Buffer overflow in gif2png.c in gif2png 2.5.3 and earlier might allow context-dependent attackers to cause a denial of service (application crash) or have unspecified other impact via a GIF file that contains many images, leading to long extensions such as .p100 for PNG output files, as demonstrated by a CGI program that launches gif2png, a different vulnerability than CVE-2009-5018.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.