5.5

CVE-2021-3566: debian debian_linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2021-3566DEBIAN-CVE-2021-3566CGA-4wcq-c4wg-63wq
Published 05-08-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-3566 is a medium (CVSS 5.5) vulnerability in debian debian_linux. EPSS estimates a 0.88% chance of exploitation in the next 30 days, higher than 58.4% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.88%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 4
DLA-2742-1DSA-5126-1OPENSUSE-SU-2021:3521-1SUSE-SU-2021:3521-1SUSE-SU-2023:0005-1USN-5167-1

Timeline

  1. 05-08-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Prior to ffmpeg version 4.3, the tty demuxer did not have a 'read_probe' function assigned to it. By crafting a legitimate "ffconcat" file that references an image, followed by a file the triggers the tty demuxer, the contents of the second file will be copied into the output file verbatim (as long as the `-vcodec copy` option is passed to ffmpeg).

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.88%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

0.00 pp

From 0.88% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.88%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard4 products
  • torchaudio-ffmpeg-tarballsAll versions (No fix recorded)
  • torchaudio-ffmpeg-tarballs-4.4.4All versions (No fix recorded)
  • torchaudio-ffmpeg-tarballs-5.0.3All versions (No fix recorded)
  • torchaudio-ffmpeg-tarballs-6.0All versions (No fix recorded)
Debian2 products
Ffmpeg1 product
Ubuntu1 product
  • ffmpeg< 7:2.8.17-0ubuntu0.1+esm4

4 vendors · 8 products

References

6 links