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Red Hat Security Advisory 2017-2648-01

Red Hat Security Advisory 2017-2648-01
Posted Sep 6, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2648-01 - Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote per-flow control of traffic. Security Fix: An unsigned int wrap around leading to a buffer over-read was found when parsing OFPT_QUEUE_GET_CONFIG_REPLY messages in Open vSwitch. An attacker could use this flaw to cause a remote DoS. In Open vSwitch, 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.

tags | advisory, remote, protocol
systems | linux, redhat
advisories | CVE-2017-9214, CVE-2017-9263, CVE-2017-9264, CVE-2017-9265
MD5 | abc3c45ab7bf7fe6b5c20fe9a3c12638

Red Hat Security Advisory 2017-2648-01

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

Synopsis: Moderate: openvswitch security and bug fix update
Advisory ID: RHSA-2017:2648-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2017:2648
Issue date: 2017-09-06
CVE Names: CVE-2017-9214 CVE-2017-9263 CVE-2017-9264
CVE-2017-9265
=====================================================================

1. Summary:

An update for openvswitch is now available for Red Hat OpenStack Platform
10.0 (Newton).

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 10.0 - 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 was found in the Open vSwitch (OvS) firewall
implementation. This flaw can be triggered by parsing a specially crafted
TCP, UDP, or IPv6 packet. A remote attack could use this flaw to cause a
Denial of Service (DoS). (CVE-2017-9264)

* 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/):

1431490 - openvswitch: /var/log/openvswitch is world readable
1436610 - [OVS] ofproto-dpif-xlate: Fix duplicate multicast packets
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
1457329 - CVE-2017-9264 openvswitch: Buffer over-read while parsing malformed TCP, UDP and IPv6 packets
1457335 - CVE-2017-9265 openvswitch: Buffer over-read while parsing the group mod OpenFlow message
1463732 - Update OVS 2.6.1 to fix multicast
1468334 - neutron-openvswitch-agent crashes after SIGTERM is received and openvswitch/agent are not restarted
1468631 - openvswitch segfaults when changing port VIF MTU and there's traffic flowing
1468751 - Explicit restart of openvswitch required for dpdk0 association
1472334 - [OVS] mcast-snooping: Avoid segfault for vswitchd
1472335 - [OVS] mcast-snooping: Flush ports mdb when VLAN configuration changed.
1473735 - ovs-vswitchd crashes with SIGSEGV randomly when adding/removing interfaces

6. Package List:

Red Hat OpenStack Platform 10.0:

Source:
openvswitch-2.6.1-13.git20161206.el7ost.src.rpm

noarch:
python-openvswitch-2.6.1-13.git20161206.el7ost.noarch.rpm

x86_64:
openvswitch-2.6.1-13.git20161206.el7ost.x86_64.rpm
openvswitch-debuginfo-2.6.1-13.git20161206.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-2017-9264
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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