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TITLE:
X.Org X11 setuid Security Issues

SECUNIA ADVISORY ID:
SA21650

VERIFY ADVISORY:
http://secunia.com/advisories/21650/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
X Window System 11 (X11) 7.x
http://secunia.com/product/8806/
X Window System 11 (X11) 6.x
http://secunia.com/product/3913/

DESCRIPTION:
Some security issues have been reported in X.Org X11, which can be
exploited by malicious, local users to perform certain actions with
escalated privileges.

The security issues are caused due to missing checks whether the
setuid() or similar calls have succeeded. This can be exploited to
perform certain actions with root privileges if the calls fail due to
e.g. resource limits.

The security issues has been reported in versions 6.7.0 through
7.1.0. Other versions may also be affected.

SOLUTION:
Apply patches.

X.Org X11 6.8.2:
http://xorg.freedesktop.org/releases/X11R6.8.2/patches/

X.Org X11 6.9.0:
http://xorg.freedesktop.org/releases/X11R6.9.0/patches/

X.Org X11 7.0:
http://xorg.freedesktop.org/releases/X11R7.0/patches/

X.Org X11 7.1:
http://xorg.freedesktop.org/releases/X11R7.1/patches/

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Dirk Mueller and Marcus Meissner.

ORIGINAL ADVISORY:
http://lists.freedesktop.org/archives/xorg/2006-June/016146.html

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About:
This Advisory was delivered by Secunia as a free service to help
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Please Note:
Secunia recommends that you verify all advisories you receive by
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Secunia NEVER sends attached files with advisories.
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