(Pwn2Own) Microsoft SharePoint GenerateProxyAssembly Code Injection Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft SharePoint. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the GenerateProxyAssembly method. The issue results from the lack of proper validation of a user-supplied string before using it to execute C# code. An attacker can leverage this vulnerability to execute code in the context of SharePoint farm service account.