Gentoo Linux Security Advisory GLSA 200603-26
Severity: Normal
Title: bsd-games: Local privilege escalation in tetris-bsd
Date: March 29, 2006
Bugs: #122399
ID: 200603-26
Synopsis
tetris-bsd is prone to local privilege escalation
vulnerabilities.
Background
bsd-games is a collection of NetBSD games ported to Linux.
Affected packages
Package / Vulnerable / Unaffected
1 games-misc/bsd-games < 2.17-r1 >= 2.17-r1
Description
Tavis Ormandy of the Gentoo Linux Security Audit Team discovered
that the checkscores() function in scores.c reads in the data from
the /var/games/tetris-bsd.scores file without validation, rendering
it vulnerable to buffer overflows and incompatible with the system
used for managing games on Gentoo Linux. As a result, it cannot be
played securely on systems with multiple users. Please note that
this is probably a Gentoo-specific issue.
Impact
A local user who is a member of group “games” may be able to
modify the tetris-bsd.scores file to trigger the execution of
arbitrary code with the privileges of other players.
Workaround
Do not add untrusted users to the “games” group.
Resolution
All bsd-games users are advised to update to the latest
version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=games-misc/bsd-games-2.17-r1"
Availability
This GLSA and any updates to it are available for viewing at the
Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200603-26.xml
Concerns?
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or
alternatively, you may file a bug at http://bugs.gentoo.org.
License
Copyright 2006 Gentoo Foundation, Inc; referenced text belongs
to its owner(s).
The contents of this document are licensed under the Creative
Commons – Attribution / Share Alike license.