{"id":"CVE-2016-5363","aliases":["GHSA-9pp3-cvmq-9p22","PYSEC-2026-852"],"title":"OpenStack Neutron Intended MAC-spoofing protection mechanism bypass","summary":"OpenStack Neutron Intended MAC-spoofing protection mechanism bypass","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","vendor":"neutron","product":"neutron","ecosystem":"pip","affected":["neutron < 7.1.0","neutron >= 8.0.0, < 8.1.0"],"patched":["neutron 7.1.0","neutron 8.1.0"],"published":"2022-05-17","updated":"2026-07-07","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-9pp3-cvmq-9p22","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-5363"},{"url":"https://github.com/openstack/neutron/commit/5853af9cba6733725d6c9ac0db644f426713f0cf"},{"url":"https://github.com/openstack/neutron/commit/6a93ee8ac1a901c255e3475a24f1afc11d8bf80f"},{"url":"https://github.com/openstack/neutron/commit/997d7b03fb7f5528f0a3ce70867b9dcd9321509e"},{"url":"https://github.com/openstack/neutron/commit/fd5fd259a02156babdfcb12f66cde6ec9e7274ae"},{"url":"https://access.redhat.com/errata/RHSA-2016:1473"},{"url":"https://access.redhat.com/errata/RHSA-2016:1474"},{"url":"https://bugs.launchpad.net/neutron/+bug/1558658"},{"url":"https://github.com/openstack/neutron"},{"url":"https://review.openstack.org/#/c/299021"},{"url":"https://review.openstack.org/#/c/299023"},{"url":"https://review.openstack.org/#/c/299025"},{"url":"https://security.openstack.org/ossa/OSSA-2016-009.html"},{"url":"http://www.openwall.com/lists/oss-security/2016/06/10/5"},{"url":"http://www.openwall.com/lists/oss-security/2016/06/10/6"}],"tags":["osv","pip"],"epss":0.03486,"epssPercentile":0.88605,"ingestedAt":"2026-07-08T18:25:48.061Z","slug":"CVE-2016-5363","body":"## Overview\n\nThe 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.\n\n## Affected packages\n\n- `neutron < 7.1.0`\n- `neutron >= 8.0.0, < 8.1.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `neutron 7.1.0`\n- `neutron 8.1.0`","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":45.1,"likelihood":0.7,"exploitation":0,"ransomware":0},"changes":[]}