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Category:   Application (Generic)  >   libpng Vendors:   libpng.sourceforge.net
libpng Buffer Overflow in png_set_strip_alpha() Lets Users Deny Service
SecurityTracker Alert ID:  1015615
SecurityTracker URL:  http://securitytracker.com/id/1015615
CVE Reference:   CVE-2006-0481   (Links to External Site)
Date:  Feb 13 2006
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.2.7 only
Description:   A vulnerability was reported in libpng. A user can cause denial of service conditions.

A user can create a specially crafted PNG image that, when processed by an application using libpng, may cause libpng to crash.

The vulnerability resides in the png_set_strip_alpha() function. The overflow is triggered when attempting to strip alpha channels out of the image.

Impact:   A user may be able to cause an application that uses libpng to crash.
Solution:   The vendor has issued a fixed version (1.2.8), available at:

http://sourceforge.net/project/showfiles.php?group_id=5624

Vendor URL:  libpng.sourceforge.net/ (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.
Feb 13 2006 (Red Hat Issues Fix) libpng Buffer Overflow in png_set_strip_alpha() Lets Users Deny Service
Red Hat has released a fix for Red Hat Enterprise Linux 4.



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