CVE-2020-20453 json
FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aaccoder, which allows a remote malicious user to cause a Denial of Service
published 2021-05-25 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-13240
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 78%
- public exploits
- 0
- none known
Summary
FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aaccoder, which allows a remote malicious user to cause a Denial of Service
Patch / fix
- ffmpeg Debian 14, Debian 13, Debian 12 7:4.4.1-1
debian advisories DEBIAN-CVE-2020-20453
- ffmpeg Ubuntu 18.04 LTS 7:3.4.11-0ubuntu0.1
- ffmpeg Ubuntu 20.04 LTS 7:4.2.7-0ubuntu0.1
- ffmpeg Ubuntu Pro 16.04 LTS 7:2.8.17-0ubuntu0.1+esm1
ubuntu advisories UBUNTU-CVE-2020-20453
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- ffmpeg Alpine 3.13 4.3.3-r0
- ffmpeg Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 4.4.1-r0
- ffmpeg4 Alpine 3.22, Alpine 3.21, Alpine 3.20 +4 more 4.4.1-r0
alpine advisories ALPINE-CVE-2020-20453
Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- ffmpeg Arch Linux 2:4.4.1-1
arch linux advisories AVG-1989
- trac.ffmpeg.org/ticket/8003 advisory
Exploit prediction
1.78% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- trac.ffmpeg.org https://trac.ffmpeg.org/ticket/8003 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-369 Divide By Zero
References
-
trac.ffmpeg.org
/ticket/8003
exploit, issue-tracking, patch, vendor-advisory
-
debian.org
/security/2021/dsa-4990
vendor-advisory, third-party-advisory
-
debian.org
/security/2021/dsa-4998
vendor-advisory, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2021/11/msg00012.html
mailing-list, third-party-advisory
Sources
- CVE List CVE-2020-20453
- NVD CVE-2020-20453
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.