A pngcheck security update has been released for Debian GNU/Linux 10 LTS to address multiple security issues.

DLA 3238-1: pngcheck security update

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Debian LTS Advisory DLA-3238-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Tobias Frost
December 13, 2022   https://wiki.debian.org/LTS
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Package : pngcheck
Version : 3.0.3-1~deb10u2
CVE ID : CVE-2020-35511
Debian Bugs : 1021278

Multiple security issues were discovered in pngcheck, a tool to verify the
integrity of PNG, JNG and MNG files, which could potentially result
in the execution of arbitrary code.

CVE-2020-35511

A global buffer overflow was discovered in pngcheck function in
pngcheck-2.4.0 (5 patches applied) via a crafted png file.

For Debian 10 buster, these problems have been fixed in version
3.0.3-1~deb10u2.

We recommend that you upgrade your pngcheck packages.

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

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