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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2024-32021 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://www.openwall.com/lists/oss-security/2024/05/14/2 CVE, GitHub, Inc. Mailing List  Third Party Advisory 
https://github.com/git/git/security/advisories/GHSA-mvxm-9j2h-qjx7 CVE, GitHub, Inc. Exploit  Vendor Advisory 
https://lists.debian.org/debian-lts-announce/2024/06/msg00018.html CVE, GitHub, Inc. Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2024/09/msg00009.html CVE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/[email protected]/message/S4CK4IYTXEOBZTEM5K3T6LWOIZ3S44AR/ CVE, GitHub, Inc. Mailing List  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-547 Use of Hard-coded, Security-relevant Constants GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

6 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-32021
NVD Published Date:
05/14/2024
NVD Last Modified:
01/05/2026
Source:
GitHub, Inc.