CVE-2024-32021

Name
CVE-2024-32021
Description
Git 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, when cloning a local source repository that contains symlinks via the filesystem, Git may create hardlinks to arbitrary user-readable files on the same filesystem as the target repository in the `objects/` directory. Cloning a local repository over the filesystem may creating hardlinks to arbitrary user-owned files on the same filesystem in the target Git repository's `objects/` directory. When cloning a repository over the filesystem (without explicitly specifying the `file://` protocol or `--no-local`), the optimizations for local cloning will be used, which include attempting to hard link the object files instead of copying them. While the code includes checks against symbolic links in the source repository, which were added during the fix for CVE-2022-39253, these checks can still be raced because the hard link operation ultimately follows symlinks. If the object on the filesystem appears as a file during the check, and then a symlink during the operation, this will allow the adversary to bypass the check and create hardlinks in the destination objects directory to arbitrary, user-readable files. 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.
NVD Severity
low
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
CONFIRM https://github.com/git/git/security/advisories/GHSA-mvxm-9j2h-qjx7
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S4CK4IYTXEOBZTEM5K3T6LWOIZ3S44AR/
http://www.openwall.com/lists/oss-security/2024/05/14/2

Match rules

CPE URI Source package Min version Max version
git >= 0 = 2.45.0
git >= 0 = 2.44.0
git >= 2.43.0 < 2.43.4
git >= 2.42.0 < 2.42.2
git >= 0 = 2.41.0
git >= 2.40.0 < 2.40.2
git >= 0 < 2.39.4
cpe:2.3:a:git:git:*:*:*:*:*:*:*:* git >= 0 < 2.39.4
cpe:2.3:a:git:git:*:*:*:*:*:*:*:* git >= 2.40.0 < 2.40.2
cpe:2.3:a:git:git:*:*:*:*:*:*:*:* git >= 2.41.0 < 2.41.1
cpe:2.3:a:git:git:*:*:*:*:*:*:*:* git >= 2.42.0 < 2.42.2
cpe:2.3:a:git:git:*:*:*:*:*:*:*:* git >= 2.43.0 < 2.43.4
cpe:2.3:a:git:git:*:*:*:*:*:*:*:* git >= 2.44.0 < 2.44.1
cpe:2.3:a:git:git:*:*:*:*:*:*:*:* git >= 2.45.0 < 2.45.1

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
git 3.19-main 2.43.4-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
git 3.18-main 2.40.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
git 3.17-main 2.38.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
git 3.16-main 2.36.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable