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TITLE:
WebMod "auth.w" Cross-Site Scripting Vulnerability

SECUNIA ADVISORY ID:
SA27245

VERIFY ADVISORY:
http://secunia.com/advisories/27245/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
WebMod 0.x (Half-Life Dedicated Server plugin)
http://secunia.com/product/4666/

DESCRIPTION:
Nemessis has reported a vulnerability in WebMod, which can be
exploited by malicious people to conduct cross-site scripting
attacks.

Input passed to the "redir" parameter in auth.w is not properly
sanitised before being returned to the user. This can be exploited to
execute arbitrary HTML and script code in a user's browser session in
context of an affected site.

The vulnerability is reported in version 0.48. Other versions may
also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
Nemessis

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