Bug 1690628 (CVE-2019-3875) - CVE-2019-3875 keycloak: missing signatures validation on CRL used to verify client certificates
Summary: CVE-2019-3875 keycloak: missing signatures validation on CRL used to verify c...
Alias: CVE-2019-3875
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On:
Blocks: 1690630
TreeView+ depends on / blocked
Reported: 2019-03-19 20:50 UTC by Laura Pardo
Modified: 2020-01-22 21:44 UTC (History)
35 users (show)

Fixed In Version: keycloack 7.0.0
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2019-07-12 13:06:48 UTC

Attachments (Terms of Use)

System ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:1456 None None None 2019-06-11 15:32:33 UTC

Description Laura Pardo 2019-03-19 20:50:59 UTC
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.


Upstream patch:


Comment 1 Laura Pardo 2019-03-25 21:49:20 UTC

Name: Marek Posolda (Red Hat)

Comment 4 errata-xmlrpc 2019-06-11 15:32:32 UTC
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

Comment 5 Product Security DevOps Team 2019-07-12 13:06:48 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


Comment 6 Jason Shepherd 2019-08-08 05:59:38 UTC
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

Comment 7 Chess Hazlett 2019-12-09 22:32:08 UTC
per upstream jira, fix is in keycloak 7.0.0, corrected.

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