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Fencer Intel
high 8.2

CVE-2016-5363 json

OpenStack Neutron Intended MAC-spoofing protection mechanism bypass

published 2016-06-17 10 y ago modified 2026-07-07 4 mo ago also GHSA-9pp3-cvmq-9p22 , PYSEC-2026-852 , EUVD-2022-3425

cvss
8.2
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi neutron 7.1.0, 8.1.0
  • neutron Debian 14, Debian 13, Debian 12 2:8.1.2-1

debian advisories DEBIAN-CVE-2016-5363

  • openstack-neutron openstack 8 1:7.0.4-11.el7ost
  • python-neutron openstack 8 1:7.0.4-11.el7ost
  • python-neutron-tests openstack 8 1:7.0.4-11.el7ost
  • openstack-neutron-ml2 openstack 8 1:7.0.4-11.el7ost
  • openstack-neutron-cisco openstack 8 1:7.0.4-11.el7ost
  • openstack-neutron-nuage openstack 8 1:7.0.4-11.el7ost
  • openstack-neutron-common openstack 8 1:7.0.4-11.el7ost
  • openstack-neutron-brocade openstack 8 1:7.0.4-11.el7ost

red hat advisories RHSA-2016:1473RHSA-2016:1474

  • openstack-heat OpenStack Cloud 6 5.0.2~a0~dev93-9.1
  • openstack-nova OpenStack Cloud 6 12.0.5~a0~dev2-7.1
  • openstack-cinder OpenStack Cloud 6 7.0.3~a0~dev2-7.1
  • openstack-glance OpenStack Cloud 6 11.0.2~a0~dev13-7.1
  • openstack-manila OpenStack Cloud 6 1.0.2~a0~dev11-9.1
  • openstack-neutron OpenStack Cloud 6 7.1.2~a0~dev29-10.1
  • openstack-keystone OpenStack Cloud 6 8.1.1~a0~dev13-3.1
  • openstack-dashboard OpenStack Cloud 6 8.0.2~a0~dev34-8.1

suse advisories SUSE-SU-2016:2143-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-5363 updated cvss 6.3

openstack-neutron: MAC source address spoofing vulnerability

  • Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) openstack-neutron Red Hat Enterprise Linux OpenStack Platform 6 (Juno) openstack-neutron
    affected: no fix planned “Will not fix”
  • Red Hat OpenStack Platform 9 (Mitaka) python-neutron, openstack-neutron, python-neutron-tests, openstack-neutron-ml2, openstack-neutron-common, openstack-neutron-rpc-server, +6 more
    affected: no fix available
  • Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 python-neutron 2015.1.4-2.el7ost, openstack-neutron 2015.1.4-2.el7ost, python-neutron-tests 2015.1.4-2.el7ost, openstack-neutron-ibm 2015.1.4-2.el7ost, openstack-neutron-ml2 2015.1.4-2.el7ost, openstack-neutron-nec 2015.1.4-2.el7ost, +19 more
    fixed: vendor fix RHSA-2016:1474
  • Red Hat OpenStack Platform 8.0 (Liberty) python-neutron 7.0.4-11.el7ost, openstack-neutron 7.0.4-11.el7ost, python-neutron-tests 7.0.4-11.el7ost, openstack-neutron-ml2 7.0.4-11.el7ost, openstack-neutron-cisco 7.0.4-11.el7ost, openstack-neutron-nuage 7.0.4-11.el7ost, +16 more
    fixed: vendor fix RHSA-2016:1473
  • Red Hat OpenStack Platform 10 (Newton) python-neutron, openstack-neutron, python-neutron-tests, openstack-neutron-ml2, openstack-neutron-common, openstack-neutron-rpc-server, +5 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.27% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 8.2 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:P/I:N/A:P
GitHub 3.0 8.2 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
OSV 3.0 8.2 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi neutron
<7.1.0
>=8.0.0, <8.1.0
7.1.0
8.1.0

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.