Race Condition Affecting openstack-neutron-ml2 package, versions <0:2015.1.4-16.1.el7ost
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL7-OPENSTACKNEUTRONML2-5109392
- published27 Mar 2023
- disclosed8 Aug 2017
Introduced: 8 Aug 2017
CVE-2017-7543 (opens in a new tab)How to fix?
Upgrade RHEL:7 openstack-neutron-ml2 to version 0:2015.1.4-16.1.el7ost or higher.
This issue was patched in RHSA-2017:2450.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openstack-neutron-ml2 package and not the openstack-neutron-ml2 package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
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.