From: Secunia Security Advisories (sec-advsecunia.com)
Date: Thu Sep 16 2004 - 08:25:56 CDT

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TITLE:
X11 libXpm XPM Image Decoding Vulnerabilities

SECUNIA ADVISORY ID:
SA12549

VERIFY ADVISORY:
http://secunia.com/advisories/12549/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
From remote

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

DESCRIPTION:
Chris Evans has reported multiple vulnerabilities in libXpm, which
potentially can be exploited by malicious people to compromise a
vulnerable system.

1) A boundary error within the "xpmParseColors()" function can be
exploited to cause a stack-based buffer overflow when a specially
crafted XPM file is processed.

Successful exploitation may potentially allow execution of arbitrary
code.

2) Various input validation errors can be exploited to cause integer
overflows when a specially crafted XPM file is processed.

Successful exploitation causes an affected application to crash and
may potentially also allow arbitrary code execution.

SOLUTION:
Update to version 6.8.1 or apply patch.

Patch for version 6.8.0.
http://www.x.org/pub/X11R6.8.0/patches/xorg-CAN-2004-0687-0688.patch

PROVIDED AND/OR DISCOVERED BY:
Chris Evans

ORIGINAL ADVISORY:
X.Org:
http://www.x.org/pub/X11R6.8.0/patches/README.xorg-CAN-2004-0687-0688.patch

Chris Evans:
http://scary.beasts.org/security/CESA-2004-003.txt

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