A cimg security update has been released for Debian GNU/Linux 9 LTS to address multiple heap buffer overflows.

DLA 2462-1: cimg security update

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Debian LTS Advisory DLA-2462-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Adrian Bunk
November 23, 2020   https://wiki.debian.org/LTS
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Package : cimg
Version : 1.7.9+dfsg-1+deb9u2
CVE ID : CVE-2020-25693
Debian Bug : 973770

Multiple heap buffer overflows have been fixed in CImg,
a C++ toolkit to load, save, process and display images.

For Debian 9 stretch, this problem has been fixed in version
1.7.9+dfsg-1+deb9u2.

We recommend that you upgrade your cimg packages.

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

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