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TITLE:
0verkill Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA20551

VERIFY ADVISORY:
http://secunia.com/advisories/20551/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
0verkill 0.x
http://secunia.com/product/10425/

DESCRIPTION:
Federico Fazzi has discovered a vulnerability in 0verkill, which can
be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is cause due to an integer underflow error in
"recv_packet()" within the handling of a received UDP packet. This
can be exploited to cause out-of-bounds memory access which crashes
the server process via a UDP packet that is smaller than 12 bytes in
size.

The vulnerability has been confirmed in version 0.16. Other versions
may also be affected.

SOLUTION:
Host network games only when connected to trusted networks.

PROVIDED AND/OR DISCOVERED BY:
Federico Fazzi

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