Mozilla Critical Patch Update Advisory

Number: AV16-194
Date: 1 December 2016


The purpose of this advisory is to bring attention to the following critical patch updates released for Mozilla Firefox, Firefox ESR and Thunderbird for which an update is now available.


Mozilla released security updates to address a critical vulnerability Mozilla Firefox, Firefox ESR and Thunderbird.

Version affected:
Firefox versions prior to 50.0.2
ESR versions prior to 45.5.1
Thunderbird versions prior to 45.5.1

CVE References: CVE-2016-9079

Suggested Action

CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly.


Note to Readers

In support of Public Safety's mission to build a safe and resilient Canada, CCIRC's mandate is to help ensure the security and resilience of the vital non-federal government cyber systems that underpin Canada's national security, public safety and economic prosperity. As Canada's computer security incident response team, CCIRC is Canada's national coordination centre for the prevention and mitigation of, preparedness for, response to, and recovery from cyber incidents on non-federal government systems. It does this by providing authoritative advice and support, and coordinating information sharing and incident response.

Please note, CCIRC PGP key has recently been updated.

For general information, please contact Public Safety Canada's Public Affairs division at:

Telephone: 613-944-4875 or 1-800-830-3118
Fax: 613-998-9589

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