Multiple Vulnerabilities in Mozilla Firefox

Number: AV16-029
Date: 12 February 2016


The purpose of this advisory is to raise awareness of critical vulnerabilities in Mozilla Firefox and Firefox ESR for which upgrades are now available.


On 11 February 2016, Mozilla released security updates to address multiple vulnerabilities in Firefox. The severity of these issues is critical.

Versions affected:
Firefox prior to version 44.0.2
Firefox ESR prior to 38.6.1

CVE References: CVE-2016-1948 and CVE-2016-1523.

Suggested Action

CCIRC recommends that systems administrators identify affected products in their environment and follow their patch management process 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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