CVE-2021-22861 (GCVE-0-2021-22861)
Vulnerability from cvelistv5 – Published: 2021-03-03 03:25 – Updated: 2024-08-03 18:51
VLAI?
Title
Improper access control in GitHub Enterprise Server leading to unauthorized write access to forkable repositories
Summary
An improper access control vulnerability was identified in GitHub Enterprise Server that allowed authenticated users of the instance to gain write access to unauthorized repositories via specifically crafted pull requests and REST API requests. An attacker would need to be able to fork the targeted repository, a setting that is disabled by default for organization owned private repositories. 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 2.4.21 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.
Severity ?
No CVSS data available.
CWE
- CWE-285 - Improper Authorization
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| GitHub | GitHub Enterprise Server |
Affected:
2.20 , < 2.20.24
(custom)
Affected: 2.21 , < 2.21.15 (custom) Affected: 2.22 , < 2.22.7 (custom) Affected: 3.0 , < 3.0.1 (custom) |
Credits
Teddy Katz
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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