CVE-2013-1300

win32k.sys en controladores kernel-mode en Microsoft Windows XP SP2 y SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 y R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, y Windows RT no gestiona de forma adecuada los objetos en memoria, lo que provoca que usuarios locales obtengan privilegios a través de una aplicación manipulada, también conocido como "Win32k Memory Allocation Vulnerability."

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within NtUserMessageCall. The issue lies in the handling of boolean arguments. An attacker can leverage this vulnerability to raise privileges and execute code under the context of SYSTEM.

A kernel pool overflow in Win32k which allows local privilege escalation. The kernel shellcode nulls the ACL for the winlogon.exe process (a SYSTEM process). This allows any unprivileged process to freely migrate to winlogon.exe, achieving privilege escalation. Used in pwn2own 2013 by MWR to break out of chrome's sandbox. NOTE: when you exit the meterpreter session, winlogon.exe is likely to crash.