microsoft Dial-Up Networking Interface can be exploited to run arbitrary commands with the privileges of the LocalSystem account by enabling the "Start Before Logon" feature.

The vulnerability is reported in versions prior to 4.8.02.0010.

2) Incorrect permissions are set for cpvnd.exe during the Cisco VPN Client installation. This can be exploited by interactive users to run arbitary commands with the privileges of the LocalSystem account by replacing cvpnd.exe with an arbitrary file.

The vulnerability is reported in versions prior to 5.0.01.0600 and 64-bit version 5.0.7.0290.


Solution:
Update to a fixed version (please see the vendor's advisory for details).

Further details available to Secunia VIM customers

Provided and/or discovered by:
The vendor credits Dominic Beecher and Next Generation Security Software.

Original Advisory:
Cisco:
http://www.cisco.com/warp/public/707/cisco-sa-20070815-vpnclient.shtml

Next Generation Security Software:
http://www.ngssoftware.com/advisories/high-risk-vulnerability-in-cisco-vpn-client-cvpndexe/
http://archives.neohapsis.com/archives/bugtraq/2011-07/0035.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Cisco VPN Client Privilege Escalation Vulnerabilities

User Message
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kurfuer

RE: Cisco VPN Client Privilege Escalation Vulnerabilities
This reply has been deleted
kurfuer RE: Cisco VPN Client Privilege Escalation Vulnerabilities
Member 30th Mar, 2011 18:00
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Last edited on 30th Mar, 2011 18:00
Secunia tells me: "The version detected of Cisco VPN Client 5.x was 5.0.07.0410 while the latest version including one or more security fixes is 5.0.7.0440."
But the 0440 release is available only as 64bit version. I'm using a 32bit version, and the latest available release for 32bit is 0410.
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Anthony Wells RE: Cisco VPN Client Privilege Escalation Vulnerabilities
Expert Contributor 30th Mar, 2011 19:23
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User Since: 19th Dec 2007
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Last edited on 30th Mar, 2011 19:26
Your problem has already been raised in this thread :-

http://secunia.com/community/forum/thread/show/797...

As it is rather more a PSI detection problem , you would be best to follow the other thread

You will also need to take it up with Cisco as well .

Take care

Anthony

--


It always seems impossible until its done.
Nelson Mandela
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