PyPI: pillow
CVE-2021-28676
Safety vulnerability ID: SFTY-20210602-93390
Safety legacy ID: pyup.io-40594
Pillow version 8.2.0 includes a fix for CVE-2021-28676: For FLI data, FliDecode did not properly check that the block advance was non-zero, potentially leading to an infinite loop on load. https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/ https://github.com/python-pillow/Pillow/pull/5377 https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28676-fix-fli-dos
Overview
Potential infinite loop in Pillow
Advisory
Pillow version 8.2.0 includes a fix for CVE-2021-28676: For FLI data, FliDecode did not properly check that the block advance was non-zero, potentially leading to an infinite loop on load. https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/ https://github.com/python-pillow/Pillow/pull/5377 https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28676-fix-fli-dos
How to Fix
Mitigation and Workarounds
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Vulnerable Functions
Functions linked to known vulnerabilities.
References
- https://getsafety.com/vulnerabilities/SFTY-20210602-93390/CVE-2021-28676
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28676
- https://github.com/python-pillow/Pillow/commit/bb6c11fb889e6c11b0ee122b828132ee763b5856
- https://github.com/python-pillow/Pillow/pull/5377
- https://lists.debian.org/debian-lts-announce/2021/07/msg00018.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQHA5
- https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28676-fix-fli-dos
- https://security.gentoo.org/glsa/202107-33
- https://nvd.nist.gov/vuln/detail/CVE-2021-28676
- https://github.com/python-pillow/Pillow/pull/5377
- https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28676-fix-fli-dos
- https://security.gentoo.org/glsa/202107-33
- https://lists.debian.org/debian-lts-announce/2021/07/msg00018.html
- https://github.com/python-pillow/Pillow/commit/bb6c11fb889e6c11b0ee122b828132ee763b5856
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL
- https://github.com/advisories/GHSA-7r7m-5h27-29hp
- https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-92.yaml
Verified by Safety
Our Cybersecurity Intelligence Team reviewed this vulnerability. We combine public data with our own research to find issues not yet reported to public sources.
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