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CVE-2024-32021

May 14, 2024, 8:15 p.m.

CVSS Score

3.9 / 10

Product(s) Impacted

Git

  • 2.45.1
  • 2.44.1
  • 2.43.4
  • 2.42.2
  • 2.41.1
  • 2.40.2
  • 2.39.4

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.

Weaknesses

Date

Published: May 14, 2024, 8:15 p.m.

Last Modified: May 14, 2024, 8:15 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

security-advisories@github.com

CVSS Data

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

LOW

Base Score
3.9
Exploitability Score
Impact Score
Base Severity
LOW
CVSS Vector String

The CVSS vector string provides an in-depth view of the vulnerability metrics.

View Vector String

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L

References

https://github.com/ security-advisories@github.com