CVE-2015-3221 OpenStack Neutron Improper Input Validation vulnerability

Medium 4.0 Published Updated

Authenticated users can crash the L2 agent by adding invalid address pairs when using the IPTables firewall driver.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is CVE-2015-3221?

CVE-2015-3221 is a medium-severity denial of service vulnerability in n/a, published on 26 Aug 2015. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

OpenStack Neutron before 2014.2.4 (juno) and 2015.1.x before 2015.1.1 (kilo), when using the IPTables firewall driver, allows remote authenticated users to cause a denial of service (L2 agent crash) by adding an address pair that is rejected by the ipset tool.

Weakness: CWE-20

Which versions are affected by CVE-2015-3221?

5 open source packages ship an affected version, including neutron. It affects 1 product.

PackageAffectedFixed in
neutron PyPIAll versions2014.2.4, 2015.1.1
neutron PyPIFrom 20002014.2.4
neutron PyPIFrom 20002014.2.4
neutron PyPIFrom 2015.1.02015.1.1
neutron PyPIFrom 2015.1.02015.1.1
Linux distribution packages (26)
openstack-neutron Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-bigswitch Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-brocade Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-cisco Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-common Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-embrane Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-hyperv Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-ibm Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-linuxbridge Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-mellanox Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-metaplugin Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-metering-agent Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-midonet Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-ml2 Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-nec Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-nuage Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-ofagent Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-oneconvergence-nvsd Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-opencontrail Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-openvswitch Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-plumgrid Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-ryu Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-sriov-nic-agent Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-vmware Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
openstack-neutron-vpn-agent Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost
python-neutron Red Hat:openstack:6::el7All versions0:2014.2.3-9.el7ost

Products include Openstack Neutron.

How do I fix CVE-2015-3221?

Upgrade neutron to a fixed version for your release line: 2014.2.4 or 2015.1.1.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2015-3221 being exploited?

There is no known exploitation of CVE-2015-3221 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

Sources

Also known as DEBIAN-CVE-2015-3221, GHSA-wf44-4mgj-rwvx, PYSEC-2026-856, RHSA-2015:1680.

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