Auth bypass in Red Hat Build Of Keycloak 22
CVE-2023-6787
A flaw was found in Keycloak that occurs from an error in the re-authentication mechanism within org.keycloak.authentication. This flaw allows hijacking an active Keycloak session by triggering a new authentication process with the query parameter "prompt=login," prompting the user to re-enter their credentials. If the user cancels this re-authentication by selecting "Restart login," an account takeover may occur, as the new session, with a different SUB, will possess the same SID as the previous session.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (53.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Red Hat Build Of Keycloak 22 — versions 22.0.10-1, 22-13, 22-16
- Red Hat Build Of Keycloak 22.0.10
- Red Hat Single Sign-On 7
- Red Hat Build Of Keycloak
- Red Hat Keycloak
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2024:1867 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2024:1868 (vendor-advisory, Vendor Advisory)
- access.redhat.com/security/cve/CVE-2023-6787 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking, Vendor Advisory)
- github.com/keycloak/keycloak/security/advisories/GHSA-c9h6-v78w-52wj (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-6787?
- CVE-2023-6787 is a medium-severity vulnerability in Red Hat Build Of Keycloak 22, classified under Improper Authentication. CVSS score: 6.5/10. Published 2024-04-25.
- How severe is CVE-2023-6787?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2023-6787 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.