TITLE:
CrossFire "SetUp()" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA19237

VERIFY ADVISORY:
http://secunia.com/advisories/19237/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
CrossFire 1.x
http://secunia.com/product/8396/

DESCRIPTION:
landser has discovered a vulnerability in CrossFire, which can be
exploited by malicious people to cause a DoS (Denial of Service) and
potentially to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the
"SetUp()" function in "request.c" when handling the "setup" command.
This can be exploited to cause a stack-based buffer overflow and may
allow arbitrary code execution via a specially-crafted "setup"
command sent to the server.

The vulnerability has been confirmed in version 1.9.0. Other versions
may also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
landser

ORIGINAL ADVISORY:
http://www.milw0rm.com/exploits/1582

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