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This repository was archived by the owner on Sep 30, 2024. It is now read-only.

Arbitrary Command Execution in gitserver through customGitFetch feature

Critical
evict published GHSA-4qhq-4x4h-fxm8 Nov 22, 2022

Package

gomod Sourcegraph (Go)

Affected versions

< 4.1.0

Patched versions

4.1.0

Description

Impact

As a site admin it was possible to execute arbitrary commands on Gitserver when the experimental customGitFetch feature was enabled. This experimental feature has now been disabled by default.

Patches

This has been resolved in version 4.1.0.

References

For more information

If you have any questions or comments about this advisory email us at security@sourcegraph.com

Severity

Critical

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
High
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
Low

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:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L

CVE ID

CVE-2022-41943

Weaknesses

Incorrect Default Permissions

During installation, installed file permissions are set to allow anyone to modify those files. Learn more on MITRE.