Bug 1728609 (CVE-2019-10201)

Summary:	CVE-2019-10201 keycloak: SAML broker does not check existence of signature on document allowing any user impersonation
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	aileenc, avibelli, bgeorges, cbyrne, chazlett, cmacedo, cmoulliard, dffrench, dkreling, drieden, drusso, ggaughan, ikanello, janstey, jbalunas, jmadigan, jochrist, jpadman, jpallich, jshepherd, jwon, krathod, lthon, mszynkie, ngough, pdrozd, pgallagh, pjindal, pwright, rruss, security-response-team, sthorger, trepel, trogers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	keycloak 7.0.0	Doc Type:	If docs needed, set a value
Doc Text:	It was found that Keycloak's SAML broker did not verify missing message signatures. If an attacker modifies the SAML Response and removes the <Signature> sections, the message is still accepted, and the message can be modified. An attacker could use this flaw to impersonate other users and gain access to sensitive information.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-08-13 20:47:07 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:	1728611

Description Marian Rehak 2019-07-10 09:13:26 UTC

If an attacker modifies the SAML Response and removes the <Signature> Sections, the message is still accepted and the message can be modified, allowing the attacker to impersonate any user on the keycloak protected systems by modifying assertations.

Upstream Issue:

https://issues.jboss.org/browse/KEYCLOAK-10786

Comment 2 Chess Hazlett 2019-07-17 19:24:16 UTC

Mitigation:

Administrator can prevent this issue for POST binding by requiring signed assertions.

Comment 4 Jason Shepherd 2019-08-12 02:25:33 UTC

Red Hat Mobile Application Platform does not make use of SAML identity brokering.

Comment 9 errata-xmlrpc 2019-08-13 20:26:58 UTC

This issue has been addressed in the following products:

  Red Hat Single Sign-On 7.3.3 zip

Via RHSA-2019:2483 https://access.redhat.com/errata/RHSA-2019:2483

Comment 10 Product Security DevOps Team 2019-08-13 20:47:07 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-2019-10201

Comment 14 errata-xmlrpc 2020-05-18 10:25:09 UTC

This issue has been addressed in the following products:

  Red Hat Openshift Application Runtimes

Via RHSA-2020:2067 https://access.redhat.com/errata/RHSA-2020:2067

Comment 15 errata-xmlrpc 2020-06-04 13:06:45 UTC

This issue has been addressed in the following products:

  Red Hat Runtimes Spring Boot 2.1.12

Via RHSA-2020:2366 https://access.redhat.com/errata/RHSA-2020:2366