RHSA-2018:2906 - Security Advisory

Topic

An update is now available for Red Hat OpenShift Container Platform release 3.7.

Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments.

Security Fix(es):

• A privilege escalation vulnerability exists in OpenShift Container Platform 3.x which allows for compromise of pods running on a compute node to which a pod is scheduled with normal user privilege. This access could include access to all secrets, pods, environment variables, running pod/container processes, and persistent volumes, including in privileged containers. Additionally, on versions 3.6 and higher of OpenShift Container Platform, this vulnerability allows cluster-admin level access to any API hosted by an aggregated API server. This includes the ‘servicecatalog’ API which is installed by default in 3.7 and later. Cluster-admin level access to the service catalog allows creation of brokered services by an unauthenticated user with escalated privileges in any namespace and on any node. This could lead to an attacker being allowed to deploy malicious code, or alter existing services. (CVE-2018-1002105)
• atomic-openshift: oc patch with json causes masterapi service crash (CVE-2018-14632)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Red Hat would like to thank Lars Haugan for reporting CVE-2018-14632.

Space precludes documenting all of the bug fixes and enhancements in this advisory. See the following Release Notes documentation for details about these changes:

https://docs.openshift.com/container-platform/3.7/release_notes/ocp_3_7_release_notes.html

All OpenShift Container Platform 3.7 users are advised to upgrade to these updated packages and images.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat OpenShift Container Platform 3.7 x86_64

Fixes

• BZ - 1585767 - [3.7] Node IP update should update Host IP in HostSubnet resource
• BZ - 1616150 - [3.7] [RHEL-7.6] Failed to execute iptables-restore: exit status 1 (iptables-restore: invalid option -- '5'
• BZ - 1620817 - [3.7] tuned profile does not take effect in RHEL7.5
• BZ - 1622336 - etcd migrate playbook fail if controllerLeaseTTL has 0s in master-config.yaml
• BZ - 1625885 - CVE-2018-14632 atomic-openshift: oc patch with json causes masterapi service crash
• BZ - 1648138 - CVE-2018-1002105 kubernetes: authentication/authorization bypass in the handling of non-101 responses

CVEs

• CVE-2018-14632
• CVE-2018-1002105

References

• https://access.redhat.com/security/updates/classification/#critical
• https://access.redhat.com/security/vulnerabilities/3716411
• https://docs.openshift.com/container-platform/3.7/release_notes/ocp_3_7_release_notes.html