CVE details
CVE-2021-3566
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).
Affected ports (1)
| Port | Package | Version | Status | Maintainer |
|---|---|---|---|---|
| multimedia/ffmpeg3 | ffmpeg3 | 3.0.2_1 | unaddressed | kreinholz@gmail.com |
Template for a VuXML entry
Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.
<vuln vid="FIXME (make newentry)">
<topic>FIXME -- FIXME</topic>
<affects>
<package>
<name>ffmpeg3</name>
<range><lt>4.3</lt></range>
</package>
</affects>
<description>
<body xmlns="http://www.w3.org/1999/xhtml">
<p>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).</p>
</body>
</description>
<references>
<cvename>CVE-2021-3566</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2021-3566</url>
</references>
<dates>
<discovery>2021-08-05</discovery>
<entry>2026-10-25</entry>
</dates>
</vuln>