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CVE-2016-5363

OpenStack Neutron Intended MAC-spoofing protection mechanism bypass

8.2 HighFix available

CVE-2016-5363 is a high vulnerability (CVSS 8.2) in Openstack Neutron, published June 17, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.27%, the 88th percentile. Fixed in neutron 7.1.0.

The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 through 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
High

Exploit likelihood

3.27%Up 1.3 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 8.2

The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 through 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Record
CVE-2016-5363
CVSS 3.0
8.2 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CVSS 2.0
6.4 MediumAV:N/AC:L/Au:N/C:P/I:N/A:P
Weakness
CWE-254
Updated
2026-11-02
CVE List No score

The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 through 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Record
CVE-2016-5363
Updated
2026-11-02
EUVDEUVD-2022-3425 No score

The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 through 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Record
EUVD-2022-3425
Updated
2026-11-03
GitHub AdvisoriesGHSA-9pp3-cvmq-9p22 8.2

OpenStack Neutron Intended MAC-spoofing protection mechanism bypass

The IPTables firewall in OpenStack Neutron up to 7.0.4 and 8.x before 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Record
GHSA-9pp3-cvmq-9p22
CVSS 3.0
8.2 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSV 8.2

The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 through 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Record
CVE-2016-5363
CVSS 3.0
8.2 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2016-5363 8.2

The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 through 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Record
DEBIAN-CVE-2016-5363
CVSS 3.0
8.2 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-02
Show 6 moreShow less
OSVGHSA-9pp3-cvmq-9p22 8.2

OpenStack Neutron Intended MAC-spoofing protection mechanism bypass

The IPTables firewall in OpenStack Neutron up to 7.0.4 and 8.x before 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Record
GHSA-9pp3-cvmq-9p22
CVSS 3.0
8.2 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVPYSEC-2026-852 8.2

OpenStack Neutron Intended MAC-spoofing protection mechanism bypass

The IPTables firewall in OpenStack Neutron up to 7.0.4 and 8.x before 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Record
PYSEC-2026-852
CVSS 3.0
8.2 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVRHSA-2016:1473 6.3

Red Hat Security Advisory: openstack-neutron security and bug fix update

Record
RHSA-2016:1473
CVSS 3.0
6.3 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-02
OSVRHSA-2016:1474 6.3

Red Hat Security Advisory: openstack-neutron security, bug fix, and enhancement update

Record
RHSA-2016:1474
CVSS 3.0
6.3 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-02
OSVUBUNTU-CVE-2016-5363 8.2

The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 through 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Record
UBUNTU-CVE-2016-5363
CVSS 3.0
8.2 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVSUSE-SU-2016:2143-1 No score

Security update for several openstack-components

This update provides the latest code from OpenStack Liberty for openstack-ceilometer, -cinder, -dashboard, -glance, -heat, -keystone, -manila, -neutron, -neutron-fwaas, -neutron-lbaas,-nova, -resource-agents, python-networking-cisco and python-openstackclient.

Additionally some security-issues have been fixed:

openstack-nova:

  • Always copy or recreate disk.info during a migration. (bsc#970258, CVE-2016-2140)

openstack-dashboard:

  • Escape anularjs templating in unsafe HTML. (bsc#983807, CVE-2016-4428)

openstack-neutron:

  • Fix bypassing of anti-spoof protection. (bsc#984443, CVE-2016-5363, bsc#984442, CVE-2016-5362)

For a detailed description of all fixes and improvements, please refer to the changelog.

