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TITLE:
WebMod "Content-Length" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA24346

VERIFY ADVISORY:
http://secunia.com/advisories/24346/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
>From remote

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

DESCRIPTION:
Kevin Masterson (cybermind) has discovered a vulnerability in WebMod,
which potentially can be exploited by malicious people to compromise a
vulnerable system.

The vulnerability is caused due to a boundary error within the
"connectHandle()" function when processing the "Content-Length" HTTP
header. This can be exploited to cause a stack-based buffer overflow
by sending a specially crafted request to a vulnerable server.

Successful exploitation may allow execution of arbitrary code.

SOLUTION:
Restricted access to trusted people only.

PROVIDED AND/OR DISCOVERED BY:
Kevin Masterson (cybermind)

ORIGINAL ADVISORY:
http://cybermind.user.stfunoob.com/w48crash/

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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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Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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