[SA19984] Quake 3 Engine "remapShader" Command Buffer Overflow

TITLE:
Quake 3 Engine "remapShader" Command Buffer Overflow

SECUNIA ADVISORY ID:
SA19984

VERIFY ADVISORY:
http://secunia.com/advisories/19984/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Quake3 Engine 3.x
http://secunia.com/product/4653/

DESCRIPTION:
landser has reported a vulnerability in Quake 3 Engine, which
potentially can be exploited by malicious people to compromise a
user's system.

The vulnerability is caused due to a boundary error within the
handling of the "remapShader" command. This can be exploited to cause
a buffer overflow via specially crafted "remapShader" commands sent to
a client.

Successful exploitation may allow arbitrary code execution, but
requires that the user is e.g. tricked into connecting to a malicious
game server.

The vulnerability has been reported in the following software:

• ET 2.60.
• Return to Castle Wolfenstein 1.41.
• Quake III Arena 1.32b.

Other versions may also be affected.

SOLUTION:
Do not connect to non-trusted game servers.

PROVIDED AND/OR DISCOVERED BY:
landser

ORIGINAL ADVISORY:
http://www.milw0rm.com/exploits/1750

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