A vulnerability was found in keycloak. 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.
Name: Marek Posolda (Red Hat)
This issue has been addressed in the following products:
Red Hat Single Sign-On 7.3.2 zip
Via RHSA-2019:1456 https://access.redhat.com/errata/RHSA-2019:1456
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):
This vulnerability is out of security support scope for the following product:
> * Red Hat Mobile Application Platform
> Please refer to https://access.redhat.com/support/policy/updates/rhmap for more details
per upstream jira, fix is in keycloak 7.0.0, corrected.