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TITLE:
WebMod "Content-Length" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA14302

VERIFY ADVISORY:
http://secunia.com/advisories/14302/

CRITICAL:
Highly critical

IMPACT:
System access, DoS

WHERE:
>From remote

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

DESCRIPTION:
Kevin Masterson has reported a vulnerability in the WebMod plugin for
Half-Life Dedicated Server, which can be exploited by malicious people
to cause a DoS (Denial of Service) or potentially compromise a
vulnerable system.

The vulnerability is caused due to a boundary error in the handling
of POST data in "server.cpp". This can be exploited to cause a
heap-based buffer overflow by supplying more POST data than the value
of the "Content-Length" HTTP header.

Successful exploitation may allow execution of arbitrary code.

The vulnerability has been confirmed in version 0.47. Prior versions
may also be affected.

SOLUTION:
Update to version 0.48.
http://djeyl.net/w.php

PROVIDED AND/OR DISCOVERED BY:
Kevin Masterson

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