Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTRnNHAtNDJ3Yy05ZjNt

Git LFS can execute a Git binary from the current directory

Impact

On Windows, if Git LFS operates on a malicious repository with a git.bat or git.exe file in the current directory, that program would be executed, permitting the attacker to execute arbitrary code. This does not affect Unix systems.

This occurs because on Windows, Go includes (and prefers) the current directory when the name of a command run does not contain a directory separator.

Patches

This version should be patched in v2.12.1, which will be released in coordination with this security advisory.

Workarounds

Other than avoiding untrusted repositories, there is no workaround.

For more information

If you have any questions or comments about this advisory:

• Start a discussion in the Git LFS discussion page.
• If you cannot open a discussion, please email the core team using their usernames at github.com.

Permalink: https://github.com/advisories/GHSA-4g4p-42wc-9f3m
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTRnNHAtNDJ3Yy05ZjNt
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 2 years ago
Updated: over 1 year ago

CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-4g4p-42wc-9f3m, CVE-2020-27955
References:

• https://github.com/git-lfs/git-lfs/security/advisories/GHSA-4g4p-42wc-9f3m
• https://nvd.nist.gov/vuln/detail/CVE-2020-27955
• https://github.com/git-lfs/git-lfs/releases
• https://legalhackers.com/advisories/Git-LFS-RCE-Exploit-CVE-2020-27955.html
• http://seclists.org/fulldisclosure/2020/Nov/1
• https://github.com/advisories/GHSA-4g4p-42wc-9f3m

Repository: https://github.com/git-lfs/git-lfs
Blast Radius: 13.9

Affected Packages