Arbitrary Code Execution Affecting github.com/git-lfs/git-lfs/lfs package, versions <2.13.2


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.05% (23rd percentile)

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  • Snyk IDSNYK-GOLANG-GITHUBCOMGITLFSGITLFSLFS-1061935
  • published18 Jan 2021
  • disclosed18 Jan 2021
  • creditRy0taK

Introduced: 18 Jan 2021

CVE-2021-21237  (opens in a new tab)
CWE-94  (opens in a new tab)

How to fix?

Upgrade github.com/git-lfs/git-lfs/lfs to version 2.13.2 or higher.

Overview

Affected versions of this package are vulnerable to Arbitrary Code Execution. This security problem does not affect Unix systems.

On Windows, if Git LFS operates on a malicious repository with a git.bat or git.exe file in the current directory, that program is executed, permitting the attacker to execute arbitrary code. This 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 the same issue as CVE-2020-27955, but the fix for that issue was incomplete and certain options can still cause the problem to occur.

CVSS Scores

version 3.1