A ffmpeg security update has been released for Debian GNU/Linux 9 LTS to address several vulnerabilities.

DLA 2291-1: ffmpeg security update

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Debian LTS Advisory DLA-2291-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/
July 27, 2020   https://wiki.debian.org/LTS
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Package : ffmpeg
Version : 7:3.2.15-0+deb9u1
CVE ID : CVE-2019-13390 CVE-2019-17542 CVE-2020-13904
Debian Bug :

Several vulnerabilities have been fixed by upgrading FFmpeg,
a widely used multimedia framework, from 3.2.14 to 3.2.15.

CVE-2019-13390

rawenc: Only accept the appropriate stream type for raw muxers.

CVE-2019-17542

Heap-based buffer overflow in vqa_decode_chunk.

CVE-2020-13904

Use-after-free via a crafted EXTINF duration in an m3u8 file.

For Debian 9 stretch, these problems have been fixed in version
7:3.2.15-0+deb9u1.

Several other bugs are also fixed in 3.2.15,
a full list of changes is available at
  https://git.ffmpeg.org/gitweb/ffmpeg.git/blob/37a8ad9a3167923d500910031a8086489c004d83:/Changelog

We recommend that you upgrade your ffmpeg packages.

For the detailed security status of ffmpeg please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/ffmpeg

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS