#VU48175 Input validation error in Git LFS - CVE-2020-27955

Vulnerability identifier: #VU48175

Vulnerability risk: High

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2020-27955

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

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

Vendor: Git

Description

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

The vulnerability exists due to insufficient validation of files. A remote user can upload a specially crafted binary to the repository and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Git LFS: 2.12.0

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External links
https://seclists.org/fulldisclosure/2020/Nov/1
https://github.com/git-lfs/git-lfs/releases
https://legalhackers.com
https://legalhackers.com/advisories/Git-LFS-RCE-Exploit-CVE-2020-27955.html
https://exploitbox.io/vuln/Git-Git-LFS-RCE-Exploit-CVE-2020-27955.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.