Buffer overflow in the LWZReadByte function in IMG_gif.c in SDL_image before 1.2.7 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted GIF file, a similar issue to CVE-2006-4484. NOTE: some of these details are obtained from third party information.

More... (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2007-6697)