CVE-2021-34552
CRITICALCVSS 9.8/10EPSS 3.16%
Last modified
CVE-2021-34552 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 3.16% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Python | Pillow | >= 1.0, <= 1.1.7 |
| Python | Pillow | >= 1.2, <= 8.2.0 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
References
- https://lists.debian.org/debian-lts-announce/2021/07/msg00018.htmlMailing List, Third Party Advisory
- https://pillow.readthedocs.io/en/stable/releasenotes/8.3.0.html#buffer-overflowRelease Notes, Vendor Advisory
- https://pillow.readthedocs.io/en/stable/releasenotes/index.htmlRelease Notes, Vendor Advisory
- https://security.gentoo.org/glsa/202211-10Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00018.htmlMailing List, Third Party Advisory
- https://pillow.readthedocs.io/en/stable/releasenotes/8.3.0.html#buffer-overflowRelease Notes, Vendor Advisory
- https://pillow.readthedocs.io/en/stable/releasenotes/index.htmlRelease Notes, Vendor Advisory
- https://security.gentoo.org/glsa/202211-10Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-34552?
CVE-2021-34552 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.16% probability of exploitation in the next 30 days.
How do I fix CVE-2021-34552?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-34552?
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Scan your code nowSource: NVD / NIST