Red Hat Security Advisory 2017-2553-01 - 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.
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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
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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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