#VU51242 Resource management error in containerd - CVE-2021-21334

Vulnerability identifier: #VU51242

Vulnerability risk: Medium

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2021-21334

CWE-ID: CWE-399

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
containerd

Software vendor:
containerd

The vulnerability allows an attacker to gain access to potentially sensitive information.

The vulnerability exists due to incorrect management of internal resources. Containers launched through containerd's CRI implementation (through Kubernetes, crictl, or any other pod/container client that uses the containerd CRI service) that share the same image may receive incorrect environment variables, including values that are defined for other containers. If the affected containers have different security contexts, this may allow sensitive information to be unintentionally shared.

Install updates from vendor's website.

• https://github.com/containerd/containerd/security/advisories/GHSA-6g2q-w5j3-fwh4
• https://github.com/containerd/containerd/releases/tag/v1.3.10
• https://github.com/containerd/containerd/releases/tag/v1.4.4