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Category:   Application (Generic)  >   libXpm Vendors:   X.org
(Sun Issues Additional Fix for Solaris) libXpm Integer and Stack Overflows May Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1013930
SecurityTracker URL:  http://securitytracker.com/id/1013930
CVE Reference:   CVE-2004-0687, CVE-2004-0688   (Links to External Site)
Date:  May 11 2005
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): X11 R6.8.0
Description:   Some vulnerabilities were reported in libXpm. A remote user may be able to execute arbitrary code on applications that use libXpm.

The vendor reported that there are some integer overflows [CVE: CVE-2004-0687] and stack overflows [CVE: CVE-2004-0688] in the libXpm X Pixmap library, shipped as part of the X Window System.

A stack overflow is reported in xpmParseColors() in 'parse.c' that can be triggered by a specially crafted XPMv1 and XPMv2/3 file. A demonstration exploit file is available at:

http://scary.beasts.org/misc/doom.xpm

A stack overflow is reported in the reading of pixel values in the ParseAndPutPixels() function in 'create.c' and in the ParsePixels() function in 'parse.c'. A demonstration exploit file is available at:

http://scary.beasts.org/misc/doom2.xpm

An integer overflow is reported in the colorTable allocation in xpmParseColors() in 'parse.c'. The XpmCreateImageFromXpmImage, CreateXImage, ParsePixels, ParseAndPutPixels, and ParsePixels are affected.

The vendor credits Chris Evans with reporting these flaws. The advisory from Chris Evans is available at:

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

Impact:   A remote user can create a specially crafted image file that, when processed by an application using libXpm, will execute arbitrary code on the target system with the privileges of the target application.
Solution:   Sun has added a fix for Solaris 7. The following fixes are available:

Solaris Platform:

* Solaris 7 with patch 107081-57 or later
* Solaris 8 with patch 108940-68 or later
* Solaris 9 with patch 112771-23 or later

x86 Platform

* Solaris 7 with patch 107082-57 or later
* Solaris 8 with patch 108941-68 or later
* Solaris 9 with patch 113867-18 or later

Linux Platform

* Sun Java Desktop System (JDS) 2003 with the updated RPMs (patch-9400)
* Sun Java Desktop System (JDS) Release 2 with the updated RPMs (patch-9400)

Vendor URL:  sunsolve.sun.com/search/document.do?assetkey=1-26-57653-1 (Links to External Site)
Cause:   Boundary error
Underlying OS:  UNIX (Solaris - SunOS)
Underlying OS Comments:  7, 8, and 9

Message History:   This archive entry is a follow-up to the message listed below.
Sep 16 2004 libXpm Integer and Stack Overflows May Let Remote Users Execute Arbitrary Code



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