Auth bypass in Github Enterprise Server
CVE-2023-23761
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.
Vulnerability class: Broken Authentication
EPSS: 0.005 (37.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N.
Affected products
- Github Enterprise Server — versions 3.4.0, 3.5.0, 3.6.0
- Github Enterprise_server — versions 3.8.0
Weakness classification (CWE)
References
- product-cna@github.com (Release Notes)
- product-cna@github.com (Release Notes)
- product-cna@github.com (Release Notes)
- product-cna@github.com (Release Notes)
- product-cna@github.com (Release Notes)
Frequently asked questions
- What is CVE-2023-23761?
- CVE-2023-23761 is a high-severity vulnerability in Github Enterprise Server, classified under Improper Authentication. CVSS score: 7.7/10. Published 2023-04-07.
- How severe is CVE-2023-23761?
- High severity. CVSS v3 base score is 7.7 out of 10.