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

0.0
high

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.05% (20th percentile)
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NVD
7.8 high

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  • Snyk ID SNYK-GOLANG-GITHUBCOMGITLFSGITLFSLFS-1061935
  • published 18 Jan 2021
  • disclosed 18 Jan 2021
  • credit Ry0taK
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Introduced: 18 Jan 2021

CVE-2021-21237 Open this link in a new tab
CWE-94 Open this link 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.