Pillow: BMP RLE decoder memory-amplification DoS via unbounded delta escape / absolute mode

[ Description ]Official description

Pillow is a Python imaging library. From 9.1.0 until 13.0.0, BmpRleDecoder.decode() in src/PIL/BmpImagePlugin.py permits crafted RLE BMP delta escapes and absolute-mode runs to append beyond the remaining dest_length without a per-branch cap. A delta can add roughly 255 image rows in one iteration, so a kilobyte-sized file with a large but permitted width can expand the data bytearray to hundreds of megabytes or more, causing memory-exhaustion denial of service. This issue is fixed in version 13.0.0.

[ Fixes ]Fixes and patches

• pillow 13.0.0Fixed version · GitHub Advisories · pip package pillow: upgrade to 13.0.0 or later (affected >= 9.1.0, < 13.0.0)

[ Packages ]Affected open-source packages

• pillow pipAffected >= 9.1.0, < 13.0.0 · fixed in 13.0.0 · GHSA-24rc-8hj2-v98c

[ References ]References

• github.com/python-pillow/Pillow/commit/e7794835e323ff2691d9b3a974cade1a44301b9a
• github.com/python-pillow/Pillow/pull/10015
• github.com/python-pillow/Pillow/releases/tag/13.0.0
• github.com/python-pillow/Pillow/security/advisories/GHSA-24rc-8hj2-v98c