# MA-487.072015: MyCERT Advisory - Mozilla Releases Security Updates for Firefox, Firefox ESR, and Thunderbird

**Date:** 09 Jul 2015  
**Source:** https://www.mycert.org.my/portal/advisory?id=MA-487.072015  
**Advisory ID:** MA-487.072015

---

#### **1.0 Introduction**
The Mozilla Foundation has released security updates to address vulnerabilities in Firefox, Firefox ESR, and Thunderbird. Mozilla encourages users and administrators to review Mozilla's Security Updates and apply the necessary updates.
**2.0 Impact**
These updates address vulnerabilities that could potentially allow an attacker to take control of an affected system.
**3.0 Affected Products**
The detail lists of the Mozilla products updates are as below:
- Firefox 39
- Firefox ESR 38.1
- Thunderbird 38.1
**4.0 Recommendation**
MyCERT highly recommended users of these applications to upgrade to the latest version of the affected products. The following updates are available:
**4.1 Mozilla Firefox 39**
Advisories can be referred at:
<https://www.mozilla.org/en-GB/security/known-vulnerabilities/firefox/>
Can be downloaded at:
<https://www.mozilla.org/en-GB/firefox/new/>
**4.2 Mozilla Firefox ESR 38.1**
Advisories can be referred at:
<https://www.mozilla.org/en-GB/security/known-vulnerabilities/firefox-esr/>
Can be downloaded at:
<https://www.mozilla.org/en-US/firefox/organizations/all/>
**4.3 Mozilla Thunderbird 38.1**
Advisories can be referred at:
<https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/>
Can be downloaded at:
<https://www.mozilla.org/en-GB/thunderbird/>
Generally, MyCERT advises the users of this software to be updated with the latest security announcements by the vendor and follow best practice security policies to determine which updates should be applied.
For further enquiries, please contact MyCERT through the following channels:
E-mail : [[email protected]](/cdn-cgi/l/email-protection#187b617a7d6a212121587b617a7d6a6b7d7b6d6a716c61367561) or [[email protected]](/cdn-cgi/l/email-protection#620f1b01071016220f1b010710164c0d10054c0f1b) 
Phone : 1-300-88-2999 (monitored during business hours)
Fax : +603 89453442 
Handphone : +60 19 2665850 (24x7 call incident reporting)
SMS : CYBER999 REPORT EMAIL COMPLAINT to 15888
Business Hours : Mon - Fri 09:00 AM - 18:00 PM MYT
Web : [https://www.mycert.org.my](https://www.mycert.org.my/)
Twitter : <http://www.twitter.com/mycert>
Facebook: <http://www.facebook.com/mycert.org.my>
Cyber999 Mobile Apps:  [IOS Users](https://itunes.apple.com/my/app/cyber999-mobile-application/id888552400?mt=8&ign-mpt=uo%3D4) or [Android Users](https://play.google.com/store/apps/details?id=my.cyber999.mobile)
**5.0 References**
- Mozilla Releases Security Updates for Firefox, Firefox ESR, and Thunderbird
<https://www.us-cert.gov/ncas/current-activity/2015/07/07/Mozilla-Releases-Security-Updates-Firefox-Firefox-ESR-and>
- Mozilla Foundation Security Advisories
<https://www.mozilla.org/en-US/security/advisories/>