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.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Neutron | Openstack | 2014.2.3 (including) | 2014.2.3 (including) |
| Neutron | Openstack | 2015.1.0 (including) | 2015.1.0 (including) |
| Neutron | Openstack | 2015.1.1 (including) | 2015.1.1 (including) |
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6 | RedHat | openstack-neutron-0:2014.1.5-4.el6ost | * |
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7 | RedHat | openstack-neutron-0:2014.1.5-4.el7ost | * |
| Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 | RedHat | openstack-neutron-0:2014.2.3-19.el7ost | * |
| Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 | RedHat | openstack-neutron-0:2015.1.1-7.el7ost | * |
A race condition occurs within concurrent environments, and it is effectively a property of a code sequence. Depending on the context, a code sequence may be in the form of a function call, a small number of instructions, a series of program invocations, etc. A race condition violates these properties, which are closely related:
A race condition exists when an “interfering code sequence” can still access the shared resource, violating exclusivity. The interfering code sequence could be “trusted” or “untrusted.” A trusted interfering code sequence occurs within the product; it cannot be modified by the attacker, and it can only be invoked indirectly. An untrusted interfering code sequence can be authored directly by the attacker, and typically it is external to the vulnerable product.