Record
SUSE-SU-2016:2143-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
neutron
PyPI
 through 7.0.4
7.1.0
neutron
PyPI
 8.0.0 up to 8.1.0
8.1.0
neutron
Debian:12
 before 2:8.1.2-1
2:8.1.2-1
neutron
Debian:13
 before 2:8.1.2-1
2:8.1.2-1
neutron
Debian:14
 before 2:8.1.2-1
2:8.1.2-1
neutron
PyPI
 before 7.1.0, plus listed versions
0.0
7.1.0
neutron
PyPI
 before 7.1.0, 8.0.0 up to 8.1.0, plus listed versions
0.0
7.1.08.1.0
openstack-neutron
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-bigswitch
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-brocade
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
Show 68 moreShow less
Affected packages
PackageAffectedFixed
openstack-neutron-cisco
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-common
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-dev-server
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-embrane
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-linuxbridge
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-mellanox
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-metering-agent
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-midonet
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-ml2
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-nuage
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-ofagent
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-oneconvergence-nvsd
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-opencontrail
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-openvswitch
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-ovsvapp
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-rpc-server
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron-sriov-nic-agent
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
python-neutron
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
python-neutron-tests
Red Hat:openstack:8::el7
 before 1:7.0.4-11.el7ost
1:7.0.4-11.el7ost
openstack-neutron
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-bigswitch
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-brocade
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-cisco
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-common
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-embrane
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-ibm
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-linuxbridge
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-mellanox
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-metaplugin
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-metering-agent
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-midonet
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-ml2
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-nec
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-nuage
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-ofagent
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-oneconvergence-nvsd
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-opencontrail
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-openvswitch
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-ovsvapp
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-plumgrid
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-sriov-nic-agent
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-neutron-vmware
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
python-neutron
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
python-neutron-tests
Red Hat:openstack:7::el7
 before 0:2015.1.4-2.el7ost
0:2015.1.4-2.el7ost
openstack-ceilometer
SUSE:OpenStack Cloud 6
 before 5.0.4~a0~dev6-6.1
5.0.4~a0~dev6-6.1
openstack-ceilometer-doc
SUSE:OpenStack Cloud 6
 before 5.0.4~a0~dev6-6.2
5.0.4~a0~dev6-6.2
openstack-cinder
SUSE:OpenStack Cloud 6
 before 7.0.3~a0~dev2-7.1
7.0.3~a0~dev2-7.1
openstack-cinder-doc
SUSE:OpenStack Cloud 6
 before 7.0.3~a0~dev2-7.1
7.0.3~a0~dev2-7.1
openstack-dashboard
SUSE:OpenStack Cloud 6
 before 8.0.2~a0~dev34-8.1
8.0.2~a0~dev34-8.1
openstack-glance
SUSE:OpenStack Cloud 6
 before 11.0.2~a0~dev13-7.1
11.0.2~a0~dev13-7.1
openstack-glance-doc
SUSE:OpenStack Cloud 6
 before 11.0.2~a0~dev13-7.1
11.0.2~a0~dev13-7.1
openstack-heat
SUSE:OpenStack Cloud 6
 before 5.0.2~a0~dev93-9.1
5.0.2~a0~dev93-9.1
openstack-heat-doc
SUSE:OpenStack Cloud 6
 before 5.0.2~a0~dev93-9.3
5.0.2~a0~dev93-9.3
openstack-keystone
SUSE:OpenStack Cloud 6
 before 8.1.1~a0~dev13-3.1
8.1.1~a0~dev13-3.1
openstack-keystone-doc
SUSE:OpenStack Cloud 6
 before 8.1.1~a0~dev13-3.2
8.1.1~a0~dev13-3.2
openstack-manila
SUSE:OpenStack Cloud 6
 before 1.0.2~a0~dev11-9.1
1.0.2~a0~dev11-9.1
openstack-manila-doc
SUSE:OpenStack Cloud 6
 before 1.0.2~a0~dev11-9.2
1.0.2~a0~dev11-9.2
openstack-neutron
SUSE:OpenStack Cloud 6
 before 7.1.2~a0~dev29-10.1
7.1.2~a0~dev29-10.1
openstack-neutron-doc
SUSE:OpenStack Cloud 6
 before 7.1.2~a0~dev29-10.1
7.1.2~a0~dev29-10.1
openstack-neutron-fwaas
SUSE:OpenStack Cloud 6
 before 7.1.2~a0~dev1-6.1
7.1.2~a0~dev1-6.1
openstack-neutron-fwaas-doc
SUSE:OpenStack Cloud 6
 before 7.1.2~a0~dev1-6.1
7.1.2~a0~dev1-6.1
openstack-neutron-lbaas
SUSE:OpenStack Cloud 6
 before 7.1.2~a0~dev1-6.1
7.1.2~a0~dev1-6.1
openstack-neutron-lbaas-doc
SUSE:OpenStack Cloud 6
 before 7.1.2~a0~dev1-6.1
7.1.2~a0~dev1-6.1
openstack-nova
SUSE:OpenStack Cloud 6
 before 12.0.5~a0~dev2-7.1
12.0.5~a0~dev2-7.1
openstack-nova-doc
SUSE:OpenStack Cloud 6
 before 12.0.5~a0~dev2-7.1
12.0.5~a0~dev2-7.1
openstack-resource-agents
SUSE:OpenStack Cloud 6
 before 1.0+git.1467079370.4f2c49d-7.1
1.0+git.1467079370.4f2c49d-7.1
python-networking-cisco
SUSE:OpenStack Cloud 6
 before 2.1.1-6.1
2.1.1-6.1
python-openstackclient
SUSE:OpenStack Cloud 6
 before 1.7.2-4.1
1.7.2-4.1

History

History
WhenChangedSources
2026-11-03affected
2026-11-03aliasesEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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