TITLE:
Gentoo bsd-games Privilege Escalation Vulnerability

SECUNIA ADVISORY ID:
SA19442

VERIFY ADVISORY:
http://secunia.com/advisories/19442/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

OPERATING SYSTEM:
Gentoo Linux 1.x
http://secunia.com/product/339/

DESCRIPTION:
Tavis Ormandy has reported some vulnerabilities in the bsd-games
package, which potentially can be exploited by malicious, local users
to gain escalated privileges.

The vulnerabilities are caused due to boundary errors when reading
the player's name and level information from the
"/var/games/tetris-bsd.scores" file. This can be exploited by users
in the "games" group to cause a stack-based buffer overflow when
other users run the game, by modifying entries in the file.

Successful exploitation allows the execution of arbitrary code with
the privileges of other users.

SOLUTION:
Update to "games-misc/bsd-games-2.17-r1" or later.

PROVIDED AND/OR DISCOVERED BY:
Tavis Ormandy, Gentoo Linux Security Audit Team.

ORIGINAL ADVISORY:
http://www.gentoo.org/security/en/glsa/glsa-200603-26.xml

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