CVE-2024-32021: 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…

PriorityP335high7.1CVSS 3.1

AVLACLPRNUIRSUCHIHAN

EPSS

0.96%

57.0th percentile

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.

Affected

35 ranges· showing 25

Vendor	Product	Version range	Fixed in
debian	debian_linux	—	—
debian	debian_linux	—	—
debian	git	< git 1:2.39.5-0+deb12u1 (bookworm)	git 1:2.39.5-0+deb12u1 (bookworm)
fedoraproject	fedora	—	—
git-scm	git	< 2.39.4	2.39.4
git-scm	git	—	—
git-scm	git	—	—
git-scm	git	—	—
git-scm	git	>= 2.40.0 < 2.40.2	2.40.2
git-scm	git	>= 2.42.0 < 2.42.2	2.42.2
git-scm	git	>= 2.43.0 < 2.43.4	2.43.4
git	git	>= 0 < 2.39.5-r0	2.39.5-r0
git	git	>= 0 < 2.40.3-r0	2.40.3-r0
git	git	>= 0 < 2.43.4-r0	2.43.4-r0
git	git	>= 0 < 2.45.1-r0	2.45.1-r0
git	git	>= 0 < 2.45.1-r0	2.45.1-r0
git	git	>= 0 < 2.45.1-r0	2.45.1-r0
git	git	>= 0 < 2.45.1-r0	2.45.1-r0
git	git	>= 0 < 1:2.30.2-1+deb11u3	1:2.30.2-1+deb11u3
git	git	>= 0 < 1:2.39.5-0+deb12u1	1:2.39.5-0+deb12u1
git	git	>= 0 < 1:2.45.1-1	1:2.45.1-1
git	git	>= 0 < 1:2.45.1-1	1:2.45.1-1
git	git	>= 0 < 1:2.25.1-1ubuntu3.12	1:2.25.1-1ubuntu3.12
git	git	>= 0 < 1:2.34.1-1ubuntu1.11	1:2.34.1-1ubuntu1.11
git	git	>= 0 < 1:2.43.0-1ubuntu7.1	1:2.43.0-1ubuntu7.1

CVSS provenance

nvdv3.17.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

osv9.0CRITICAL

vendor_ubuntu9.0CRITICAL

vendor_debian5.5MEDIUM

vendor_redhat5.5MEDIUM

vendor_msrc3.9LOW

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