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CVE-2023-23761— Improper authentication vulnerability in GitHub Enterprise Server leading to modification of secret gists

Quick assessment

Affected
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存在授权问题漏洞，该漏洞源于存在不正确的身份验证漏洞，允许未经授权的行为者通过SSH证书授权认证来修改其他用户的秘密清单。

CVSS 7.7 · High EPSS 0.46% · P38

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2023-23761

Vulnerability Information
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Vulnerability Title
Improper authentication vulnerability in GitHub Enterprise Server leading to modification of secret gists
Source: CVE Program / CVE List V5
Vulnerability Description
An improper authentication vulnerability was identified in GitHub Enterprise Server that allowed an unauthorized actor to modify other users' secret gists by authenticating through an SSH certificate authority. To do so, a user had to know the secret gist's URL. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.9 and was fixed in versions 3.4.18, 3.5.15, 3.6.11, 3.7.8, and 3.8.1. This vulnerability was reported via the GitHub Bug Bounty program.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
GitHub Enterprise Server 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
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存在授权问题漏洞，该漏洞源于存在不正确的身份验证漏洞，允许未经授权的行为者通过SSH证书授权认证来修改其他用户的秘密清单。
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 Enterprise Server 3.4.0 ~ 3.4.17 -

II. Public POCs for CVE-2023-23761

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III. Intelligence Information for CVE-2023-23761

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Other References for CVE-2023-23761 (5)

IV. Related Vulnerabilities

Same product: Enterprise Server
Same vendor: GitHub
Same weakness: CWE-287

V. Comments for CVE-2023-23761

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