A freetype security update has been released for Debian GNU/Linux 9 LTS to address a heap-based buffer overflow vulnerability in the handling of embedded PNG bitmaps in FreeType.

DLA 2415-1: freetype security update

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Debian LTS Advisory DLA-2415-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Thorsten Alteholz
October 25, 2020   https://wiki.debian.org/LTS
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Package : freetype
Version : 2.6.3-3.2+deb9u2
CVE ID : CVE-2020-15999

Sergei Glazunov discovered a heap-based buffer overflow vulnerability in
the handling of embedded PNG bitmaps in FreeType. Opening malformed fonts
may result in denial of service or the execution of arbitrary code.

For Debian 9 stretch, this problem has been fixed in version
2.6.3-3.2+deb9u2.

We recommend that you upgrade your freetype packages.

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

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