Vulnerability identifier: #VU86203

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12278

CWE-ID: CWE-706

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libgit2
Universal components / Libraries / Libraries used by multiple products

Vendor: libgit2.github.com

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper handling of equivalent filenames that exist because of NTFS Alternate Data Streams in path.c. A remote attacker can trick the victim into cloning a specially crafted repository and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libgit2: 0.1.0 - 0.28.3

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External links
http://github.com/libgit2/libgit2/releases/tag/v0.28.4
http://github.com/libgit2/libgit2/releases/tag/v0.99.0
http://github.com/libgit2/libgit2/commit/e1832eb20a7089f6383cfce474f213157f5300cb
http://github.com/git/git/security/advisories/GHSA-5wph-8frv-58vj
http://github.com/libgit2/libgit2/commit/3f7851eadca36a99627ad78cbe56a40d3776ed01
http://lists.debian.org/debian-lts-announce/2022/03/msg00031.html
http://lists.debian.org/debian-lts-announce/2023/02/msg00034.html

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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.