Bug 1849584 (CVE-2020-14302) - CVE-2020-14302 keycloak: reusable "state" parameter at redirect_uri endpoint enables possibility of replay attacks
Summary: CVE-2020-14302 keycloak: reusable "state" parameter at redirect_uri endpoint ...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-14302
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1848547
TreeView+ depends on / blocked
 
Reported: 2020-06-22 10:28 UTC by Paramvir jindal
Modified: 2023-09-25 07:12 UTC (History)
37 users (show)

See Also:
Fixed In Version: keycloak 13.0.0
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in Keycloak, where an external identity provider, after successful authentication, redirects to a Keycloak endpoint that accepts multiple invocations with the use of the same "state" parameter. This flaw allows a malicious user to perform replay attacks.
Clone Of:
Environment:
Last Closed: 2021-03-23 17:35:36 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:0967 0 None None None 2021-03-23 13:59:37 UTC
Red Hat Product Errata RHSA-2021:0968 0 None None None 2021-03-23 13:58:56 UTC
Red Hat Product Errata RHSA-2021:0969 0 None None None 2021-03-23 14:08:45 UTC
Red Hat Product Errata RHSA-2021:0974 0 None None None 2021-03-23 14:18:20 UTC

Description Paramvir jindal 2020-06-22 10:28:08 UTC 
Beside its core functionality as Identity Provider, Keycloak implements the OIDC Service Provider part of the specification for the _identity brokerage_ feature.
 In doing so, Keycloak provides dedicated _redirect_uris_ for each configured OIDC IdP: [https://keycloak.local/auth/realms/]{realm}}/broker/\{alias}/endpoint

The _redirect_uri_ endpoint does not invalidate "state" values if they are redeemed multiple times. As a result, multiple request to this endpoint including one valid "state" value result in request to the IdPs Token Endpoint being initiated by Keycloak.

Jira: https://issues.redhat.com/browse/KEYCLOAK-14483
Comment 1 Paramvir jindal 2020-06-22 10:28:25 UTC 
Acknowledgments:

Name: Lauritz Holtmann (@_lauritz_) (Chair for Network and Data Security at Ruhr University Bochum)
Comment 3 Paramvir jindal 2020-06-22 12:23:28 UTC 
RHSSO 7.4 is affected by this.
Comment 6 errata-xmlrpc 2021-03-23 13:58:54 UTC 
This issue has been addressed in the following products:

  Red Hat Single Sign-On 7.4 for RHEL 7

Via RHSA-2021:0968 https://access.redhat.com/errata/RHSA-2021:0968
Comment 7 errata-xmlrpc 2021-03-23 13:59:36 UTC 
This issue has been addressed in the following products:

  Red Hat Single Sign-On 7.4 for RHEL 6

Via RHSA-2021:0967 https://access.redhat.com/errata/RHSA-2021:0967
Comment 8 errata-xmlrpc 2021-03-23 14:08:45 UTC 
This issue has been addressed in the following products:

  Red Hat Single Sign-On 7.4 for RHEL 8

Via RHSA-2021:0969 https://access.redhat.com/errata/RHSA-2021:0969
Comment 9 errata-xmlrpc 2021-03-23 14:17:51 UTC 
This issue has been addressed in the following products:

  Red Hat Single Sign-On 7.4.6

Via RHSA-2021:0974 https://access.redhat.com/errata/RHSA-2021:0974
Comment 10 Product Security DevOps Team 2021-03-23 17:35:36 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-14302
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