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CVE-2021-22870— Path traversal in GitHub Enterprise Server hosted Pages leads to unauthorized file read access

Quick assessment

Affected
GitHub GitHub Enterprise Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GitHub Enterprise Server 是 （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上的GitHub页面构建存在安全漏洞，攻击者可利用该漏洞读取系统文件。此漏洞影响了GitHub Enterprise Server 3.3之前的所有版本，并在3.0.19、3.1.11和3.2.3版本中修复。

AI Predicted 5.3 Difficulty: Easy EPSS 1.13% · P65
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I. Basic Information for CVE-2021-22870

Vulnerability Information
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Vulnerability Title
Path traversal in GitHub Enterprise Server hosted Pages leads to unauthorized file read access
Source: CVE Program / CVE List V5
Vulnerability Description
A path traversal vulnerability was identified in GitHub Pages builds on GitHub Enterprise Server that could allow an attacker to read system files. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.3 and was fixed in versions 3.0.19, 3.1.11, and 3.2.3. This vulnerability was reported via the GitHub Bug Bounty program.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
相对路径遍历
Source: CVE Program / CVE List V5
Vulnerability Title
GitHub Enterprise Server 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitHub Enterprise Server 是 （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上的GitHub页面构建存在安全漏洞，攻击者可利用该漏洞读取系统文件。此漏洞影响了GitHub Enterprise Server 3.3之前的所有版本，并在3.0.19、3.1.11和3.2.3版本中修复。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitHub GitHub Enterprise Server 3.0 ~ 3.0.19 -

II. Public POCs for CVE-2021-22870

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III. Intelligence Information for CVE-2021-22870

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Other References for CVE-2021-22870 (3)

IV. Related Vulnerabilities

Same product: GitHub Enterprise Server
Same vendor: GitHub
Same weakness: CWE-23

V. Comments for CVE-2021-22870

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