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Gentoo Linux Security Advisory GLSA 200603-26
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http://security.gentoo.org/
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Severity: Normal
Title: bsd-games: Local privilege escalation in tetris-bsd
Date: March 29, 2006
Bugs: #122399
ID: 200603-26
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Synopsis
========
tetris-bsd is prone to local privilege escalation vulnerabilities.
Background
==========
bsd-games is a collection of NetBSD games ported to Linux.
Affected packages
=================
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Package / Vulnerable / Unaffected
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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@xxxxxxxxxx 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.
http://creativecommons.org/licenses/by-sa/2.0
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