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Category:   Application (Generic)  >   libpng Vendors:   libpng.sourceforge.net
libpng PNG tRNS Chunk Processing Error Lets Remote Users Deny Service
SecurityTracker Alert ID:  1018078
SecurityTracker URL:  http://securitytracker.com/id/1018078
CVE Reference:   CVE-2007-2445   (Links to External Site)
Date:  May 17 2007
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.90 through 1.2.16
Description:   A vulnerability was reported in libpng. A remote user can cause denial of service conditions.

A remote user can create a PNG image with a specially crafted tRNS chunk that, when loaded by the target user, will cause the target application to crash.

The vendor indicates that it is not known whether arbitrary code execution is possible or not.

The vulnerability resides in 'pngrutil.c'.

Impact:   A remote user can create a PNG image that, when loaded by the target user, will cause the target application to crash.
Solution:   The vendor has issued fixed versions (1.0.25 and 1.2.17). A patch is also available in the vendor's advisory.

The libpng advisory is available at:

http://downloads.sourceforge.net/libpng/libpng-1.2.18-ADVISORY.txt

Vendor URL:  downloads.sourceforge.net/libpng/libpng-1.2.18-ADVISORY.txt (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
May 18 2007 (Red Hat Issues Fix) libpng PNG tRNS Chunk Processing Error Lets Remote Users Deny Service
Red Hat has released a fix for Red Hat Enterprise Linux 2.1, 3, 4, and 5.
Jun 29 2007 (Sun Issues Fix) libpng PNG tRNS Chunk Processing Error Lets Remote Users Deny Service
Sun has issued a fix for Solaris 10.



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