CVEvulnerability

CVE-2017-7543

5.9 MEDIUM Published 2018-07-26 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-07-26
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
5.3 MEDIUM — CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS 3.0 ([email protected])
5.9 MEDIUM — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0 ([email protected])
4.3 MEDIUM — AV:N/AC:M/Au:N/C:P/I:N/A:N
Weaknesses
CWE-362

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 configurations

• openstack neutron (>= 7.0.0 < 7.2.0-12.1) • openstack neutron (>= 8.0.0 < 8.3.0-11.1) • openstack neutron (>= 9.0.0 < 9.3.1-2.1) • openstack neutron (>= 10.0.0 < 10.0.2-1.1) • redhat openstack 6.0 • redhat openstack 7.0 • redhat openstack 8 • redhat openstack 9 • redhat openstack 10 • redhat openstack 11

Related

Weakness · CWE (1)

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

References