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Fencer Vulns
medium 6.5

CVE-2019-9735 json

OpenStack Neutron's unsupported dport option prevents applying security groups

published 2019-03-13 7 y ago modified 2026-06-17 4 mo ago also GHSA-9773-3fqg-8w25 , PYSEC-2019-190 , EUVD-2019-0090

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

An issue was discovered in the iptables firewall module in OpenStack Neutron before 10.0.8, 11.x before 11.0.7, 12.x before 12.0.6, and 13.x before 13.0.3. By setting a destination port in a security group rule along with a protocol that doesn't support that option (for example, VRRP), an authenticated user may block further application of security group rules for instances from any project/tenant on the compute hosts to which it's applied. (Only deployments using the iptables security group driver are affected.)

Patch / fix

  • pypi neutron 10.0.8, 11.0.7, 12.0.6, 13.0.3
  • openstack neutron 10.0.8, 11.0.7, 12.0.6, 13.0.3
  • neutron Debian 14, Debian 13, Debian 12 2:13.0.2-13

debian advisories DEBIAN-CVE-2019-9735

  • neutron Ubuntu 16.04 LTS 2:8.4.0-0ubuntu7.4
  • neutron Ubuntu 18.04 LTS 2:12.0.6-0ubuntu1

ubuntu advisories UBUNTU-CVE-2019-9735

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openstack-neutron openstack 14 1:13.0.3-0.20190313155649.00b63be.el7ost
  • python-neutron openstack 14 1:13.0.3-0.20190313155649.00b63be.el7ost
  • openstack-neutron-ml2 openstack 14 1:13.0.3-0.20190313155649.00b63be.el7ost
  • openstack-neutron-common openstack 14 1:13.0.3-0.20190313155649.00b63be.el7ost
  • openstack-neutron-rpc-server openstack 14 1:13.0.3-0.20190313155649.00b63be.el7ost
  • openstack-neutron-linuxbridge openstack 14 1:13.0.3-0.20190313155649.00b63be.el7ost
  • openstack-neutron-openvswitch openstack 14 1:13.0.3-0.20190313155649.00b63be.el7ost
  • openstack-neutron-macvtap-agent openstack 14 1:13.0.3-0.20190313155649.00b63be.el7ost

red hat advisories RHSA-2019:0879RHSA-2019:0916RHSA-2019:0935

  • ardana-db OpenStack Cloud 9 9.0+git.1564409964.b7e4fc3-3.7.2
  • ardana-mq OpenStack Cloud 9 9.0+git.1565115025.148d092-3.7.2
  • ardana-ses OpenStack Cloud 9 9.0+git.1565962617.523149b-3.7.2
  • crowbar-ha OpenStack Cloud Crowbar 9 6.0+git.1566406179.7549de2-3.7.2
  • crowbar-ui OpenStack Cloud Crowbar 9 1.3.0+git.1563181545.65360af5-8.1
  • ardana-heat OpenStack Cloud 9 9.0+git.1565721273.f44b8d7-3.7.2
  • ardana-nova OpenStack Cloud 9 9.0+git.1566332515.e232568-3.7.2
  • ardana-swift OpenStack Cloud 9 9.0+git.1565891872.73fc3c7-3.7.2

suse advisories SUSE-SU-2019:2267-1SUSE-SU-2019:2219-1

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-2019-9735 updated cvss 7.1

openstack-neutron: incorrect validation of port settings in iptables security group driver

  • Red Hat OpenStack Platform 10.0 python-neutron 9.4.1-40.el7ost, openstack-neutron 9.4.1-40.el7ost, python-neutron-lbaas 9.2.2-8.el7ost, python-neutron-tests 9.4.1-40.el7ost, openstack-neutron-ml2 9.4.1-40.el7ost, openstack-neutron-lbaas 9.2.2-8.el7ost, +11 more
    fixed: vendor fix RHSA-2019:0916
  • Red Hat OpenStack Platform 13.0 python-neutron 12.0.5-11.el7ost, openstack-neutron 12.0.5-11.el7ost, openstack-neutron-ml2 12.0.5-11.el7ost, openstack-neutron-common 12.0.5-11.el7ost, openstack-neutron-rpc-server 12.0.5-11.el7ost, openstack-neutron-linuxbridge 12.0.5-11.el7ost, +4 more
    fixed: vendor fix RHSA-2019:0935
  • Red Hat OpenStack Platform 14.0 python-neutron 13.0.3-0.20190313155649.00b63be.el7ost, openstack-neutron 13.0.3-0.20190313155649.00b63be.el7ost, openstack-neutron-ml2 13.0.3-0.20190313155649.00b63be.el7ost, openstack-neutron-common 13.0.3-0.20190313155649.00b63be.el7ost, openstack-neutron-rpc-server 13.0.3-0.20190313155649.00b63be.el7ost, openstack-neutron-linuxbridge 13.0.3-0.20190313155649.00b63be.el7ost, +4 more
    fixed: vendor fix RHSA-2019:0879
  • Red Hat OpenStack Platform 8 (Liberty) python-neutron, openstack-neutron, python-neutron-tests, openstack-neutron-ml2, openstack-neutron-cisco, openstack-neutron-nuage, +16 more 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 Red Hat OpenStack Platform 15 (Stein) python3-neutron, openstack-neutron, openstack-neutron-ml2, openstack-neutron-common, openstack-neutron-rpc-server, openstack-neutron-bgp-dragent, +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

3.71% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • launchpad.net https://launchpad.net/bugs/1818385 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P
GitHub 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi neutron
<10.0.8
>=11.0.0, <11.0.7
>=12.0.0, <12.0.6
>=13.0.0, <13.0.3
10.0.8
11.0.7
12.0.6
13.0.3

Classification

Weakness
  • CWE-755 Improper Handling of Exceptional Conditions

References

Sources

Fencer Vulns 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.