Mozilla security advisory

Number: AV20-093
Date: 06 April 2020

On 3 April 2020 Mozilla released Firefox 74.0.1 and Firefox ESR 68.6.1 to address critical vulnerabilities in the Windows, macOS and Linux versions of Firefox. Under certain circumstances, a remote actor could exploit these vulnerabilities to take control of an affected system. In a Security Advisory, Mozilla stated that it is aware of targeted exploitation of the vulnerabilities.

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

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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