Number: AV19-200
Date: 10 septembre 2019
On 10 September 2019 Microsoft released security updates to address multiple vulnerabilities affecting some of its products. This rollup provides fixes for several critical vulnerabilities, including vulnerabilities in its Remote Desktop Client (RDC) and Microsoft SharePoint.
The RDC vulnerabilities would allow for arbitrary code execution on the local machine if that machine was to connect to a compromised or malicious server using the RDC. There is no method of forcing a machine to connect to a server, although machines could be tricked into connecting through social engineering campaigns or man-in-the-middle attacks.
Another critical vulnerability is in Microsoft SharePoint. This vulnerability could allow a remote actor to upload a specially crafted SharePoint application package to a vulnerable SharePoint server and run arbitrary code.
The Cyber Centre encourages users and administrators to review the Microsoft Security Updates 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.