RHEL 7 : openvswitch (RHSA-2018:3500)

Medium Nessus Plugin ID 118745

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

An update for openvswitch is now available for Fast Datapath for Red
Hat Enterprise Linux 7.

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.

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

Security Fix(es) :

* openvswitch: Mishandle of group mods in lib/
ofp-util.c:parse_group_prop_ntr_selection_method() allows for
assertion failure (CVE-2018-17204)

* openvswitch: Error during bundle commit in ofproto/
ofproto.c:ofproto_rule_insert__() allows for crash (CVE-2018-17205)

* openvswitch: Buffer over-read in lib/ofp-actions.c:decode_bundle()
(CVE-2018-17206)

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.

Bug Fix(es) :

* Previously, when the ovs-vswitchd service restarted, an error
displayed with many open files. With this update, the number of
sockets opened by ovs-vswitchd is decreased. As a result, the
described problem no longer occurs. (BZ#1526306)

* Previously, when OpenvSwitch service was reloaded, the default flow
was not removed and it became part of the final flow table. With this
update, the default flow rule is no longer added after a service
reload. As a result, the described problem no longer occurs.
(BZ#1626096)

Enhancement(s) :

* With this update, the pmd-rxq-assign configuration has been added to
Poll Mode Drivers (PMDs) cores. This allows users to select a
round-robin assignment. (BZ#1616001)

* With this update the ovs-appctl connection-status command has been
introduced to the ovs-appctl utility. The command enables to monitor
hypervisor (HV) south bound database (SBDB) connection status. Layered
products can now check if the ovn-controller is properly connected to
a central node. (BZ#1593804)

* With this update, a support for the Dynamic Host Configuration
Protocol (DHCP) option 252 has been added to Open Virtual Network
(OVN) Native DHCP. (BZ#1641765)

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2018:3500

https://access.redhat.com/security/cve/cve-2018-17204

https://access.redhat.com/security/cve/cve-2018-17205

https://access.redhat.com/security/cve/cve-2018-17206

Plugin Details

Severity: Medium

ID: 118745

File Name: redhat-RHSA-2018-3500.nasl

Version: 1.3

Type: local

Agent: unix

Published: 2018/11/06

Modified: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C

CVSS v3.0

Base Score: 4.9

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:openvswitch, p-cpe:/a:redhat:enterprise_linux:openvswitch-debuginfo, p-cpe:/a:redhat:enterprise_linux:openvswitch-devel, p-cpe:/a:redhat:enterprise_linux:openvswitch-ovn-central, p-cpe:/a:redhat:enterprise_linux:openvswitch-ovn-common, p-cpe:/a:redhat:enterprise_linux:openvswitch-ovn-host, p-cpe:/a:redhat:enterprise_linux:openvswitch-ovn-vtep, p-cpe:/a:redhat:enterprise_linux:openvswitch-test, p-cpe:/a:redhat:enterprise_linux:python-openvswitch, cpe:/o:redhat:enterprise_linux:7

Patch Publication Date: 2018/11/05

Reference Information

CVE: CVE-2018-17204, CVE-2018-17205, CVE-2018-17206

RHSA: 2018:3500