---
title: "CVE-2015-4487\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-2015-4487?format=md
keywords: index, follow
---
# CVE-2015-4487
Publication date 11 August 2015
Last updated 24 July 2024
---
Ubuntu priority
**Medium**
[Why this priority?](https://ubuntu.com/security/cves/about#priority )
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## Description
The nsTSubstring::ReplacePrep function in Mozilla Firefox before 40.0,
Firefox ESR 38.x before 38.2, and Firefox OS before 2.2 might allow remote
attackers to cause a denial of service (memory corruption) or possibly have
unspecified other impact via unknown vectors, related to an "overflow."
## Status
Show unmaintained releases
| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 15.04 vivid | Fixed 40.0+build4-0ubuntu0.15.04.1 |
| 14.04 LTS trusty | Fixed 40.0+build4-0ubuntu0.14.04.1 |
| 12.04 LTS precise | Fixed 40.0+build4-0ubuntu0.12.04.1 |
| thunderbird | 15.04 vivid | Fixed 1:38.2.0+build1-0ubuntu0.15.04.1 |
| 14.04 LTS trusty | Fixed 1:38.2.0+build1-0ubuntu0.14.04.1 |
| 12.04 LTS precise | Fixed 1:38.2.0+build1-0ubuntu0.12.04.2 |
---
* [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-2015-4487)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-4487)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-4487)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-4487)
### Related Ubuntu Security Notices (USN)
+ [USN-2702-1](https://usn.ubuntu.com/USN-2702-1)
+ Firefox vulnerabilities
+ 11 August 2015
+ [USN-2712-1](https://usn.ubuntu.com/USN-2712-1)
+ Thunderbird vulnerabilities
+ 25 August 2015
### Other references
*
*