Division by zero vulnerability was found in cvtRaster function in rgb2ycybr.c, allowing attacker to cause a denial of service via a crafted TIFF image.
Name: Mei Wang (Qihoo 360)
The division by zero (which is hardly a security issue already) is caused by passing the zero/0 as a command line parameter. I can't think of a reasonable scenario where this would be any different from shooting yourself in the foot. Thus, I'm not convinced of the security impact.
Red Hat Product Security determined that this flaw was not a security vulnerability. See the Bugzilla link for more details.