Advisories for Pypi/Psd-Tools package

A security review of the psd_tools.compression module (conducted against the fix/invalid-rle-compression branch, commits 7490ffa–2a006f5) identified the following pre-existing issues. The two findings introduced and fixed by those commits (Cython buffer overflow, IndexError on lone repeat header) are excluded from this report.

An issue was discovered in psd-tools before 1.9.4. The Cython implementation of RLE decoding did not check for malformed PSD input data during decoding to the PIL.Image or NumPy format, leading to a Buffer Overflow.