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CVE-2021-22862

Improper access control in GitHub Enterprise Server leading to the disclosure of Actions secrets to forks

Published: Mar 3, 2021Updated: Nov 21, 2024 Sources: CVE List NVDCWE-285
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.8%
Top 47.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

An improper access control vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with the ability to fork a repository to disclose Actions secrets for the parent repository of the fork. This vulnerability existed due to a flaw that allowed the base reference of a pull request to be updated to point to an arbitrary SHA or another pull request outside of the fork repository. By establishing this incorrect reference in a PR, the restrictions that limit the Actions secrets sent a workflow from forks could be bypassed. This vulnerability affected GitHub Enterprise Server version 3.0.0, 3.0.0.rc2, and 3.0.0.rc1. This vulnerability was reported via the GitHub Bug Bounty program.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-285NVD-CWE-Other

Affected Products

GitHub Enterprise ServerGitHubDevTools & CI
githubgithubDevTools & CI
githubcommercialUSDevTools & CIaka github

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.1
docs.github.com

Timeline

Published
Mar 3, 2021
Last Updated
Nov 21, 2024

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