# CVE-2019-10876: OpenStack Neutron overlapping security group rules prevents compute node network configuration

Source: https://junglewise.ai/threats/cve-2019-10876-openstack-neutron-overlapping-security-group-rules-prevents  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2019-04-05  
License: CC BY 4.0 with a link back

CVE-2019-10876 · Severity: low · CVSS 3 · Published 2019-04-05

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.

Technologies: [neutron (PyPI)](https://junglewise.ai/threats/technologies/pypi-neutron). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2019-10876 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-10876 being exploited in the wild.

**How severe is CVE-2019-10876?** Low severity, with a CVSS score of 3, published 5 April 2019.

**Which products and versions are affected?** neutron (PyPI) ECOSYSTEM:introduced=11.0.0,fixed=11.0.7, ECOSYSTEM:introduced=12.0.0,fixed=12.0.6,introduced=0,fixed=11.0.7,introduced=13.0.0,fixed=13.0.3.

**Is there a fix for CVE-2019-10876?** Yes. neutron (PyPI): upgrade to 11.0.7, 13.0.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2019-10876?** Check whether you run neutron (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- neutron (PyPI): upgrade to 11.0.7, 13.0.3 or later

  ```sh
  pip install "neutron>=13.0.3"
  ```


## Affected products

- neutron (PyPI) ECOSYSTEM:introduced=11.0.0,fixed=11.0.7, ECOSYSTEM:introduced=12.0.0,fixed=12.0.6,introduced=0,fixed=11.0.7,introduced=13.0.0,fixed=13.0.3

## Identifiers

- CVE-2019-10876
- GHSA-jr9m-v5qh-mh2j
- PYSEC-2019-189

## Related threats

- [PYSEC-2026-1693 - OpenStack Neutron can use an incorrect ID during policy enforcement](https://junglewise.ai/threats/cve-2024-53916-openstack-neutron-can-use-an-incorrect-id-during-policy)
- [PYSEC-2026-1694 - Denial of service in neutron](https://junglewise.ai/threats/cve-2023-3637-denial-of-service-in-neutron)
- [PYSEC-2026-855 - openstack-neutron uncontrolled resource consumption flaw](https://junglewise.ai/threats/cve-2022-3277-openstack-neutron-uncontrolled-resource-consumption-flaw)
- [PYSEC-2026-851 - OpenStack Neutron Improper Authentication vulnerability](https://junglewise.ai/threats/cve-2014-0056-openstack-neutron-improper-authentication-vulnerability)
- [PYSEC-2026-853 - OpenStack Neutron Race condition vulnerability](https://junglewise.ai/threats/cve-2015-5240-openstack-neutron-race-condition-vulnerability)