#VU91287 UNIX symbolic link following in Git - CVE-2024-32021

Vulnerability identifier: #VU91287

Vulnerability risk: Medium

CVSSv4.0: 3.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-32021

CWE-ID: CWE-61

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Git
Client/Desktop applications / Software for system administration

Vendor: Git

Description

The vulnerability allows a remote attacker to compromise the original repository.

The vulnerability exists due to insecure symlink following issue. 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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Git: 2.0.0 - 2.0.5, 2.1.0 - 2.19.5, 2.2.0 - 2.29.3, 2.3.0 - 2.39.4, 2.4 - 2.45.1, 2.5 - 2.5.6, 2.6 - 2.6.7, 2.7 - 2.7.6, 2.8 - 2.8.6, 2.9 - 2.9.5

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External links
https://github.com/git/git/security/advisories/GHSA-mvxm-9j2h-qjx7

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.