CVE-2021-21237 HIGH

CVE-2021-21237: Git LFS can execute a Git binary from the current directory on Windows

Vendor Git-Lfs
Product git-lfs
Weakness CWE-426
Published January 15, 2021
Last update August 3, 2024

CVSS base score

7.2/10
Attack vector Local
Attack complexity High
Privileges required Low
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 15, 2021 CVE published
August 3, 2024 Record updated