Doomsday: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200802-02 / doomsday
Release Date	February 06, 2008
Latest Revision	February 10, 2008: 02
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
games-fps/doomsday	<= 1.9.0_beta52	*	All supported architectures

Warning: *: Needs to be manually updated

Related bugreports: #190835

Synopsis

Multiple vulnerabilities in Doomsday might allow remote execution of arbitrary code or a Denial of Service.

2. Impact Information

Background

The Doomsday Engine (deng) is a modern gaming engine for popular ID games like Doom, Heretic and Hexen.

Description

Luigi Auriemma discovered multiple buffer overflows in the D_NetPlayerEvent() function, the Msg_Write() function and the NetSv_ReadCommands() function. He also discovered errors when handling chat messages that are not NULL-terminated (CVE-2007-4642) or contain a short data length, triggering an integer underflow (CVE-2007-4643). Furthermore a format string vulnerability was discovered in the Cl_GetPackets() function when processing PSV_CONSOLE_TEXT messages (CVE-2007-4644).

Impact

A remote attacker could exploit these vulnerabilities to execute arbitrary code with the rights of the user running the Doomsday server or cause a Denial of Service by sending specially crafted messages to the server.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

While some of these issues could be resolved in "games-fps/doomsday-1.9.0-beta5.2", the format string vulnerability (CVE-2007-4644) remains unfixed. We recommend that users unmerge Doomsday:

Code Listing 3.1: Resolution

# emerge --unmerge games-fps/doomsday

4. References

Page updated February 06, 2008

Summary: This is a Gentoo Linux Security Advisory

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