CVE-2018-14635 — neutron
MEDIUMCVE-2018-14635 is a medium-severity (CVSS 6.5) Improper Input Validation vulnerability in neutron. A fix is available for neutron — see the affected versions and patch details below.
OpensStack Neutron Denial of Service Vulnerability
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2018-14635 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,166 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
neutron🐍neutron🐍neutronReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
When using the Linux bridge ml2 driver, non-privileged tenants are able to create and attach ports without specifying an IP address, bypassing IP address validation. A potential denial of service could occur if an IP address, conflicting with existing guests or routers, is then assigned from outside of the allowed allocation pool. Versions of openstack-neutron before 13.0.0.0b2, 12.0.3 and 11.0.5 are vulnerable.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | neutron | ≥ 13.0.0.0b1&&< 13.0.0.0b2 | 13.0.0.0b2pip install --upgrade 'neutron==13.0.0.0b2' |
| 🐍PyPI | neutron | all versions | 11.0.6pip install --upgrade 'neutron==11.0.6' |
| 🐍PyPI | neutron | ≥ 12.0.0&&< 12.0.4 | 12.0.4pip install --upgrade 'neutron==12.0.4' |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for neutron, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update neutron to 13.0.0.0b2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-14635 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2018-14635 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2018-14635. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat OpenStack Platform 10.0 (Newton) | openstack-neutron-1:9.4.1-28.el7ost | RHSA-2018:2715 |
| Red Hat OpenStack Platform 12.0 (Pike) | openstack-neutron-1:11.0.4-6.el7ost | RHSA-2018:3792 |
| Red Hat OpenStack Platform 13.0 (Queens) | openstack-neutron-1:12.0.3-5.el7ost | RHSA-2018:2710 |
Frequently Asked Questions
Is CVE-2018-14635 in your dependencies?
O3 Security finds CVE-2018-14635 across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.