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Vulnerability of containerd: privilege escalation via Shim API Socket

Synthesis of the vulnerability 

An attacker can bypass restrictions via Shim API Socket of containerd, in order to escalate his privileges.
Vulnerable software: Debian, Docker CE, Fedora, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this announce: 2/4.
Creation date: 01/12/2020.
Références of this computer vulnerability: CVE-2020-15257, DSA-4865-1, FEDORA-2020-baeb8dbaea, openSUSE-SU-2021:0278-1, SUSE-SU-2020:3938-1, SUSE-SU-2021:0435-1, USN-4653-1, VIGILANCE-VUL-34009.

Description of the vulnerability 

An attacker can bypass restrictions via Shim API Socket of containerd, in order to escalate his privileges.
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This weakness announce impacts software or systems such as Debian, Docker CE, Fedora, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this vulnerability alert is medium.

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

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

Solutions for this threat 

Debian 10: new docker.io packages.
New packages are available:
  Debian 10: docker.io 18.09.1+dfsg1-7.1+deb10u3

Fedora 33: new containerd packages.
New packages are available:
  Fedora 33: containerd 1.4.3-1.fc33

Moby: version 19.03.14.
The version 19.03.14 is fixed:
  https://github.com/moby/moby/

openSUSE Leap 15.2: new containerd packages.
New packages are available:
  openSUSE Leap 15.2: containerd 1.3.9-lp152.2.3.1, docker 19.03.15_ce-lp152.2.3.1

SUSE LE 12: new containerd packages.
New packages are available:
  SUSE LE 12 RTM-SP5: containerd 1.3.9-16.32.1, docker 19.03.14_ce-98.57.1

SUSE LE 15 SP1-3: new containerd packages.
New packages are available:
  SUSE LE 15 SP1: containerd 1.3.9-5.29.3, docker 19.03.15_ce-6.43.3
  SUSE LE 15 SP2: containerd 1.3.9-5.29.3, docker 19.03.15_ce-6.43.3
  SUSE LE 15 SP3: containerd 1.3.9-5.29.3, docker 19.03.15_ce-6.43.3

Ubuntu: new containerd packages.
New packages are available:
  Ubuntu 20.10: containerd 1.3.7-0ubuntu3.1
  Ubuntu 20.04 LTS: containerd 1.3.3-0ubuntu2.1
  Ubuntu 18.04 LTS: containerd 1.3.3-0ubuntu1~18.04.3
  Ubuntu 16.04 LTS: containerd 1.2.6-0ubuntu1~16.04.5
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