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

DLA 2975-1: openjpeg2 security update

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Debian LTS Advisory DLA-2975-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Anton Gladky
April 10, 2022   https://wiki.debian.org/LTS
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Package : openjpeg2
Version : 2.1.2-1.1+deb9u7
CVE ID : CVE-2020-27842 CVE-2020-27843 CVE-2021-29338 CVE-2022-1122

Multiple vulnerabilities have been discovered in openjpeg2, the open-source
JPEG 2000 codec.

CVE-2020-27842

Null pointer dereference through specially crafted input. The highest impact
of this flaw is to application availability.

CVE-2020-27843

The flaw allows an attacker to provide specially crafted input to the
conversion or encoding functionality, causing an out-of-bounds read. The
highest threat from this vulnerability is system availability.

CVE-2021-29338

Integer overflow allows remote attackers to crash the application, causing a
denial of service. This occurs when the attacker uses the command line
option "-ImgDir" on a directory that contains 1048576 files.

CVE-2022-1122

Input directory with a large number of files can lead to a segmentation
fault and a denial of service due to a call of free() on an uninitialized
pointer.

For Debian 9 stretch, these problems have been fixed in version
2.1.2-1.1+deb9u7.

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