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ESB-2016.0575 - [RedHat] kubernetes: Increased privileges - Existing account

Date: 04 March 2016
References: ESB-2016.0182  

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0575
                   Moderate: kubernetes security update
                               4 March 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           kubernetes
Publisher:         Red Hat
Operating System:  Red Hat
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-1906 CVE-2016-1905 

Reference:         ESB-2016.0182

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2016:0351

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: kubernetes security update
Advisory ID:       RHSA-2016:0351-01
Product:           Red Hat OpenShift Enterprise
Advisory URL:      https://access.redhat.com/errata/RHSA-2016:0351
Issue date:        2016-03-03
CVE Names:         CVE-2016-1905 CVE-2016-1906 
=====================================================================

1. Summary:

Updated kubernetes packages that fix two security issues are now 
available for Red Hat OpenShift Enterprise 3.0.2.

Red Hat Product Security has rated this update as having Moderate 
security impact. Common Vulnerability Scoring System (CVSS) base 
scores, which give detailed severity ratings, are available for each 
vulnerability from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat OpenShift Enterprise 3.0 - x86_64

3. Description:

OpenShift Enterprise by Red Hat is the company's cloud computing
Platform-as-a-Service (PaaS) solution designed for on-premise or 
private cloud deployments.

An authorization flaw was discovered in Kubernetes; the API server did 
not properly check user permissions when handling certain requests. An
authenticated remote attacker could use this flaw to gain additional 
access to resources such as RAM and disk space. (CVE-2016-1905)

An authorization flaw was discovered in Kubernetes; the API server did 
not properly check user permissions when handling certain build
configuration strategies. A remote attacker could create build 
configurations with strategies that violate policy. Although the attacker
could not launch the build themselves (launch fails when the 
policy is violated), if the build configuration files were later 
launched by other privileged services (such as automated triggers), 
user privileges could be bypassed allowing attacker escalation. 
(CVE-2016-1906)

All OpenShift Enterprise 3.0 users are advised to upgrade to these 
updated packages.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

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

5. Bugs fixed (https://bugzilla.redhat.com/):

1297910 - CVE-2016-1905 Kubernetes api server: patch operation should use patched object to check admission control
1297916 - CVE-2016-1906 Kubernetes api server: build config to a strategy that isn't allowed by policy

6. Package List:

Red Hat OpenShift Enterprise 3.0:

Source:
openshift-3.0.2.0-0.git.45.423f434.el7ose.src.rpm

x86_64:
openshift-3.0.2.0-0.git.45.423f434.el7ose.x86_64.rpm
openshift-clients-3.0.2.0-0.git.45.423f434.el7ose.x86_64.rpm
openshift-master-3.0.2.0-0.git.45.423f434.el7ose.x86_64.rpm
openshift-node-3.0.2.0-0.git.45.423f434.el7ose.x86_64.rpm
openshift-sdn-ovs-3.0.2.0-0.git.45.423f434.el7ose.x86_64.rpm
tuned-profiles-openshift-node-3.0.2.0-0.git.45.423f434.el7ose.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2016-1905
https://access.redhat.com/security/cve/CVE-2016-1906
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2016 Red Hat, Inc.
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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
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===========================================================================
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