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Category:   Application (Generic)  >   libpng Vendors:   libpng.sourceforge.net
Libpng 'pngrtran' Offset Buffer Overflow May Let Remote Users Deny Service or Execute Code Via Affected Applications
SecurityTracker Alert ID:  1010548
SecurityTracker URL:  http://securitytracker.com/id/1010548
CVE Reference:   CAN-2002-1363   (Links to External Site)
Date:  Jun 21 2004
Impact:   Denial of service via network, Execution of arbitrary code via network

Version(s): 1.2.5
Description:   A buffer overflow vulnerability was reported in libpng. A remote user may be able to cause an application that uses the affected library code to crash or execute arbitrary code.

In May 2004, the vendor reported that libpng does not properly calculate certain offsets.

The flaw resides in 'pngrtran.c'.

Impact:   A remote user may be able to cause an application that uses the affected library code to crash or execute arbitrary code. The specific impact depends on the application that uses the affected library.
Solution:   The vendor has issued a patch for version 1.2.5:

http://www.libpng.org/pub/png/src/libpng-1.2.5-patch2-pngrtran.CAN-2002-1363.diff

Vendor URL:  www.libpng.org/pub/png/libpng.html (Links to External Site)
Cause:   Boundary error
Underlying OS:   Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Aug 4 2004 (Red Hat Issues Fix for RHEL) Libpng 'pngrtran' Offset Buffer Overflow May Let Remote Users Deny Service or Execute Code Via Affected Applications   (bugzilla@redhat.com)
Red Hat has released a fix for Red Hat Enterprise Linux 2.1 and 3.
Aug 4 2004 (Fedora Issues Fix for FC1) Libpng 'pngrtran' Offset Buffer Overflow May Let Remote Users Deny Service or Execute Code Via Affected Applications   (Matthias Clasen <mclasen@redhat.com>)
Red Hat has released a fix for Fedora Core 1.
Aug 5 2004 (Fedora Issues Fix for libpng10) Libpng 'pngrtran' Offset Buffer Overflow May Let Remote Users Deny Service or Execute Code Via Affected Applications   (Matthias Clasen <mclasen@redhat.com>)
Fedora has released a fix for libpng10 on Fedora Core 2.
Aug 10 2004 (Apple Issues Fix) Libpng 'pngrtran' Offset Buffer Overflow May Let Remote Users Deny Service or Execute Code Via Affected Applications   (Apple Product Security <product-security@apple.com>)
Apple has released a fix for Mac OS X in 10.3.5.
Aug 10 2004 (Apple Issues Fix) Libpng 'pngrtran' Offset Buffer Overflow May Let Remote Users Deny Service or Execute Code Via Affected Applications   (Apple Product Security <product-security@apple.com>)
Apple has released a fix for Mac OS X 10.2.8 and 10.3.4.



 Source Message Contents

Date:  Sun, 20 Jun 2004 13:42:28 -0400
Subject:  CAN-2002-1363


http://www.libpng.org/pub/png/libpng.html

Patch for 1.2.5:

http://www.libpng.org/pub/png/src/libpng-1.2.5-patch2-pngrtran.CAN-2002-1363.diff

CVE: CAN-2002-1363

 > Portable Network Graphics (PNG) libraries (1) libpng 1.2.1 and earlier, and (2) libpng3
 > 1.2.5 and earlier, do not correctly calculate offsets, which allows remote attackers to
 > cause a denial of service (crash) and possibly execute arbitrary code via a buffer
 > overflow attack on the row buffers.

 
 


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