GLSA 200603-26 bsd-games: Local privilege escalation in tetris-bsd

Posted by Bob on: 03/29/2006 08:42 PM [ Print | 0 comment(s) ]

A new security update has been released for Gentoo Linux - bsd-games: Local privilege escalation in tetris-bsd. Here the announcement:

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
-------------------------------------------------------------------
1 games-misc/bsd-games lt; 2.17-r1 gt;= 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 "gt;=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.

http://creativecommons.org/licenses/by-sa/2.0