An openjpeg2 security update has been released for Debian GNU/Linux 9 LTS to address eight security issues.

DLA 2550-1: openjpeg2 security update

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Debian LTS Advisory DLA-2550-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Brian May
February 09, 2021   https://wiki.debian.org/LTS
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Package : openjpeg2
Version : 2.1.2-1.1+deb9u6
CVE ID : CVE-2020-27814 CVE-2020-27823 CVE-2020-27824 CVE-2020-27841

CVE-2020-27844 CVE-2020-27845

Various overflow errors were identified and fixed.

CVE-2020-27814

A heap-buffer overflow was found in the way openjpeg2 handled certain PNG format files.

CVE-2020-27823

Wrong computation of x1,y1 if -d option is used, resulting in heap buffer
overflow.

CVE-2020-27824

Global buffer overflow on irreversible conversion when too many
decomposition levels are specified.

CVE-2020-27841

Crafted input to be processed by the openjpeg encoder could cause an
out-of-bounds read.

CVE-2020-27844

Crafted input to be processed by the openjpeg encoder could cause an
out-of-bounds write.

CVE-2020-27845

Crafted input can cause out-of-bounds-read.

For Debian 9 stretch, these problems have been fixed in version
2.1.2-1.1+deb9u6.

We recommend that you upgrade your openjpeg2 packages.

For the detailed security status of openjpeg2 please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/openjpeg2

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