Number: AV21-475
Date: 24 September 2021
On 23 September 2021 Apple published Security Updates to address vulnerabilities in the following products:
- macOS Catalina – versions prior to Security Update 2021-006
- iOS – versions prior to 12.5.5
Exploitation of these vulnerabilities could allow arbitrary code execution.
Apple is aware of reports that exploits for both vulnerabilities exist in the wild, and of reports that the iOS vulnerabilities may have been actively exploited.
The Cyber Centre encourages users and administrators to review the following web links and apply the necessary updates.
macOS Catalina
https://support.apple.com/en-ca/HT212825
iOS
https://support.apple.com/en-ca/HT212824
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.