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CVE-2017-7543

A race-condition flaw was discovered in openstack-neutron before 7.2.0-12.1, 8.x before 8.3.0-11.1, 9.x before 9.3.1-2.1, and 10.x before 10.0.2-1.1, where, fo…

Impact

A race-condition flaw was discovered in openstack-neutron before 7.2.0-12.1, 8.x before 8.3.0-11.1, 9.x before 9.3.1-2.1, and 10.x before 10.0.2-1.1, where, following a minor overcloud update, neutron security groups were disabled. Specifically, the following were reset to 0: 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.

Affected products

VendorProductAffected versions
OpenstackNeutron
from 7.0.0 before 7.2.0-12.1
from 8.0.0 before 8.3.0-11.1
from 9.0.0 before 9.3.1-2.1
from 10.0.0 before 10.0.2-1.1
RedhatOpenstack
Versions 6.0, 7.0, 8, 9, 10, 11

Weakness classification

CWE-362

References