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CVE-2021-21237

7.2 · HIGH

Git LFS is a command line extension for managing large files with Git.

Published Jan 15, 2021CWE-426EPSS 0.45%

Overview

CVE-2021-21237 is a high-severity vulnerability. It was published on January 15, 2021 and has a CVSS 3.1 base score of 7.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

Git LFS is a command line extension for managing large files with Git. On Windows, if Git LFS operates on a malicious repository with a git.bat or git.exe file in the current directory, that program would be executed, permitting the attacker to execute arbitrary code. This does not affect Unix systems. This is the result of an incomplete fix for CVE-2020-27955. This issue occurs because on Windows, Go includes (and prefers) the current directory when the name of a command run does not contain a directory separator. Other than avoiding untrusted repositories or using a different operating system, there is no workaround. This is fixed in v2.13.2.

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

Refcve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955GitHubgithub.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72aGitHubgithub.com/git-lfs/git-lfs/releases/tag/v2.13.2GitHubgithub.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5Refcve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955GitHubgithub.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72aGitHubgithub.com/git-lfs/git-lfs/releases/tag/v2.13.2GitHubgithub.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5

How CyberStrike helps

Frequently asked questions

What is CVE-2021-21237?

CVE-2021-21237 is a high-severity vulnerability. It was published on January 15, 2021 and has a CVSS 3.1 base score of 7.2 (HIGH).

How severe is CVE-2021-21237?

This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-21237?

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-2021-21237?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-21237 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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