GHSA-9hx2-hgq2-2g4f

Regular Expression Denial of Service (ReDoS) in Pillow

Source: GitHub Advisory Database (reviewed) Moderate CVE-2021-25292

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	pillow	>= 5.1.0, < 8.1.1	8.1.1

Details

As written in the advisory (Markdown source, shown as plain text).

An issue was discovered in Pillow before 8.1.1. The PDF parser allows a regular expression DoS (ReDoS) attack via a crafted PDF file because of a catastrophic backtracking regex.

References

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2021-25292 advisory
https://github.com/python-pillow/Pillow/commit/3bce145966374dd39ce58a6fc0083f8d1890719c web
https://github.com/python-pillow/Pillow/commit/521dab94c7ab72b037bd9a83e9663401e0fd2cee web
https://github.com/python-pillow/Pillow/commit/6207b44ab1ff4a91d8ddc7579619876d0bb191a4 web
https://github.com/advisories/GHSA-9hx2-hgq2-2g4f advisory
https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-38.yaml web
https://github.com/python-pillow/Pillow web
https://pillow.readthedocs.io/en/stable/releasenotes/8.1.1.html web
https://security.gentoo.org/glsa/202107-33 web