CVE-2021-22863— GitHub Enterprise Server 安全漏洞
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一、 漏洞 CVE-2021-22863 基础信息
漏洞信息
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Vulnerability Title
Improper access control in GitHub Enterprise Server leading to unauthorized changes to maintainer permissions on pull requests
来源: CVE Program / CVE List V5
Vulnerability Description
An improper access control vulnerability was identified in the GitHub Enterprise Server GraphQL API that allowed authenticated users of the instance to modify the maintainer collaboration permission of a pull request without proper authorization. By exploiting this vulnerability, an attacker would be able to gain access to head branches of pull requests opened on repositories of which they are a maintainer. Forking is disabled by default for organization owned private repositories and would prevent this vulnerability. Additionally, 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 2.12.22 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.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
来源: CVE Program / CVE List V5
Vulnerability Title
GitHub Enterprise Server 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
GitHub Enterprise Server是美国GitHub开源的一个应用软件。提供一个将自己的GitHub实例设置为虚拟设备，从而提供可扩展，易于管理的平台。 GitHub Enterprise Server GraphQL API 存在安全漏洞，该漏洞允许实例的经过身份验证的用户在没有适当授权的情况下修改pull请求的维护者协作权限。以下产品及版本受到影响：GitHub Enterprise Server since 2.12.22 and was fixed in versions 2.20.
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| GitHub | GitHub Enterprise Server | 2.20 ~ 2.20.24 | - |
二、漏洞 CVE-2021-22863 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2021-22863 其他参考 (2)
同批安全公告 · GitHub · 2021-03-03 · 共 4 条
| CVE-2020-10519 | GitHub 命令注入漏洞 | |
| CVE-2021-22861 | GitHub Enterprise Server 安全漏洞 | |
| CVE-2021-22862 | GitHub Enterprise Server 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-22863
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