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CVE-2021-3566

Published: 5 August 2021

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).

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
ffmpeg
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(7:3.4.11-0ubuntu0.1+esm2)
focal Not vulnerable
(7:4.2.7-0ubuntu0.1)
hirsute Not vulnerable
(4.3)
impish Not vulnerable
(7:4.4-6ubuntu5)
jammy Not vulnerable
(7:4.4.1-3ubuntu2)
kinetic Not vulnerable
(7:4.4.1-3ubuntu2)
lunar Not vulnerable
(7:4.4.1-3ubuntu2)
mantic Not vulnerable
(7:4.4.1-3ubuntu2)
noble Not vulnerable
(7:4.4.1-3ubuntu2)
trusty Does not exist

upstream
Released (4.2.6)
xenial
Released (7:2.8.17-0ubuntu0.1+esm4)
Available with Ubuntu Pro
Patches:
upstream: https://github.com/FFmpeg/FFmpeg/commit/3bce9e9b3ea35c54bacccc793d7da99ea5157532#diff-74f6b92a0541378ad15de9c29c0a2b0c69881ad9ffc71abe568b88b535e00a7f

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N