================================================================ OSSA-2015-018: Neutron firewall rules bypass through port update ================================================================

:Date: September 08, 2015 :CVE: CVE-2015-5240

Affects ~~~~~~~ - Neutron: versions through 2014.2.3 and 2015.1 versions through 2015.1.1

Description ~~~~~~~~~~~ Kevin Benton from Mirantis reported a vulnerability in Neutron. By changing the device owner of an instance's port right after it is created, an authenticated user may prevent application of firewall rules and so avoid IP anti-spoofing controls. All Neutron setups using the ML2 plugin or a plugin that relies on the security groups AMQP API are affected.

Patches ~~~~~~~ - https://review.openstack.org/221345 (Juno) - https://review.openstack.org/221344 (Kilo) - https://review.openstack.org/221342 (Liberty)

Credits ~~~~~~~ - Kevin Benton from Mirantis (CVE-2015-5240)

References ~~~~~~~~~~ - https://launchpad.net/bugs/1489111 - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5240

Notes ~~~~~ - This fix will be included in future 2014.2.4 (juno) and 2015.1.2 (kilo) releases.

-- Tristan Cacqueray OpenStack Vulnerability Management Team