Skip to content
Fencer Intel
medium 5.4

CVE-2018-10894 json

Keycloak Authentication Error

published 8y ago modified 4mo ago also GHSA-xvv8-8wh9-9fh2 , EUVD-2022-5865

cvss
5.4
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

It was found that SAML authentication in Keycloak 3.4.3.Final incorrectly authenticated expired certificates. A malicious user could use this to access unauthorized data or possibly conduct further attacks.

Patch / fix

  • maven org.keycloak:keycloak-saml-adapter-core 4.4.0.Final
  • maven org.keycloak:keycloak-services 4.4.0.Final
  • rh-sso7-keycloak red hat single sign on 7 3.4.14-1.Final_redhat_00001.1.jbcs.el7
  • rh-sso7-keycloak-server red hat single sign on 7 3.4.14-1.Final_redhat_00001.1.jbcs.el7
  • rh-sso7-keycloak red hat single sign on 7 3.4.14-1.Final_redhat_00001.1.jbcs.el6
  • rh-sso7-keycloak-server red hat single sign on 7 3.4.14-1.Final_redhat_00001.1.jbcs.el6

red hat advisories RHSA-2018:3593RHSA-2018:3592

Is CVE-2018-10894 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-10894 updated cvss 5.4

keycloak: auth permitted with expired certs in SAML client

  • Red Hat Fuse 7 keycloak keycloak
    affected: no fix planned “Will not fix”
  • Red Hat Mobile Application Platform 4 keycloak
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Application Runtimes keycloak keycloak
    affected: no fix available
  • Red Hat Single Sign-On 7.2 for RHEL 6 Server rh-sso7-keycloak 3.4.14-1.Final_redhat_00001.1.jbcs.el6, rh-sso7-keycloak-server 3.4.14-1.Final_redhat_00001.1.jbcs.el6
    fixed: vendor fix RHSA-2018:3592
  • Red Hat Single Sign-On 7.2 for RHEL 7 Server rh-sso7-keycloak 3.4.14-1.Final_redhat_00001.1.jbcs.el7, rh-sso7-keycloak-server 3.4.14-1.Final_redhat_00001.1.jbcs.el7
    fixed: vendor fix RHSA-2018:3593
  • Red Hat Single Sign-On 7.2.5 zip
    fixed: vendor fix RHSA-2018:3595
  • Red Hat Text-Only RHOAR
    fixed: vendor fix RHSA-2019:0877

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
NVD 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
NVD 2.0 5.5 AV:N/AC:L/Au:S/C:P/I:P/A:N
GitHub 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven org.keycloak:keycloak-saml-adapter-core
<4.4.0.Final
4.4.0.Final
maven org.keycloak:keycloak-services
<4.4.0.Final
4.4.0.Final

Affected products

  • Red Hat keycloak

Classification

Weakness
  • CWE-345 Insufficient Verification of Data Authenticity
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.