Bug 1849584 (CVE-2020-14302)

Summary:	CVE-2020-14302 keycloak: reusable "state" parameter at redirect_uri endpoint enables possibility of replay attacks
Product:	[Other] Security Response	Reporter:	Paramvir jindal <pjindal>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	aboyko, aileenc, akoufoud, alazarot, almorale, anstephe, avibelli, bgeorges, chazlett, cmoulliard, dkreling, drieden, etirelli, ggaughan, gmalinko, ibek, ikanello, janstey, jbalunas, jochrist, jpallich, jstastny, jwon, krathod, kverlaen, lthon, mnovotny, mszynkie, pdrozd, pgallagh, pjindal, rrajasek, rruss, rsynek, sdaley, security-response-team, sthorger
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
See Also:	https://issues.redhat.com/browse/KEYCLOAK-14539
Whiteboard:
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.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-03-23 17:35:36 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1848547

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