RHSA-2019:0081 - Security Advisory

Topic

An update for openvswitch is now available for Red Hat OpenStack Platform 13.0 (Queens).

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.

Description

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, the first packet of a new connection using an OVN logical router was used to discover the MAC address of the destination. This resulted in the loss of the first packet on the new connection. This

enhancement adds the capability to correctly queue the first packet of a new connection, which prevents the loss of that packet. (BZ#1600115)

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

Affected Products

• Red Hat OpenStack 13 x86_64
• Red Hat OpenStack for IBM Power 13 ppc64le

Fixes

• BZ - 1600115 - ping loss of first packet with OVN l3 logical router.
• BZ - 1632522 - CVE-2018-17204 openvswitch: Mishandle of group mods in lib/ofp-util.c:parse_group_prop_ntr_selection_method() allows for assertion failure
• BZ - 1632525 - CVE-2018-17205 openvswitch: Error during bundle commit in ofproto/ofproto.c:ofproto_rule_insert__() allows for crash
• BZ - 1632528 - CVE-2018-17206 openvswitch: Buffer over-read in lib/ofp-actions.c:decode_bundle()
• BZ - 1651453 - openvswitch package release request including the fix of RHBZ#1526306 for RHOSP13

CVEs

• CVE-2018-17204
• CVE-2018-17205
• CVE-2018-17206

References

• https://access.redhat.com/security/updates/classification/#moderate