Mozilla Security Updates

Number: AV17-187
Date: 08 December 2017


The purpose of this advisory is to bring attention to a security update addressing multiple vulnerabilities in Firefox.


Mozilla released security updates to address vulnerabilities in Firefox and Firefox ESR.

Versions affected:
Firefox versions prior to 57.0.2
Firefox ESR versions prior to 52.5.2

CVE References: CVE-2017-7843, CVE-2017-7845

Suggested Action

CCIRC recommends that owner/operators test and deploy the vendor released updates to the affected platforms in accordance with their risk mitigation framework.


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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