Description
A race-condition flaw was discovered in openstack-neutron before 7.2.0-12.1, 8.x before 8.3.0-11.1, 9.x before 9.3.1-2.1, and 10.x before 10.0.2-1.1, where, following a minor overcloud update, neutron security groups were disabled. Specifically, the following were reset to 0: net.bridge.bridge-nf-call-ip6tables and net.bridge.bridge-nf-call-iptables. The race was only triggered by an update, at which point an attacker could access exposed tenant VMs and network resources.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | openstack-neutron | openstack-neutron-10.0.2-1.1, openstack-neutron-8.3.0-11.1, openstack-neutron-9.3.1-2.1, openstack-neutron-7.2.0-12.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 11 | python-neutron +10 | 1:10.0.2-1.1.el7ost | RHSA-2017:2449 |
| Red Hat OpenStack 10 | python-neutron +10 | 1:9.3.1-2.1.el7ost | RHSA-2017:2448 |
| Red Hat OpenStack 9 | python-neutron +11 | 1:8.3.0-11.1.el7ost | RHSA-2017:2447 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 8 | python-neutron +20 | 1:7.2.0-12.1.el7ost | RHSA-2017:2451 |
| Red Hat OpenStack 7 | python-neutron +24 | 2015.1.4-16.1.el7ost | RHSA-2017:2450 |
| Red Hat OpenStack 6 | python-neutron +25 | 2014.2.3-42.el7ost | RHSA-2017:2452 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | neutron | < 7.2.0-12.1 | 7.2.0-12.1 | GHSA-hvxr-2fvv-c3wq |
| PyPI | neutron | >= 8.0.0, < 8.3.0-11.1 | 8.3.0-11.1 | GHSA-hvxr-2fvv-c3wq |
| PyPI | neutron | >= 9.0.0, < 9.3.1-2.1 | 9.3.1-2.1 | GHSA-hvxr-2fvv-c3wq |
| PyPI | neutron | >= 10.0.0, < 10.0.2-1.1 | 10.0.2-1.1 | GHSA-hvxr-2fvv-c3wq |
| PyPI | neutron | < 7.2.0-12.1 · >= 8.0.0, < 8.3.0-11.1 · >= 9.0.0, < 9.3.1-2.1 · >= 10.0.0, < 10.0.2-1.1 | 7.2.0-12.1, 8.3.0-11.1, 9.3.1-2.1, 10.0.2-1.1 | PYSEC-2026-686 |
Advisories 6
- RHSA-2017:2452 Red Hat Security Advisory: openstack-neutron security update Red Hat Security Advisories (RHSA) · Aug 1, 2026
- RHSA-2017:2450 Red Hat Security Advisory: openstack-neutron security update Red Hat Security Advisories (RHSA) · Aug 1, 2026
- RHSA-2017:2451 Red Hat Security Advisory: openstack-neutron security update Red Hat Security Advisories (RHSA) · Aug 1, 2026
- RHSA-2017:2448 Red Hat Security Advisory: openstack-neutron security update Red Hat Security Advisories (RHSA) · Aug 1, 2026
- RHSA-2017:2449 Red Hat Security Advisory: openstack-neutron security update Red Hat Security Advisories (RHSA) · Aug 1, 2026
- RHSA-2017:2447 Red Hat Security Advisory: openstack-neutron security update Red Hat Security Advisories (RHSA) · Aug 1, 2026
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7543
- RHSA-2017:2447 vendor-advisory
- RHSA-2017:2451 vendor-advisory
- RHSA-2017:2450 vendor-advisory
- RHSA-2017:2448 vendor-advisory
- 100237 vdb-entry
- RHSA-2017:2452 vendor-advisory
- RHSA-2017:2449 vendor-advisory