CVE-2020-20891: ffmpeg Classic Buffer Overflow
CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2020-20891DEBIAN-CVE-2020-20891
Published 20-09-2021Last modified 04-08-2024
Vulnerability summary
CVE-2020-20891 is a high (CVSS 8.8) Classic Buffer Overflow vulnerability in ffmpeg. EPSS estimates a 1.24% chance of exploitation in the next 30 days, higher than 68.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
8.8/10
010
High · v3.1 (NVD)EPSS score
1.24%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 5 · Related 3Timeline
- 20-09-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 8.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.24%
Chance of exploitation in the next 30 days
Percentile
69%
Versus all other CVEs
30-day change
+0.01 pp
From 1.23% on 19-09-2026
19-09-202619-10-2026
EPSS score1.24%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (trac.ffmpeg.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian1 product
- ffmpeg< 7:4.3-2
Ffmpeg1 product
- ffmpegEOL4.2.1
Ubuntu1 product
- qtwebengine-opensource-srcAll versions (No fix recorded)
3 vendors · 3 products
References
5 links- git.ffmpeg.org/gitweb/ffmpeg.git/commit/64a805883d7223c868a683f0030837d859edd2abX Refsource MISCREPORTMailing ListVendor Advisory
