Vulnerability in Python Pillow
CVE-2021-28676
An issue was discovered in Pillow before 8.2.0. For FLI data, FliDecode did not properly check that the block advance was non-zero, potentially leading to an infinite loop on load.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.025 (84.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: -0.000
Affected products
- Python Pillow
- Fedoraproject Fedora — versions 33
Weakness classification (CWE)
Public proof-of-concept exploits
References
- pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html (Third Party Advisory, Release Notes)
- github.com/python-pillow/Pillow/pull/5377 (Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List)
- security.gentoo.org/glsa/202107-33 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/07/msg00018.html (mailing-list, Third Party Advisory)
- github.com/python-pillow/Pillow/commit/bb6c11fb889e6c11b0ee122b828132ee763b5856 (Patch)
Frequently asked questions
- What is CVE-2021-28676?
- CVE-2021-28676 is a high-severity vulnerability in Python Pillow, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2021-06-02.
- How severe is CVE-2021-28676?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-28676 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.