---
title: "CVE-2012-1940\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-2012-1940?format=md
keywords: index, follow
---

# CVE-2012-1940

Publication date 6 June 2012

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

Use-after-free vulnerability in the nsFrameList::FirstChild function in
Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5,
Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and
SeaMonkey before 2.10 allows remote attackers to execute arbitrary code or
cause a denial of service (heap memory corruption and application crash) by
changing the size of a container of absolutely positioned elements in a
column.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 13.10 saucy | Not affected |
| 13.04 raring | Not affected |
| 12.10 quantal | Not affected |
| 12.04 LTS precise | Fixed 13.0+build1-0ubuntu0.12.04.1 |
| 11.10 oneiric | Fixed 13.0+build1-0ubuntu0.11.10.1 |
| 11.04 natty | Fixed 13.0+build1-0ubuntu0.11.04.1 |
| 10.04 LTS lucid | Fixed 13.0+build1-0ubuntu0.10.04.1 |
| 8.04 LTS hardy | Ignored end of life |
| seamonkey | 13.10 saucy | Not in release |
| 13.04 raring | Not in release |
| 12.10 quantal | Not in release |
| 12.04 LTS precise | Not in release |
| 11.10 oneiric | Ignored end of life |
| 11.04 natty | Ignored end of life |
| 10.04 LTS lucid | Ignored end of life |
| 8.04 LTS hardy | Ignored end of life |
| thunderbird | 13.10 saucy | Not affected |
| 13.04 raring | Not affected |
| 12.10 quantal | Not affected |
| 12.04 LTS precise | Fixed 13.0.1+build1-0ubuntu0.12.04.1 |
| 11.10 oneiric | Fixed 13.0.1+build1-0ubuntu0.11.10.1 |
| 11.04 natty | Fixed 13.0.1+build1-0ubuntu0.11.04.1 |
| 10.04 LTS lucid | Fixed 13.0.1+build1-0ubuntu0.10.04.1 |
| 8.04 LTS hardy | Ignored end of life |
| xulrunner-1.9.2 | 13.10 saucy | Not in release |
| 13.04 raring | Not in release |
| 12.10 quantal | Not in release |
| 12.04 LTS precise | Not in release |
| 11.10 oneiric | Not in release |
| 11.04 natty | Ignored end of life |
| 10.04 LTS lucid | Ignored end of life |
| 8.04 LTS hardy | Ignored end of life |
| xulrunner-2.0 | 13.10 saucy | Not in release |
| 13.04 raring | Not in release |
| 12.10 quantal | Not in release |
| 12.04 LTS precise | Not in release |
| 11.10 oneiric | Not in release |
| 11.04 natty | Ignored end of life |
| 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)

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-1940)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2012-1940)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2012-1940)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2012-1940)

### Related Ubuntu Security Notices (USN)

+ [USN-1463-1](https://usn.ubuntu.com/USN-1463-1)
+ Firefox vulnerabilities
+ 6 June 2012

+ [USN-1463-4](https://usn.ubuntu.com/USN-1463-4)
+ Thunderbird vulnerabilities
+ 22 June 2012

+ [USN-1463-6](https://usn.ubuntu.com/USN-1463-6)
+ Thunderbird vulnerabilities
+ 27 June 2012

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2012-1940>