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CVE-2021-41598— UI misrepresentation of granted permissions in GitHub Enterprise Server leading to unauthorized access to user

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 存在安全漏洞，该漏洞源于在 GitHub Enterprise Server 中发现了一个 UI 虚假陈述漏洞，该漏洞允许在 GitHub 应用程序的用户授权 Web 流程期间授予比在批准期间向用户显示的权限更多的权限。

AI Predicted 5.3 Difficulty: Hard EPSS 1.15% · P66

Possible ATT&CK Techniques 1 AI

T1502.001
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I. Basic Information for CVE-2021-41598

Vulnerability Information
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Vulnerability Title
UI misrepresentation of granted permissions in GitHub Enterprise Server leading to unauthorized access to user
Source: CVE Program / CVE List V5
Vulnerability Description
A UI misrepresentation vulnerability was identified in GitHub Enterprise Server that allowed more permissions to be granted during a GitHub App's user-authorization web flow than was displayed to the user during approval. To exploit this vulnerability, an attacker would need to create a GitHub App on the instance and have a user authorize the application through the web authentication flow. All permissions being granted would properly be shown during the first authorization, but if the user later updated the set of repositories the app was installed on after the GitHub App had configured additional user-level permissions, those additional permissions would not be displayed, leading to more permissions being granted than the user potentially intended. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.3 and was fixed in versions 3.2.5, 3.1.13, 3.0.21. 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
关键信息的UI错误表达
Source: CVE Program / CVE List V5
Vulnerability Title
GitHub Enterprise Server 安全漏洞
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 存在安全漏洞，该漏洞源于在 GitHub Enterprise Server 中发现了一个 UI 虚假陈述漏洞，该漏洞允许在 GitHub 应用程序的用户授权 Web 流程期间授予比在批准期间向用户显示的权限更多的权限。
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 ~ 3.0.21 -

II. Public POCs for CVE-2021-41598

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III. Intelligence Information for CVE-2021-41598

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Other References for CVE-2021-41598 (3)

IV. Related Vulnerabilities

Same product: GitHub Enterprise Server
Same vendor: GitHub
Same weakness: CWE-451

V. Comments for CVE-2021-41598

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