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CVE-2024-21626

8.6 · HIGH

runc is a CLI tool for spawning and running containers on Linux according to the OCI specification.

Published Jan 31, 2024CWE-403EPSS 18.92%

Overview

CVE-2024-21626 is a high-severity vulnerability. It was published on January 31, 2024 and has a CVSS 3.1 base score of 8.6 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc 1.1.11 and earlier, due to an internal file descriptor leak, an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace, allowing for a container escape by giving access to the host filesystem ("attack 2"). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run ("attack 1"). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries, allowing for complete container escapes ("attack 3a" and "attack 3b"). runc 1.1.12 includes patches for this issue.

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

Refpacketstormsecurity.com/files/176993/runc-1.1.11-File-Descriptor-Leak-Privilege-Escalation.htmlRefwww.openwall.com/lists/oss-security/2024/02/01/1Refwww.openwall.com/lists/oss-security/2024/02/02/3GitHubgithub.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7ce8ecfGitHubgithub.com/opencontainers/runc/releases/tag/v1.1.12GitHubgithub.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvvReflists.debian.org/debian-lts-announce/2024/02/msg00005.htmlReflists.fedoraproject.org/archives/list/[email protected]/message/2NLXNE23Q5ESQUAI22Z7A63JX2WMPJ2J/Reflists.fedoraproject.org/archives/list/[email protected]/message/SYMO3BANINS6RGFQFKPRG4FIOJ7GWYTL/Refpacketstormsecurity.com/files/176993/runc-1.1.11-File-Descriptor-Leak-Privilege-Escalation.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-21626?

CVE-2024-21626 is a high-severity vulnerability. It was published on January 31, 2024 and has a CVSS 3.1 base score of 8.6 (HIGH).

How severe is CVE-2024-21626?

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-21626?

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-2024-21626?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-21626 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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