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GitHub Git LFS Arbitrary command execution vulnerability

High severity GitHub Reviewed Published May 14, 2022 to the GitHub Advisory Database • Updated Oct 2, 2023

Package

gomod github.com/git-lfs/git-lfs (Go)

Affected versions

< 2.1.1-0.20170519163204-f913f5f9c7c6

Patched versions

2.1.1-0.20170519163204-f913f5f9c7c6

Description

GitHub Git LFS before 2.1.1 allows remote attackers to execute arbitrary commands via an ssh URL with an initial dash character in the hostname, located on a url = line in a .lfsconfig file within a repository.

Specific Go Packages Affected

github.com/git-lfs/git-lfs/lfsapi

References

Published by the National Vulnerability Database Dec 21, 2017
Published to the GitHub Advisory Database May 14, 2022
Reviewed Feb 8, 2023
Last updated Oct 2, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS score

0.492%
(77th percentile)

Weaknesses

CVE ID

CVE-2017-17831

GHSA ID

GHSA-w4xh-w33p-4v29

Source code

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