CVE-2021-21237

NameCVE-2021-21237
DescriptionGit 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
git-lfs (PTS)buster2.7.1-1+deb10u1fixed
bullseye2.13.2-1fixed
bookworm3.3.0-1fixed
trixie3.4.1-1fixed
sid3.5.0-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
git-lfssource(unstable)(not affected)

Notes

- git-lfs <not-affected> (Windows-specific)
https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5

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