---
title: "CVE-2012-1939\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-2012-1939?format=md
keywords: index, follow
---

# CVE-2012-1939

Publication date 5 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

jsinfer.cpp in Mozilla Firefox ESR 10.x before 10.0.5 and Thunderbird ESR
10.x before 10.0.5 does not properly determine data types, which allows
remote attackers to cause a denial of service (memory corruption and
application crash) or possibly execute arbitrary code via crafted
JavaScript code.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2012-1939?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 12.04 LTS precise | Not affected |
| 11.10 oneiric | Not affected |
| 11.04 natty | Not affected |
| 10.04 LTS lucid | Not affected |
| 8.04 LTS hardy | Ignored end of life |
| seamonkey | 12.04 LTS precise | Not in release |
| 11.10 oneiric | Not affected |
| 11.04 natty | Not affected |
| 10.04 LTS lucid | Not affected |
| 8.04 LTS hardy | Ignored end of life |
| thunderbird | 12.04 LTS precise | Not affected |
| 11.10 oneiric | Not affected |
| 11.04 natty | Not affected |
| 10.04 LTS lucid | Not affected |
| 8.04 LTS hardy | Ignored end of life |
| xulrunner-1.9.2 | 12.04 LTS precise | Not in release |
| 11.10 oneiric | Not in release |
| 11.04 natty | Not affected |
| 10.04 LTS lucid | Not affected |
| 8.04 LTS hardy | Ignored end of life |
| xulrunner-2.0 | 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)

## Notes

---

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

ESR version only

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-1939)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2012-1939)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2012-1939)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2012-1939)

### Other references

* <https://bugzilla.mozilla.org/show_bug.cgi?id=748613>
* <http://www.mozilla.org/security/announce/2012/mfsa2012-34.html>
* <https://www.cve.org/CVERecord?id=CVE-2012-1939>