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Cisco VPN 3000 Concentrator FTP Management Vulnerabilities
Secunia Advisory: SA21617
Release Date: 2006-08-24
Last Update: 2006-08-25
Popularity: 9,301 views

Critical:
Less critical
Impact: Security Bypass
Where: From local network
Solution Status: Vendor Patch

OS:Cisco VPN 3000 Concentrator

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CVE reference:CVE-2006-4313


Description:
Two vulnerabilities have been reported in Cisco VPN 3000 Concentrator, which can be exploited by malicious people to bypass certain security restrictions.

The vulnerabilities are caused due to unspecified errors when using FTP as a management protocol and can be exploited to run the "CWD", "MKD", "CDUP", "RNFR", "SIZE", and "RMD" commands without being authenticated. This can e.g. be exploited to delete configuration files and certificates on the device.

Successful exploitation requires that the device has been configured to use FTP as a management protocol (default setting).

The vulnerabilities affect models 3005, 3015, 3020, 3030, 3060, and 3080 running the following versions:
* Any version prior to 4.1
* Any 4.1.x version prior to, and including, 4.1(7)L
* Any 4.7.x version prior to, and including, 4.7(2)F

Solution:
Update to version 4.1(7)M or 4.7(2)G.
http://www.cisco.com/pcgi-bin/tablebuild.pl/vpn3000-3des?psrtdcat20e2

Network security best practises recommend restricting access to the FTP service (or disabling it if not needed to manage the VPN 3000 concentrator).

Provided and/or discovered by:
The vendor credits NCC Group.

Changelog:
2006-08-25: Added CVE reference.

Original Advisory:
http://www.cisco.com/warp/public/707/cisco-sa-20060823-vpn3k.shtml


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