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Vulnerability of containerd: information disclosure via CRI Environment Variables

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via CRI Environment Variables of containerd, in order to obtain sensitive information.
Vulnerable products: Docker CE, Fedora, Ubuntu.
Severity of this weakness: 1/4.
Creation date: 15/03/2021.
Références of this bulletin: CVE-2021-21334, FEDORA-2021-10ce8fcbf1, FEDORA-2021-470fa24f5b, USN-4881-1, VIGILANCE-VUL-34842.

Description of the vulnerability 

An attacker can bypass access restrictions to data via CRI Environment Variables of containerd, in order to obtain sensitive information.
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This computer threat alert impacts software or systems such as Docker CE, Fedora, Ubuntu.

Our Vigil@nce team determined that the severity of this weakness announce is low.

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 weakness bulletin.

Solutions for this threat 

Docker Engine: version 20.10.6.
The version 20.10.6 is fixed:
  https://www.docker.com/

Fedora 33: new containerd packages.
New packages are available:
  Fedora 33: containerd 1.4.4-1.fc33

Fedora 33: new golang-github-containerd-cri packages.
New packages are available:
  Fedora 33: golang-github-containerd-cri 1.19.0-3.20210307gitaa2d5a9.fc33

Ubuntu: new containerd packages.
New packages are available:
  Ubuntu 20.10: containerd 1.3.7-0ubuntu3.3
  Ubuntu 20.04 LTS: containerd 1.3.3-0ubuntu2.3
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