Bug 1384112 (CVE-2016-7075) - CVE-2016-7075 OpenShift 3: API server does not validate client-provided intermediate certificates correctly
Summary: CVE-2016-7075 OpenShift 3: API server does not validate client-provided inter...
Alias: CVE-2016-7075
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1384120
Blocks: 1384165
TreeView+ depends on / blocked
Reported: 2016-10-12 15:06 UTC by Kurt Seifried
Modified: 2019-09-29 13:57 UTC (History)
14 users (show)

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.
Clone Of:
Last Closed: 2019-06-08 03:00:01 UTC

Attachments (Terms of Use)

System ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2064 normal SHIPPED_LIVE Important: atomic-openshift security update 2016-10-17 21:24:45 UTC

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:

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

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