CVE-2018-10894 Keycloak Authentication Error

What is CVE-2018-10894?

CVE-2018-10894 is a medium-severity authentication bypass vulnerability in Redhat Keycloak, published on 1 Aug 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Weakness: CWE-295, CWE-345

Which versions are affected by CVE-2018-10894?

4 open source packages ship an affected version, including org.keycloak:keycloak-saml-adapter-core and org.keycloak:keycloak-services. It affects 2 products.

Products include Redhat Keycloak, Redhat Single Sign-On.

How do I fix CVE-2018-10894?

Upgrade org.keycloak:keycloak-saml-adapter-core to 4.4.0.Final or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2018-10894 being exploited?

There is no known exploitation of CVE-2018-10894 in the wild and no public exploit code.

Other vulnerabilities in Redhat Keycloak

• CVE-2022-4361 Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC Critical 10.0
• CVE-2022-1245 Keycloak vulnerable to privilege escalation on Token Exchange feature Critical 9.8
• CVE-2021-20195 keycloak Self Stored Cross-site Scripting vulnerability Critical 9.6
• CVE-2019-14910 Keycloak Authentication Error Critical 9.3
• CVE-2019-14909 Keycloak Authentication Error Critical 9.3

All Redhat Keycloak vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-xvv8-8wh9-9fh2.