Multiple heap-based buffer overflows in imlib2 1.4.3 allow context-dependent attackers to execute arbitrary code via a crafted (1) ARGB, (2) XPM, or (3) BMP file, related to the IMAGE_DIMENSIONS_OK macro in lib/image.h.
http://www.vupen.com/english/advisories/2010/0959
http://www.securityfocus.com/archive/1/510866/100/0/threaded