Bug 1812514 (CVE-2020-1758)

Summary:	CVE-2020-1758 keycloak: improper verification of certificate with host mismatch could result in information disclosure
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aboyko, aileenc, avibelli, bgeorges, chazlett, cmoulliard, dbecker, dkreling, drieden, ggaughan, gmalinko, ikanello, janstey, jbalunas, jjoyce, jochrist, jpallich, jschluet, jwon, kbasil, krathod, lhh, lpeer, lthon, mburns, mszynkie, pdrozd, pgallagh, pjindal, rruss, sclewis, security-response-team, slinaber, sthorger
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	keycloak 10.0.0	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in Keycloak, where it does not perform the TLS hostname verification while sending emails using the SMTP server. This flaw allows an attacker to perform a man-in-the-middle (MITM) attack.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-05-12 22:32:08 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:	1812517

Description Michael Kaplan 2020-03-11 13:37:09 UTC

Keycloak does not perform TLS hostname verification when sending emails via an SMTP server which could result in information disclosure.

External Reference:

https://issues.redhat.com/browse/KEYCLOAK-13285

Comment 3 Paramvir jindal 2020-03-12 06:55:47 UTC

Mitigation:

Turn off all kinds of email notifications including password reset mails.

Comment 7 errata-xmlrpc 2020-05-12 16:39:47 UTC

This issue has been addressed in the following products:

  Red Hat Single Sign-On 7.3 for RHEL 7

Via RHSA-2020:2107 https://access.redhat.com/errata/RHSA-2020:2107

Comment 8 errata-xmlrpc 2020-05-12 16:40:13 UTC

This issue has been addressed in the following products:

  Red Hat Single Sign-On 7.3 for RHEL 6

Via RHSA-2020:2106 https://access.redhat.com/errata/RHSA-2020:2106

Comment 9 errata-xmlrpc 2020-05-12 16:40:28 UTC

This issue has been addressed in the following products:

  Red Hat Single Sign-On 7.3 for RHEL 8

Via RHSA-2020:2108 https://access.redhat.com/errata/RHSA-2020:2108

Comment 10 errata-xmlrpc 2020-05-12 17:17:33 UTC

This issue has been addressed in the following products:

  Red Hat Single Sign On 7.3.8

Via RHSA-2020:2112 https://access.redhat.com/errata/RHSA-2020:2112

Comment 11 Product Security DevOps Team 2020-05-12 22:32:08 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-2020-1758

Comment 13 Paramvir jindal 2020-05-18 14:05:29 UTC

Acknowledgments:

Name: Peter Stöckli