libpng 1.2.5 and earlier does not properly calculate certain buffer offsets, which could allow remote attackers to execute arbitrary code via a buffer overflow attack.

Buffer overflow in libpng 1.0.12-3.woody.2 and libpng3 1.2.1-1.1.woody.2 on Debian GNU/Linux 3.0, and other operating systems, may allow attackers to cause a denial of service and possibly execute arbitrary code, a different vulnerability than CVE-2002-0728.