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CVE-2021-32760

5.0 · MEDIUM

containerd is a container runtime.

Published Jul 19, 2021CWE-668EPSS 1.59%

Overview

CVE-2021-32760 is a medium-severity vulnerability. It was published on July 19, 2021 and has a CVSS 3.1 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

containerd is a container runtime. A bug was found in containerd versions prior to 1.4.8 and 1.5.4 where pulling and extracting a specially-crafted container image can result in Unix file permission changes for existing files in the host’s filesystem. Changes to file permissions can deny access to the expected owner of the file, widen access to others, or set extended bits like setuid, setgid, and sticky. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process. This bug has been fixed in containerd 1.5.4 and 1.4.8. As a workaround, ensure that users only pull images from trusted sources. Linux security modules (LSMs) like SELinux and AppArmor can limit the files potentially affected by this bug through policies and profiles that prevent containerd from interacting with specific files.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/containerd/containerd/releases/tag/v1.4.8GitHubgithub.com/containerd/containerd/releases/tag/v1.5.4GitHubgithub.com/containerd/containerd/security/advisories/GHSA-c72p-9xmj-rx3wReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDMNDPJJTP3J5GOEDB66F6MGXUTRG3Y3/Refsecurity.gentoo.org/glsa/202401-31GitHubgithub.com/containerd/containerd/releases/tag/v1.4.8GitHubgithub.com/containerd/containerd/releases/tag/v1.5.4GitHubgithub.com/containerd/containerd/security/advisories/GHSA-c72p-9xmj-rx3wReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDMNDPJJTP3J5GOEDB66F6MGXUTRG3Y3/Refsecurity.gentoo.org/glsa/202401-31

How CyberStrike helps

Frequently asked questions

What is CVE-2021-32760?

CVE-2021-32760 is a medium-severity vulnerability. It was published on July 19, 2021 and has a CVSS 3.1 base score of 5.0 (MEDIUM).

How severe is CVE-2021-32760?

This vulnerability has a CVSS 3.1 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-32760?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-32760?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-32760 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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