An integer overflow in the PSD parser compnent of FastStone Image Viewer v8.3 allows attackers to execute arbitrary code or cause a Denial of Service (DoS) via supplying a crafted PSD file.

A heap overflow in the FSViewer.exe process of FastStone Image Viewer v8.3 allows attackers to cause a execute arbitrary code in the context of the current process via supplying a crafted JPEG 2000 (JP2) file.

A flaw has been found in FastStone Image Viewer up to 8.3. The affected element is an unknown function of the component TGA Image Handler. Executing a manipulation can lead to out-of-bounds write. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.