CVE-2021-22865 Information

Description

An improper access control vulnerability was identified in GitHub Enterprise Server that allowed access tokens generated from a GitHub App’s web authentication flow to read private repository metadata via the REST API without having been granted the appropriate permissions. To exploit this vulnerability an attacker would need to create a GitHub App on the instance and have a user authorize the application through the web authentication flow. The private repository metadata returned would be limited to repositories owned by the user the token identifies. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.4 and was fixed in versions 3.0.4 2.22.10 2.21.18. This vulnerability was reported via the GitHub Bug Bounty program.

CVSS Vector

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

Reference

https://docs.github.com/en/enterprise-server@2.21/admin/release-notes#2.21.18 https://docs.github.com/en/enterprise-server@2.22/admin/release-notes#2.22.10 https://docs.github.com/en/enterprise-server@3.0/admin/release-notes#3.0.4

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

6.5