Mandriva Linux Security Advisory 2009-051 – A number of vulnerabilities have been found and corrected in libpng. Fixed 1-byte buffer overflow in pngpread.c. This was allready fixed in Mandriva Linux 2009.0. Fix the function png_check_keyword() that allowed setting arbitrary bytes in the process memory to 0. Fix a potential DoS (Denial of Service) or to potentially compromise an application using the library. The updated packages have been patched to prevent this.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75121/MDVSA-2009-051.txt
Source: https://packetstormsecurity.com/files/75121/Mandriva-Linux-Security-Advisory-2009-051.html