Mozilla security advisory

Number: AV19-105
Date: 22 May 2019

On 21 May 2019, Mozilla has released security updates to address vulnerabilities in Firefox and Firefox ESR. Some of the vulnerabilities could allow a remote, unauthenticated actor to execute arbitrary code on an affected system.

CCCS encourages users and administrators to review the Mozilla Foundation Security Advisories webpage and apply the necessary updates:

https://www.mozilla.org/en-US/security/advisories

Note to Readers

The Canadian Centre for Cyber Security (Cyber Centre) operates as part of the Communications Security Establishment. We are Canada’s national authority on cyber security and we lead the government’s response to cyber security events. As Canada's national computer security incident response team, the Cyber Centre works in close collaboration with government departments, critical infrastructure, Canadian businesses and international partners to prepare for, respond to, mitigate, and recover from cyber events. We do this by providing authoritative advice and support, and coordinating information sharing and incident response. The Cyber Centre is outward-facing, welcoming partnerships that help build a stronger, more resilient cyber space in Canada.

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