RHSA-2017:2447 - Security Advisory

Topic

An update for openstack-neutron 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 Important. 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

OpenStack Networking (neutron) is a pluggable, scalable, and API-driven system that provisions networking services to virtual machines. Its main function is to manage connectivity to and from virtual machines.

Security Fix(es):

• A race-condition flaw was discovered in openstack-neutron where, following a minor overcloud update, neutron security groups were disabled. Specifically, the following were reset to 0: net.bridge.bridge-nf-call-arptables, net.bridge.bridge-nf-call-ip6tables, and net.bridge.bridge-nf-call-iptables. The race was only triggered by an update, at which point an attacker could access exposed tenant VMs and network resources. (CVE-2017-7543)

This issue was discovered by Paul Needle (Red Hat).

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 9 x86_64

Fixes

• BZ - 1473792 - CVE-2017-7543 openstack-neutron: iptables not active after update

CVEs

• CVE-2017-7543

References

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