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Fencer Intel
high 7.5

CVE-2016-7075 json

It was found that Kubernetes as used by Openshift Enterprise 3 did not correctly validate X.509 client intermediate certificate host name f…

published 2018-09-10 8 y ago modified 2026-06-17 4 mo ago also EUVD-2016-7955

cvss
7.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

It was found that Kubernetes as used by Openshift Enterprise 3 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.

Patch / fix

  • kubernetes Debian 14, Debian 13, Debian 12 1.5.5+dfsg-1

debian advisories DEBIAN-CVE-2016-7075

  • atomic-openshift openshift 3.1 3.1.1.8-1.git.0.d469026.el7aos
  • atomic-openshift openshift 3.2 3.2.1.17-1.git.0.6d01b60.el7
  • atomic-openshift openshift 3.3 3.3.0.35-1.git.0.d7bd9b6.el7
  • atomic-openshift-pod openshift 3.1 3.1.1.8-1.git.0.d469026.el7aos
  • atomic-openshift-pod openshift 3.2 3.2.1.17-1.git.0.6d01b60.el7
  • atomic-openshift-pod openshift 3.3 3.3.0.35-1.git.0.d7bd9b6.el7
  • atomic-openshift-node openshift 3.1 3.1.1.8-1.git.0.d469026.el7aos
  • atomic-openshift-node openshift 3.2 3.2.1.17-1.git.0.6d01b60.el7

red hat advisories RHSA-2016:2064

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-7075 updated cvss 7.5

3: API server does not validate client-provided intermediate certificates correctly

  • Red Hat OpenShift Container Platform 3.2 atomic-openshift 3.2.1.17-1.git.0.6d01b60.el7, atomic-openshift-pod 3.2.1.17-1.git.0.6d01b60.el7, atomic-openshift-node 3.2.1.17-1.git.0.6d01b60.el7, atomic-openshift-tests 3.2.1.17-1.git.0.6d01b60.el7, atomic-openshift-master 3.2.1.17-1.git.0.6d01b60.el7, atomic-openshift-clients 3.2.1.17-1.git.0.6d01b60.el7, +5 more Red Hat OpenShift Container Platform 3.3 atomic-openshift 3.3.0.35-1.git.0.d7bd9b6.el7, atomic-openshift-pod 3.3.0.35-1.git.0.d7bd9b6.el7, atomic-openshift-node 3.3.0.35-1.git.0.d7bd9b6.el7, atomic-openshift-tests 3.3.0.35-1.git.0.d7bd9b6.el7, atomic-openshift-master 3.3.0.35-1.git.0.d7bd9b6.el7, atomic-openshift-clients 3.3.0.35-1.git.0.d7bd9b6.el7, +4 more Red Hat OpenShift Enterprise 3.1 atomic-openshift 3.1.1.8-1.git.0.d469026.el7aos, atomic-openshift-pod 3.1.1.8-1.git.0.d469026.el7aos, atomic-openshift-node 3.1.1.8-1.git.0.d469026.el7aos, atomic-openshift-master 3.1.1.8-1.git.0.d469026.el7aos, atomic-openshift-clients 3.1.1.8-1.git.0.d469026.el7aos, atomic-openshift-recycle 3.1.1.8-1.git.0.d469026.el7aos, +4 more
    fixed: vendor fix RHSA-2016:2064

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.57% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/kubernetes/kubernetes/issues/34517 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • Red Hat OpenShift

Classification

Weakness
  • CWE-295 Improper Certificate Validation
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.