---
title: "CVE-2015-0832\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-2015-0832?format=md
keywords: index, follow
---

# CVE-2015-0832

Publication date 25 February 2015

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

Mozilla Firefox before 36.0 does not properly recognize the equivalence of
domain names with and without a trailing . (dot) character, which allows
man-in-the-middle attackers to bypass the HPKP and HSTS protection
mechanisms by constructing a URL with this character and leveraging access
to an X.509 certificate for a domain with this character.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 14.10 utopic | Fixed 36.0+build2-0ubuntu0.14.10.4 |
| 14.04 LTS trusty | Fixed 36.0+build2-0ubuntu0.14.04.4 |
| 12.04 LTS precise | Fixed 36.0+build2-0ubuntu0.12.04.5 |
| 10.04 LTS lucid | Ignored end of life |

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* [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-2015-0832)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-0832)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-0832)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-0832)

### Related Ubuntu Security Notices (USN)

+ [USN-2505-1](https://usn.ubuntu.com/USN-2505-1)
+ Firefox vulnerabilities
+ 25 February 2015

### Other references

* <https://www.mozilla.org/en-US/security/advisories/mfsa2015-13/>
* <https://bugzilla.mozilla.org/show_bug.cgi?id=1065909>
* <http://www.mozilla.org/security/announce/2015/mfsa2015-13.html>
* <https://www.cve.org/CVERecord?id=CVE-2015-0832>