An Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with a classic personal access token (PAT) lacking the repo scope to retrieve issues and commits from private and internal repositories via the search REST API endpoints. The user must have had existing access to the repository through organization membership or as a collaborator for the vulnerability to be exploitable. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.16.15, 3.17.12, 3.18.6 and 3.19.3.
This vulnerability was reported via the GitHub Bug Bounty program.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.15
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.12
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.6
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.3
product-cna@github.com