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Vulnerability of OpenJPEG: buffer overflow via opj_tcd_dc_level_shift_encode

Synthesis of the vulnerability 

An attacker can trigger a buffer overflow via opj_tcd_dc_level_shift_encode() of OpenJPEG, in order to trigger a denial of service, and possibly to run code.
Impacted systems: Debian, Fedora, Ubuntu.
Severity of this alert: 2/4.
Creation date: 16/12/2020.
Références of this alert: CVE-2020-27823, DLA-2550-1, DSA-4882-1, FEDORA-2020-4cd57a6876, FEDORA-2020-d32853a28d, USN-4685-1, USN-4880-1, VIGILANCE-VUL-34133.

Description of the vulnerability 

An attacker can trigger a buffer overflow via opj_tcd_dc_level_shift_encode() of OpenJPEG, in order to trigger a denial of service, and possibly to run code.
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This computer weakness note impacts software or systems such as Debian, Fedora, Ubuntu.

Our Vigil@nce team determined that the severity of this security bulletin 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 weakness announce.

Solutions for this threat 

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

Debian 9: new openjpeg2 packages.
New packages are available:
  Debian 9: openjpeg2 2.1.2-1.1+deb9u6

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 2.3.1-10.fc33

Fedora 33: new openjpeg2 packages.
New packages are available:
  Fedora 33: openjpeg2 2.3.1-9.fc33

Ubuntu 16.04: new libopenjp packages.
New packages are available:
  Ubuntu 16.04 LTS: libopenjp2-7 2.1.2-1.1+deb9u6build0.16.04.1, libopenjp3d7 2.1.2-1.1+deb9u6build0.16.04.1, libopenjpip7 2.1.2-1.1+deb9u6build0.16.04.1

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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