CVE-2021-22863

 

Published at: - 03-03-2021 05:15

Last modified: - 25-10-2022 04:03

Total changes: - 3

Description

An improper access control vulnerability was identified in the GitHub Enterprise Server GraphQL API that allowed authenticated users of the instance to modify the maintainer collaboration permission of a pull request without proper authorization. By exploiting this vulnerability, an attacker would be able to gain access to head branches of pull requests opened on repositories of which they are a maintainer. Forking is disabled by default for organization owned private repositories and would prevent this vulnerability. Additionally, branch protections such as required pull request reviews or status checks would prevent unauthorized commits from being merged without further review or validation. This vulnerability affected all versions of GitHub Enterprise Server since 2.12.22 and was fixed in versions 2.20.24, 2.21.15, 2.22.7 and 3.0.1. This vulnerability was reported via the GitHub Bug Bounty program.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://docs.github.com/en/enterprise-server@2.21/admin/release-notes#2.21.15
• https://docs.github.com/en/enterprise-server@3.0/admin/release-notes#3.0.1
• https://docs.github.com/en/enterprise-server@2.22/admin/release-notes#2.22.7
• https://docs.github.com/en/enterprise-server@2.20/admin/release-notes#2.20.24

 

Keywords

NVD

 

CVE-2021-22863

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures