CVE-2021-22869 - CVE House

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Status published Critical CVE-2021-22869

Improper access control in GitHub Enterprise Server allows self-hosted runners to execute outside their control group

9.8 CVSS

Vulnerability Description

An improper access control vulnerability in GitHub Enterprise Server allowed a workflow job to execute in a self-hosted runner group it should not have had access to. This affects customers using self-hosted runner groups for access control. A repository with access to one enterprise runner group could access all of the enterprise runner groups within the organization because of improper authentication checks during the request. This could cause code to be run unintentionally by the incorrect runner group. This vulnerability affected GitHub Enterprise Server versions from 3.0.0 to 3.0.15 and 3.1.0 to 3.1.7 and was fixed in 3.0.16 and 3.1.8 releases.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from GitHub

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Incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed read-only access

Incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed unauthorized read-only access

GitHub Enterprise Server Information Disclosure Vulnerability Exposes Private Repository Names via Search API

Pre-Receive Hook Remote Code Execution vulnerability was identified in GitHub Enterprise Server that allowing Privilege Escalation

Markdown math block sanitization bypass allows privilege escalation and unauthorized workflow triggers

Affected Vendor

GitHub

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Affected Software

GitHub Enterprise Server

Vulnerable Versions:

3.0, 3.1

Timeline

Official Publish: September 24th, 2021

Last Modified: August 3rd, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1213 Data from Information Repositories

T1005 Data from Local System

T1078 Valid Accounts