CVE-2017-7543
5.3 · MEDIUMOverview
CVE-2017-7543 is a medium-severity vulnerability affecting openstack neutron. It was published on July 26, 2018 and has a CVSS 3.0 base score of 5.3 (MEDIUM).
This vulnerability has a CVSS 3.0 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from openstack. Update neutron to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| openstack | neutron | >= 7.0.0, < 7.2.0-12.1 | Affected |
References
Frequently Asked Questions
What is CVE-2017-7543?
CVE-2017-7543 is a medium-severity vulnerability affecting openstack neutron. It was published on July 26, 2018 and has a CVSS 3.0 base score of 5.3 (MEDIUM).
How severe is CVE-2017-7543?
This vulnerability has a CVSS 3.0 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2017-7543?
Check the references section for vendor advisories and patches from openstack. Update neutron to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2017-7543?
CyberStrike's AI-powered security agents can automatically detect CVE-2017-7543 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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