Resource management error in containerd - CVE-2021-21334

Vulnerability identifier: #VU51242

CSH Severity: Medium

CVSS v4.0: 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

Affected software:
containerd
Gentoo Linux
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE CaaS Platform
SUSE MicroOS
SUSE Enterprise Storage
SUSE Linux Enterprise Module for Containers
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Server
Ubuntu
Fedora
IBM Cloud Pak for Security
IBM MQ Operator
QRadar Suite
IBM Edge Application Manager
runc
runc-debuginfo
containerd (Ubuntu package)
containerd
golang-github-containerd-cri
docker
docker-debuginfo
Dell EMC VxRail Appliance

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