Number: AV20-253
Date: 15 July 2020
On 14 July 2020 Microsoft released security updates to address vulnerabilities in multiple products. Included were critical patches for the following:
- Microsoft Windows
- Microsoft Windows Server
- Internet Explorer
- Microsoft Office
- Skype for Business
- Visual Studio
- .NET Framework
- Lync Server
Of note is a critical vulnerability, tracked as CVE-2020-1350, in all versions of Windows Server that are configured with the Domain Name System server role. This “wormable” vulnerability could allow a remote actor to run arbitrary code in the context of the Local System Account.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350
The Cyber Centre encourages users and administrators to review the following web links and apply the necessary updates as soon as possible.
https://portal.msrc.microsoft.com/en-us/security-guidance
Release Notes:
https://portal.msrc.microsoft.com/en-us/security-guidance/releasenotedetail/2020-Jul
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.