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Advisories, March 29, 2006

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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


tetris-bsd is prone to local privilege escalation vulnerabilities.


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


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.


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.


Do not add untrusted users to the "games" group.


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"


This GLSA and any updates to it are available for viewing at the Gentoo Security Website:


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 or alternatively, you may file a bug at


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.