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Category:   Application (Generic)  >   LessTif Vendors:
(LessTif Issues Fix) libXpm Integer and Stack Overflows May Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1011435
SecurityTracker URL:
CVE Reference:   CVE-2004-0687, CVE-2004-0688   (Links to External Site)
Date:  Sep 28 2004
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 0.93.96
Description:   Some vulnerabilities were reported in libXpm. A remote user may be able to execute arbitrary code on applications that use libXpm. LessTif is affected.

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:

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:

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:

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:   A fixed version (0.93.96) of LessTif is available. LessTif is affected by the libXpm vulnerability.

The fix is available at:

Cause:   Boundary error
Underlying OS:  Linux (Any), UNIX (Any)

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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