Number: AV19-211
Date: 23 September 2019
On 23 September 2019 Microsoft released two out-of-band patches to address recently disclosed vulnerabilities in Internet Explorer and Windows Defender. These vulnerabilities are being tracked as CVE-2019-1367 and CVE-2019-1255, respectively.
The vulnerability in Internet Explorer could allow a remote, unauthenticated actor to run arbitrary code with the same privileges as the user.
The vulnerability in Windows Defender could allow an actor to cause a denial of service condition on the victim machine by preventing users from executing legitimate system binaries. It should be noted that the actor would first require execution privileges on the victim machine.
The Cyber Centre encourages users and administrators to review the appropriate Microsoft update webpages and apply the necessary updates:
Internet Explorer:https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1367
Windows Defender:https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1367
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.