Stack-based buffer overflow in the loadit function in plug-ins/common/sphere-designer.c in the SPHERE DESIGNER plugin in GIMP 2.6.11 allows user-assisted remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a long "Number of lights" field in a plugin configuration file. NOTE: it may be uncommon to obtain a GIMP plugin configuration file from an untrusted source that is separate from the distribution of the plugin itself.
The product writes data past the end, or before the beginning, of the intended buffer.