CVE-2020-25665

The PALM image coder at coders/palm.c makes an improper call to
AcquireQuantumMemory() in routine WritePALMImage() because it needs to be
offset by 256. This can cause a out-of-bounds read later on in the routine.
The patch adds 256 to bytes_per_row in the call to AcquireQuantumMemory().
This could cause impact to reliability. This flaw affects ImageMagick
versions prior to 7.0.8-68.

Bugs

• <https://github.com/ImageMagick/ImageMagick/issues/1714&gt;