TITLE:
cPanel Entropy Chat Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA16609

VERIFY ADVISORY:
http://secunia.com/advisories/16609/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
cPanel 10.x
http://secunia.com/product/5280/

DESCRIPTION:
Secunia Research has discovered a vulnerability in cPanel, which can
be exploited by malicious people to conduct script insertion
attacks.

Input passed to the chat message field in the pre-installed Entropy
Chat script isn't properly sanitised before being used. This can be
exploited to inject arbitrary script code, which will be executed in
a user's browser session in context of an affected site when the
malicious user data is viewed with the Microsoft Internet Explorer
browser.

Example:
Send message <b style="width:expression([code])">text</b> via
http://[host]:2084/

The vulnerability has been confirmed in versions 10.2.0-R82 and
10.6.0-R137. Other versions may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
Andreas Sandblad, Secunia Research

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2005-56/advisory/

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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