# MA-656.042017: MyCERT Advisory - Mozilla Releases Security Update

**Date:** 26 Apr 2017  
**Source:** https://www.mycert.org.my/portal/advisory?id=MA-656.042017  
**Advisory ID:** MA-656.042017

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**1.0 Introduction**
Mozilla has released security updates to address a vulnerability in Firefox and Firefox ESR.
**2.0 Impact**
An attacker could exploit this vulnerability to take control of an affected system.
**3.0 Affected Product**
• Firefox prior to version 53
• Firefox ESR prior to version 52.1
**4.0 Recommendation**
MyCERT highly recommended users of these applications to upgrade to the latest version of the affected products. Kindly refer to the information provided at the below URL:
• <https://www.mozilla.org/en-US/security/advisories/>
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#dfbca6bdbaade6e6e69fbca6bdbaadacbabcaaadb6aba6f1b2a6) or [[email protected]](/cdn-cgi/l/email-protection#1d70647e786f695d70647e786f6933726f7a337064)
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
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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**
• <https://www.us-cert.gov/ncas/current-activity/2017/04/19/Mozilla-Releases-Security-Updates>
• <https://www.mozilla.org/en-US/security/advisories/mfsa2017-10/>
• <https://www.mozilla.org/en-US/security/advisories/mfsa2017-11/>
• <https://www.mozilla.org/en-US/security/advisories/mfsa2017-12/>