libpng pngwutil.c NULL pointer Vulnerability

Summary
The host has libpng installed and is prone to memory overwrite vulnerability.
Impact
Successful remote exploitation could result in arbitrary code execution on the affected system. Impact Level: Application
Solution
Upgrade to libpng 1.0.42 or 1.2.34, http://libpng.sourceforge.net/index.html
Insight
Attackers can set the value of arbitrary memory location to zero via vectors involving creation of crafted PNG files with keywords, related to an implicit cast of the '\0' character constant to a NULL pointer.
Affected
libpng 1.0.41 and prior and 1.2.x to 1.2.33 on Linux.
References