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TITLE:
Cisco WebVPN Cross-Site Scripting Vulnerability

SECUNIA ADVISORY ID:
SA20644

VERIFY ADVISORY:
http://secunia.com/advisories/20644/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

OPERATING SYSTEM:
Cisco Adaptive Security Appliance (ASA) 7.x
http://secunia.com/product/6115/
Cisco VPN 3000 Concentrator
http://secunia.com/product/90/

DESCRIPTION:
A vulnerability has been reported in Cisco WebVPN, which can be
exploited by malicious people to conduct cross-site scripting
attacks.

Input passed in the URL isn't properly sanitised before being
returned to the user in the "dnserror.html" and the
"connecterror.html" pages. This can be exploited to execute arbitrary
HTML and script code in a user's browser session in context of an
affected site.

Successful exploitation requires that clientless mode of the WebVPN
feature is enabled.

The vulnerability has been reported in the following products:
* Cisco VPN 3000 Series Concentrators
* Cisco ASA 5500 Series Adaptive Security Appliances (ASA).

SOLUTION:
Filter malicious characters and character sequences in a proxy or
firewall with URL filtering capabilities.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Michal Zalewski and two other users.

ORIGINAL ADVISORY:
http://lists.grok.org.uk/pipermail/full-disclosure/2006-June/046708.html

Cisco:
http://www.cisco.com/warp/public/707/cisco-sr-20060613-webvpn-xss.shtml

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About:
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