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Fencer Intel
low 3.5

CVE-2015-5240 json

OpenStack Neutron Race condition vulnerability

published 2015-10-27 11 y ago modified 2026-07-07 4 mo ago also GHSA-hhpj-6pj7-wpx5 , PYSEC-2026-853 , EUVD-2022-4160

cvss
3.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
0
none known

Summary

Race condition in OpenStack Neutron before 2014.2.4 and 2015.1 before 2015.1.2, when using the ML2 plugin or the security groups AMQP API, allows remote authenticated users to bypass IP anti-spoofing controls by changing the device owner of a port to start with network: before the security group rules are applied.

Patch / fix

  • pypi neutron 7.0.0
  • neutron Debian 14, Debian 13, Debian 12 1:7.0.0-1

debian advisories DEBIAN-CVE-2015-5240

  • openstack-neutron openstack 5 2014.1.5-4.el6ost
  • openstack-neutron openstack 5 2014.1.5-4.el7ost
  • openstack-neutron openstack 6 2014.2.3-19.el7ost
  • openstack-neutron openstack 7 2015.1.1-7.el7ost
  • python-neutron openstack 5 2014.1.5-4.el6ost
  • python-neutron openstack 5 2014.1.5-4.el7ost
  • python-neutron openstack 6 2014.2.3-19.el7ost
  • python-neutron openstack 7 2015.1.1-7.el7ost

red hat advisories RHSA-2015:1909

  • openstack-nova Cloud Compute Node for SUSE Linux Enterprise 12 5 2014.2.4~a0~dev80-14.1
  • openstack-neutron Cloud Compute Node for SUSE Linux Enterprise 12 5 2014.2.4~a0~dev103-10.3
  • python-python-memcached Cloud Compute Node for SUSE Linux Enterprise 12 5 1.54-2.1
  • openstack-neutron OpenStack Cloud 5 2014.2.4~a0~dev103-16.2
  • crowbar-barclamp-neutron OpenStack Cloud 5 1.9+git.1443859419.95e948a-12.2

suse advisories SUSE-SU-2015:2220-1SUSE-SU-2015:1890-1

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-2015-5240 updated cvss 4.9

openstack-neutron: Firewall rules bypass through port update

  • Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6 python-neutron 2014.1.5-4.el6ost, openstack-neutron 2014.1.5-4.el6ost, openstack-neutron-ibm 2014.1.5-4.el6ost, openstack-neutron-ml2 2014.1.5-4.el6ost, openstack-neutron-nec 2014.1.5-4.el6ost, openstack-neutron-ryu 2014.1.5-4.el6ost, +17 more Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7 python-neutron 2014.1.5-4.el7ost, openstack-neutron 2014.1.5-4.el7ost, openstack-neutron-ibm 2014.1.5-4.el7ost, openstack-neutron-ml2 2014.1.5-4.el7ost, openstack-neutron-nec 2014.1.5-4.el7ost, openstack-neutron-ryu 2014.1.5-4.el7ost, +17 more Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 python-neutron 2014.2.3-19.el7ost, openstack-neutron 2014.2.3-19.el7ost, openstack-neutron-ibm 2014.2.3-19.el7ost, openstack-neutron-ml2 2014.2.3-19.el7ost, openstack-neutron-nec 2014.2.3-19.el7ost, openstack-neutron-ryu 2014.2.3-19.el7ost, +20 more Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 python-neutron 2015.1.1-7.el7ost, openstack-neutron 2015.1.1-7.el7ost, python-neutron-tests 2015.1.1-7.el7ost, openstack-neutron-ibm 2015.1.1-7.el7ost, openstack-neutron-ml2 2015.1.1-7.el7ost, openstack-neutron-nec 2015.1.1-7.el7ost, +19 more
    fixed: vendor fix RHSA-2015:1909

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

0.98% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected packages

ecosystem package affected fixed in
pypi neutron
<7.0.0
7.0.0

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

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.