Bug 1702953 (CVE-2019-10157)

Summary:	CVE-2019-10157 keycloak: Node.js adapter internal NBF can be manipulated leading to DoS.
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	aileenc, avibelli, bgeorges, cbyrne, chazlett, cmacedo, cmoulliard, dffrench, drieden, drusso, ikanello, janstey, jbalunas, jmadigan, jochrist, jpallich, jshepherd, krathod, lthon, mszynkie, ngough, pdrozd, pgallagh, psampaio, pwright, rruss, security-response-team, sthorger, trepel, trogers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	keycloak-nodejs-connect 4.8.3	Doc Type:	If docs needed, set a value
Doc Text:	It was found that Keycloak's Node.js adapter did not properly verify the web token received from the server in its backchannel logout. An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-07-12 13:07:06 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:	1702955

Description Marian Rehak 2019-04-25 09:08:49 UTC

The admin backchannel logout route (/k_logout) doesn't verify the signature of the JWT it receives from Keycloak. This causes to the adapter to update the grant manager with a NBF in the future. This effectively logs users out of the app and prevents them from logging in again. Since the tokens received from the code exchange will appear to be in the future, this could be used maliciously against applications using the adapter.

Upstream patch:

https://github.com/keycloak/keycloak-nodejs-connect/commit/55e54b55d05ba636bc125a8f3d39f0052d13f8f6

Comment 4 errata-xmlrpc 2019-06-11 15:32:36 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 13:07:06 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-2019-10157

Comment 6 Jason Shepherd 2019-08-08 07:24:22 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