Race condition in OpenStack Neutron before 2014.2.4 and 2015.1 before 2015.1.2, when using the ML2 plugin or the security groups AMQP API, allows remote authenticated users to bypass IP anti-spoofing controls by changing the device owner of a port to start with network: before the security group rules are applied.
Exploitability
AV:NAC:MAu:SImpact
C:NI:PA:N3.5/AV:N/AC:M/Au:S/C:N/I:P/A:N