---
title: "CVE-2011-4076\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-2011-4076?format=md
keywords: index, follow
---

# CVE-2011-4076

Publication date 25 October 2011

Last updated 25 August 2025

---

Ubuntu priority

**High**

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

## Cvss 3 Severity Score

**5.9 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2011-4076?format=md#impact-score)

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## Description

OpenStack Nova before 2012.1 allows someone with access to an
EC2\_ACCESS\_KEY (equivalent to a username) to obtain the EC2\_SECRET\_KEY
(equivalent to a password). Exposing the EC2\_ACCESS\_KEY via http or tools
that allow man-in-the-middle over https could allow an attacker to easily
obtain the EC2\_SECRET\_KEY. An attacker could also presumably brute force
values for EC2\_ACCESS\_KEY.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| nova | 11.10 oneiric | Fixed 2011.3-0ubuntu6.2 |
| 11.04 natty | Fixed 2011.2-0ubuntu1.1 |
| 10.10 maverick | Fixed 0.9.1~bzr331-0ubuntu2.1 |
| 10.04 LTS lucid | Not in release |
| 8.04 LTS hardy | 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-2011-4076?format=md#patch-details)

### 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 |
| --- | --- |
| nova | * Upstream:   <https://review.openstack.org/gitweb?p=openstack%2Fnova.git;a=commit;h=beee11edbfdd82cd81bc9c0fd75912c167892c2b> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.9 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | High |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | None |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.9 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4076)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-4076)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-4076)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2011-4076)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2011-4076>