CVE-2024-32021
Git Hardlink Symlinkmlink Vulnerability
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.
INFO
Published Date :
May 14, 2024, 8:15 p.m.
Last Modified :
Nov. 21, 2024, 9:14 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
2.7
Exploitability Score :
0.8
Public PoC/Exploit Available at Github
CVE-2024-32021 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-32021.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Dockerfile Go
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-32021 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-32021 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2024/05/14/2 Added Reference https://github.com/git/git/security/advisories/GHSA-mvxm-9j2h-qjx7 Added Reference https://lists.debian.org/debian-lts-announce/2024/06/msg00018.html Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/S4CK4IYTXEOBZTEM5K3T6LWOIZ3S44AR/ -
CVE Modified by [email protected]
Jun. 26, 2024
Action Type Old Value New Value Added Reference GitHub, Inc. https://lists.debian.org/debian-lts-announce/2024/06/msg00018.html [No types assigned] -
CVE Modified by [email protected]
Jun. 10, 2024
Action Type Old Value New Value Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/S4CK4IYTXEOBZTEM5K3T6LWOIZ3S44AR/ [No types assigned] Added Reference GitHub, Inc. http://www.openwall.com/lists/oss-security/2024/05/14/2 [No types assigned] -
CVE Received by [email protected]
May. 14, 2024
Action Type Old Value New Value Added 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. Added Reference GitHub, Inc. https://github.com/git/git/security/advisories/GHSA-mvxm-9j2h-qjx7 [No types assigned] Added CWE GitHub, Inc. CWE-547 Added CVSS V3.1 GitHub, Inc. AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-32021 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-32021
weaknesses.