---
title: "CVE-2013-2166\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-2013-2166?format=md
keywords: index, follow
---

# CVE-2013-2166

Publication date 10 December 2019

Last updated 25 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**9.8 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2013-2166?format=md#impact-score)

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## Description

python-keystoneclient version 0.2.3 to 0.2.5 has middleware memcache
encryption bypass

[Read the notes from the security team](https://ubuntu.com/security/CVE-2013-2166?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| python-keystoneclient | 13.04 raring | Ignored |
| 12.10 quantal | Not affected |
| 12.04 LTS precise | Not affected |
| 10.04 LTS lucid | 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-2013-2166?format=md#patch-details)

## Notes

---

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

per upstream, feature exposing this bug was introduced in Grizzly as
an optional feature
fix for CVE-2013-2167 implemented in this patchset
per upstream, patch is forward compatible, but will invalidate any
existing ephemeral encrypted or signed memcache entries. This is too
disruptive for a stable release update

### 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 |
| --- | --- |
| python-keystoneclient | * Other:   <https://review.openstack.org/33661> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.8 · Critical

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.8 · Critical |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-2166)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2013-2166)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2013-2166)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2013-2166)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2013-2166>