---
title: "CVE-2014-5277\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-2014-5277?format=md
keywords: index, follow
---

# CVE-2014-5277

Publication date 17 November 2014

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

Toggle side navigation

## Description

Docker before 1.3.1 and docker-py before 0.5.3 fall back to HTTP when the
HTTPS connection to the registry fails, which allows man-in-the-middle
attackers to conduct downgrade attacks and obtain authentication and image
data by leveraging a network position between the client and the registry
to block HTTPS traffic.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| docker.io | 17.04 zesty | Not affected |
| 16.10 yakkety | Not affected |
| 16.04 LTS xenial | Not affected |
| 15.10 wily | Not affected |
| 15.04 vivid | Not affected |
| 14.10 utopic | Ignored end of life |
| 14.04 LTS trusty | Fixed 1.6.2~dfsg1-1ubuntu4~14.04.1 |
| 12.04 LTS precise | Not in release |
| 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)

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-5277)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2014-5277)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2014-5277)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2014-5277)

### Other references

* <https://groups.google.com/d/topic/docker-user/oYm0i3xShJU/discussion>
* <https://www.cve.org/CVERecord?id=CVE-2014-5277>