CVE-2020-21041
HIGHCVSS 7.5/10EPSS 2.05%
Last modified
CVE-2020-21041 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Buffer Overflow vulnerability exists in FFmpeg 4.1 via apng_do_inverse_blend in libavcodec/pngenc.c, which could let a remote malicious user cause a Denial of Service. EPSS estimates a 2.05% chance of exploitation in the next 30 days.
Description
Buffer Overflow vulnerability exists in FFmpeg 4.1 via apng_do_inverse_blend in libavcodec/pngenc.c, which could let a remote malicious user cause a Denial of Service
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ffmpeg | Ffmpeg | 4.1 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
References
- https://lists.debian.org/debian-lts-announce/2021/08/msg00018.htmlMailing List, Third Party Advisory
- https://trac.ffmpeg.org/ticket/7989Exploit, Patch, Vendor Advisory
- https://www.debian.org/security/2021/dsa-4990Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/08/msg00018.htmlMailing List, Third Party Advisory
- https://trac.ffmpeg.org/ticket/7989Exploit, Patch, Vendor Advisory
- https://www.debian.org/security/2021/dsa-4990Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-21041?
Buffer Overflow vulnerability exists in FFmpeg 4.1 via apng_do_inverse_blend in libavcodec/pngenc.c, which could let a remote malicious user cause a Denial of Service
How severe is CVE-2020-21041?
CVE-2020-21041 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.05% probability of exploitation in the next 30 days.
How do I fix CVE-2020-21041?
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-2020-21041?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST