CVE-2021-21237

Git LFS can execute a Git binary from the current directory on Windows

Published: Jan 15, 2021Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-426

7.2HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:LAttack Vector

Local

AC:HAttack Complexity

High

PR:LPrivileges Required

Low

UI:RUser Interaction

Required

Scope

S:CScope

Changed

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:NAvailability

None

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Weaknesses

CWE-426

Affected Products

git-lfs

oss-projectaka git lfs

git-lfsMixed

DevTools & CI / source-control

git large file storage project

oss-projectaka git-lfs

git large file storageMixed

DevTools & CI / source-control

package-ecosystem

github.com/git-lfs/git-lfs

OSS Libraries

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Persistence

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References

https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5

github.com

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955

cve.mitre.org

https://github.com/git-lfs/git-lfs/releases/tag/v2.13.2

github.com

and 4 more references View all →

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