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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (37.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
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
- docs.github.com/en/enterprise-server@3.8/admin/release-notes (Release Notes)
- docs.github.com/en/enterprise-server@3.7/admin/release-notes (Release Notes)
- docs.github.com/en/enterprise-server@3.6/admin/release-notes (Release Notes)
- docs.github.com/en/enterprise-server@3.5/admin/release-notes (Release Notes)
- docs.github.com/en/enterprise-server@3.4/admin/release-notes (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.