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CVE

CVE-2023-23761

An improper authentication vulnerability was identified in GitHub Enterprise Server that allowed an unauthorized actor t

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.

HIGH · CVSS 7.7 EPSS 0.00123
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-287Improper Authentication
CWE-287Improper Authentication
▤

Affected Products & Versions

5
github enterprise server< 3.4.18
github enterprise server>= 3.5.0 and < 3.5.15
github enterprise server>= 3.6.0 and < 3.6.11
github enterprise server>= 3.7.0 and < 3.7.8
github enterprise serverall versions
▣

Scoring & Timeline

7.7
HIGH · CVSS v3.1 · product-cna@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 Apr 2023 · 07:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://docs.github.com/en/enterprise-server@3.4/admin/release-notes#3.4.18Release Notes
https://docs.github.com/en/enterprise-server@3.5/admin/release-notes#3.5.15Release Notes
https://docs.github.com/en/enterprise-server@3.6/admin/release-notes#3.6.11Release Notes
https://docs.github.com/en/enterprise-server@3.7/admin/release-notes#3.7.8Release Notes
https://docs.github.com/en/enterprise-server@3.8/admin/release-notes#3.8.1Release Notes
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