Buffer overflow in Python Pillow
CVE-2021-34552
Pillow through 8.2.0 and PIL (aka Python Imaging Library) through 1.1.7 allow an attacker to pass controlled parameters directly into a convert function to trigger a buffer overflow in Convert.c.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.032 (87.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: +0.000
Affected products
- Python Pillow
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 33, 34
Weakness classification (CWE)
Public proof-of-concept exploits
References
- pillow.readthedocs.io/en/stable/releasenotes/index.html (Release Notes, Vendor Advisory)
- pillow.readthedocs.io/en/stable/releasenotes/8.3.0.html (Release Notes, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2021/07/msg00018.html (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202211-10 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-34552?
- CVE-2021-34552 is a critical-severity vulnerability in Python Pillow, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-07-13.
- How severe is CVE-2021-34552?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-34552 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.