Vulnerability in Red Hat Keycloak
CVE-2019-3875
A vulnerability was found in keycloak before 6.0.2. The X.509 authenticator supports the verification of client certificates through the CRL, where the CRL list can be obtained from the URL provided in the certificate itself (CDP) or through the separately configured path. The CRL are often available over the network through unsecured protocols ('http' or 'ldap') and hence the caller should verify the signature and possibly the certification path. Keycloak currently doesn't validate signatures on CRL, which can result in a possibility of various attacks like man-in-the-middle.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Red Hat Keycloak — versions 6.0.2
- Red Hat Keycloak
- Red Hat Single Sign-On — versions 7.3
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Issue Tracking, Vendor Advisory)
- www.securityfocus.com/bid/108748 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2019-3875?
- CVE-2019-3875 is a medium-severity vulnerability in Red Hat Keycloak, classified under Improper Certificate Validation. CVSS score: 6.5/10. Published 2019-06-12.
- How severe is CVE-2019-3875?
- Medium severity. CVSS v3 base score is 6.5 out of 10.