CVE-2024-32020

NameCVE-2024-32020
DescriptionGit is a revision control system. Prior to versions 2.45.1, 2.44.1, 2.43.4, 2.42.2, 2.41.1, 2.40.2, and 2.39.4, local clones may end up hardlinking files into the target repository's object database when source and target repository reside on the same disk. If the source repository is owned by a different user, then those hardlinked files may be rewritten at any point in time by the untrusted user. Cloning local repositories will cause Git to either copy or hardlink files of the source repository into the target repository. This significantly speeds up such local clones compared to doing a "proper" clone and saves both disk space and compute time. When cloning a repository located on the same disk that is owned by a different user than the current user we also end up creating such hardlinks. These files will continue to be owned and controlled by the potentially-untrusted user and can be rewritten by them at will in the future. The problem has been patched in versions 2.45.1, 2.44.1, 2.43.4, 2.42.2, 2.41.1, 2.40.2, and 2.39.4.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1071160

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
git (PTS)buster1:2.20.1-2+deb10u3vulnerable
buster (security)1:2.20.1-2+deb10u8vulnerable
bullseye (security), bullseye1:2.30.2-1+deb11u2vulnerable
bookworm1:2.39.2-1.1vulnerable
trixie1:2.43.0-1vulnerable
sid1:2.45.1-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
gitsource(unstable)1:2.45.1-11071160

Notes

https://github.com/git/git/security/advisories/GHSA-5rfh-556j-fhgj
https://github.com/git/git/commit/1204e1a824c34071019fe106348eaa6d88f9528d
https://github.com/git/git/commit/9e65df5eab274bf74c7b570107aacd1303a1e703

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