ESB-2017.2168 - [RedHat] openvswitch: Denial of service - Remote/unauthenticated 2017-08-31

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2168
                   Moderate: openvswitch security update
                              31 August 2017

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

Product:           openvswitch
Publisher:         Red Hat
Operating System:  Red Hat
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-9265 CVE-2017-9263 CVE-2017-9214

Reference:         ESB-2017.2086
                   ESB-2017.1930

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2017:2553

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                   Red Hat Security Advisory

Synopsis:          Moderate: openvswitch security update
Advisory ID:       RHSA-2017:2553-01
Product:           Red Hat Enterprise Linux OpenStack Platform
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:2553
Issue date:        2017-08-30
CVE Names:         CVE-2017-9214 CVE-2017-9263 CVE-2017-9265 
=====================================================================

1. Summary:

An update for openvswitch is now available for Red Hat OpenStack Platform
9.0 (Mitaka).

Red Hat Product Security has rated this update as having a security impact
of Moderate. 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.

2. Relevant releases/architectures:

Red Hat OpenStack Platform 9.0 - noarch, x86_64

3. Description:

Open vSwitch provides standard network bridging functions and support for
the OpenFlow protocol for remote per-flow control of traffic.

Security Fix(es):

* An unsigned int wrap around leading to a buffer over-read was found when
parsing OFPT_QUEUE_GET_CONFIG_REPLY messages in Open vSwitch (OvS). An
attacker could use this flaw to cause a remote DoS. (CVE-2017-9214)

* In Open vSwitch (OvS), while parsing an OpenFlow role status message
there is a call to the abort() function for undefined role status reasons
in the function `ofp_print_role_status_message` in `lib/ofp-print.c` that
may be leveraged toward a remote DoS attack by a malicious switch.
(CVE-2017-9263)

* A buffer over-read flaw was found in Open vSwitch (OvS) while parsing the
group mod OpenFlow messages sent from the controller. An attacker could use
this flaw to cause a Denial of Service (DoS). (CVE-2017-9265)

4. 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

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

1431494 - openvswitch: /var/log/openvswitch is world readable
1456795 - CVE-2017-9214 openvswitch: Integer underflow in the ofputil_pull_queue_get_config_reply10 function
1457327 - CVE-2017-9263 openvswitch: Invalid processing of a malicious OpenFlow role status message
1457335 - CVE-2017-9265 openvswitch: Buffer over-read while parsing the group mod OpenFlow message

6. Package List:

Red Hat OpenStack Platform 9.0:

Source:
openvswitch-2.5.0-15.git20160727.el7ost.src.rpm

noarch:
python-openvswitch-2.5.0-15.git20160727.el7ost.noarch.rpm

x86_64:
openvswitch-2.5.0-15.git20160727.el7ost.x86_64.rpm
openvswitch-debuginfo-2.5.0-15.git20160727.el7ost.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-2017-9214
https://access.redhat.com/security/cve/CVE-2017-9263
https://access.redhat.com/security/cve/CVE-2017-9265
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 2017 Red Hat, Inc.
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