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. Public via: http://seclists.org/oss-sec/2016/q2/27
Acknowledgments: 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.
External References: http://bugzilla.maptools.org/show_bug.cgi?id=2569
Statement: Red Hat Product Security determined that this flaw was not a security vulnerability. See the Bugzilla link for more details.