Description
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.
Remediation
References
http://www.securityfocus.com/bid/108748
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3875
Related Vulnerabilities
CVE-2023-37956 Vulnerability in maven package org.jenkins-ci.plugins:test-results-aggregator
CVE-2015-0254 Vulnerability in maven package javax.servlet:jstl
CVE-2016-10696 Vulnerability in npm package windows-latestchromedriver
CVE-2020-28424 Vulnerability in npm package s3-kilatstorage
CVE-2022-31172 Vulnerability in maven package org.webjars.npm:openzeppelin__contracts