---
title: "CVE-2014-1487\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-2014-1487?format=md
keywords: index, follow
---

# CVE-2014-1487

Publication date 4 February 2014

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2014-1487?format=md#impact-score)

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## Description

The Web workers implementation in Mozilla Firefox before 27.0, Firefox ESR
24.x before 24.3, Thunderbird before 24.3, and SeaMonkey before 2.24 allows
remote attackers to bypass the Same Origin Policy and obtain sensitive
authentication information via vectors involving error messages.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 13.10 saucy | Fixed 27.0+build1-0ubuntu0.13.10.1 |
| 12.10 quantal | Fixed 27.0+build1-0ubuntu0.12.10.1 |
| 12.04 LTS precise | Fixed 27.0+build1-0ubuntu0.12.04.1 |
| 10.04 LTS lucid | Ignored end of life |
| thunderbird | 13.10 saucy | Fixed 1:24.3.0+build2-0ubuntu0.13.10.1 |
| 12.10 quantal | Fixed 1:24.3.0+build2-0ubuntu0.12.10.1 |
| 12.04 LTS precise | Fixed 1:24.3.0+build2-0ubuntu0.12.04.1 |
| 10.04 LTS lucid | Ignored end of life |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1487)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2014-1487)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2014-1487)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2014-1487)

### Related Ubuntu Security Notices (USN)

+ [USN-2102-1](https://usn.ubuntu.com/USN-2102-1)
+ Firefox vulnerabilities
+ 10 February 2014

+ [USN-2119-1](https://usn.ubuntu.com/USN-2119-1)
+ Thunderbird vulnerabilities
+ 19 February 2014

### Other references

* <https://rhn.redhat.com/errata/RHSA-2014-0132.html>
* <http://www.mozilla.org/security/announce/2014/mfsa2014-09.html>
* <https://www.cve.org/CVERecord?id=CVE-2014-1487>