What do I do?
The patches for these vulnerabilities are provided by Microsoft as part of the January 2020 Security updates released on 15 January 2020 (AEDT).
Further information
Microsoft Advisory - CVE-2020-0601 - Security Update Guide - Microsoft - Windows CryptoAPI Spoofing Vulnerability
Microsoft Advisory - CVE-2020-0609 - Security Update Guide - Microsoft - Windows Remote Desktop Gateway (RD Gateway) Remote Code Execution Vulnerability
Microsoft Advisory - CVE-2020-0610 - Security Update Guide - Microsoft - Windows Remote Desktop Gateway (RD Gateway) Remote Code Execution Vulnerability
Microsoft Advisory - CVE-2020-0611 - Security Update Guide - Microsoft - Remote Desktop Client Remote Code Execution Vulnerability
US-CERT Alert AA20-014A - Critical Vulnerabilities in Microsoft Windows Operating Systems | CISA
NSA Cyber Security Advisory- Patch Critical Cryptographic Vulnerability in Microsoft Windows Clients and Servers