---
title: "CVE-2015-5240\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2015-5240?format=md
keywords: index, follow
---

# CVE-2015-5240

Publication date 27 October 2015

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

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## Description

Race condition in OpenStack Neutron before 2014.2.4 and 2015.1 before
2015.1.2, when using the ML2 plugin or the security groups AMQP API, allows
remote authenticated users to bypass IP anti-spoofing controls by changing
the device owner of a port to start with network: before the security group
rules are applied.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2015-5240?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| neutron | 15.10 wily | Not affected |
| 15.04 vivid | Not affected |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2015-5240?format=md#patch-details)

## Notes

---

### [sbeattie](https://launchpad.net/~sbeattie)

This fix will be included in future 2014.2.4 (juno) and
2015.1.2 (kilo) releases.

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| neutron | * Upstream:   <https://review.openstack.org/221345> * Upstream:   <https://review.openstack.org/221344> * Upstream:   <https://review.openstack.org/221342> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5240)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-5240)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-5240)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-5240)

### Other references

* <http://www.openwall.com/lists/oss-security/2015/09/08/9>
* <https://www.cve.org/CVERecord?id=CVE-2015-5240>