Auth bypass in Redhat.com Keycloak
CVE-2023-0264
A flaw was found in Keycloaks OpenID Connect user authentication, which may incorrectly authenticate requests. An authenticated attacker who could obtain information from a user request within the same realm could use that data to impersonate the victim and generate new session tokens. This issue could impact confidentiality, integrity, and availability.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.013 (69.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Redhat.com Keycloak — versions 18.0.6
- Red Hat Enterprise Linux — versions 7.0, 8.0, 9.0
- Red Hat Keycloak
- Red Hat Openshift Container Platform — versions 4.9, 4.10
- Red Hat Openshift Container Platform For IBM Linuxone — versions 4.9, 4.10
- Red Hat Openshift Container Platform IBM Z Systems — versions 4.9, 4.10
- Red Hat Single Sign-On
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/security/cve/CVE-2023-0264 (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-0264?
- CVE-2023-0264 is a medium-severity vulnerability in Redhat.com Keycloak, classified under Improper Authentication. CVSS score: 5.0/10. Published 2023-08-04.
- How severe is CVE-2023-0264?
- Medium severity. CVSS v3 base score is 5.0 out of 10.
- Is CVE-2023-0264 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.