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[OSSA-2019-002] Unable to install new flows on compute nodes when having broken security group rules (CVE-2019-10876)


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===========================================================================================
OSSA-2019-002: Overlapping security group rules prevents compute node
network configuration
===========================================================================================

:Date: April 08, 2019
:CVE: CVE-2019-10876


Affects
~~~~~~~
- - Neutron: >=11.0.0 <11.0.7, >=12.0.0 <12.0.6, >=13.0.0 <13.0.3


Description
~~~~~~~~~~~
Diko Parvanov (Canonical) reported a vulnerability in neutron-
openvswitch-agent security group rules. By creating two security
groups with separate/overlapping port ranges, an authenticated user
may prevent neutron from being able to configure networks on any
compute nodes where those security groups are present. All neutron
deployments utilizing neutron-openvswitch-agent are affected.


Patches
~~~~~~~
- - https://review.openstack.org/648102 (Pike)
- - https://review.openstack.org/648004 (Queens)
- - https://review.openstack.org/648003 (Rocky)
- - https://review.openstack.org/648002 (Stein)
- - https://review.openstack.org/640252 (Train)


Credits
~~~~~~~
- - Diko Parvanov from Canonical (CVE-2019-10876)


References
~~~~~~~~~~
- - https://launchpad.net/bugs/1813007
- - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10876
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