Bug 1384112 (CVE-2016-7075)

Summary:	CVE-2016-7075 OpenShift 3: API server does not validate client-provided intermediate certificates correctly
Product:	[Other] Security Response	Reporter:	Kurt Seifried <kseifried>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	bleanhar, ccoleman, dedgar, dmcphers, jgoulding, jialiu, jkeck, joelsmith, jokerman, lmeyer, mmccomas, security-response-team, tdawson, wsun
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	It was found that Kubernetes did not correctly validate X.509 client intermediate certificate host name fields. An attacker could use this flaw to bypass authentication requirements by using a specially crafted X.509 certificate.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:00:01 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:	1384120
Bug Blocks:	1384165

Description Kurt Seifried 2016-10-12 15:06:37 UTC

Upstream reports:
Clients using SSL certs for auth show the subject CN of their intermediate cert
not their entity cert.

Reference URL:
https://github.com/kubernetes/kubernetes/issues/34517

Comment 3 errata-xmlrpc 2016-10-17 17:25:21 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Enterprise 3.1
  Red Hat OpenShift Enterprise 3.2
  Red Hat OpenShift Container Platform 3.3

Via RHSA-2016:2064 https://access.redhat.com/errata/RHSA-2016:2064