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Vulnerability of OpenJPEG: out-of-bounds memory reading via opj_t2_encode_packet

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via opj_t2_encode_packet() of OpenJPEG, in order to trigger a denial of service, or to obtain sensitive information.
Vulnerable systems: Debian, Fedora, Solaris, Ubuntu.
Severity of this threat: 2/4.
Creation date: 22/12/2020.
Références of this weakness: CVE-2020-27843, DSA-4882-1, FEDORA-2020-3e00413763, FEDORA-2020-d32853a28d, USN-4685-1, USN-4686-1, VIGILANCE-VUL-34190.

Description of the vulnerability 

An attacker can force a read at an invalid address via opj_t2_encode_packet() of OpenJPEG, in order to trigger a denial of service, or to obtain sensitive information.
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This computer weakness bulletin impacts software or systems such as Debian, Fedora, Solaris, Ubuntu.

Our Vigil@nce team determined that the severity of this computer threat announce is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this threat announce.

Solutions for this threat 

Debian 10: new openjpeg2 packages.
New packages are available:
  Debian 10: openjpeg2 2.3.0-2+deb10u2

Fedora 32: new mingw-openjpeg2 packages.
New packages are available:
  Fedora 32: mingw-openjpeg2 2.3.1-11.fc32

Fedora 32: new openjpeg2 packages.
New packages are available:
  Fedora 32: openjpeg2 2.3.1-10.fc32

Fedora 33: new mingw-openjpeg2 packages.
New packages are available:
  Fedora 33: mingw-openjpeg2 2.3.1-11.fc33

Fedora 33: new openjpeg2 packages.
New packages are available:
  Fedora 33: openjpeg2 2.3.1-10.fc33

Oracle Solaris: patch for third party software of January 2021 v4.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

Ubuntu: new ghostscript packages.
New packages are available:
  Ubuntu 18.04 LTS: ghostscript 9.26~dfsg+0-0ubuntu0.18.04.14
  Ubuntu 16.04 LTS: ghostscript 9.26~dfsg+0-0ubuntu0.16.04.14

Ubuntu: new libopenjp packages.
New packages are available:
  Ubuntu 20.10: libopenjp 2.3.1-1ubuntu4.20.10.1
  Ubuntu 20.04 LTS: libopenjp 2.3.1-1ubuntu4.20.04.1
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