On Intel CPUs, sysret to non-canonical addresses causes a fault on the sysret instruction itself after the stack pointer is set to guest value but before the current privilege level (CPL) is changed. Windows is vulnerable due to the way the Windows User Mode Scheduler handles system requests. This module exploits the vulnerability and installs an agent with system privileges.
The On-Screen Keyboard application of Microsoft Windows is prone to a privilege escalation vulnerability when handling mouse input originated from a process running with Low Integrity Level. This vulnerability allows an agent running with Low Integrity Level to escalate privileges in order to install a new agent that will run with Medium Integrity Level, by sending mouse input to the On-Screen Keyboard when its input mode is set to "Hover over keys".