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CVE-2013-1300 is a privilege escalation vulnerability in the Win32k.sys kernel-mode driver in multiple versions of Microsoft Windows (XP SP2/SP3, Server 2003 SP2, Vista SP2, Server 2008 SP2/R2 SP1, 7 SP1, 8, Server 2012, RT). The flaw arises from improper handling of memory objects due to a discrepancy in buffer size calculation and interpretation in the Win32k subsystem, specifically in the handling of ASCII and WCHAR string conversions during message passing between threads. By crafting a call to NtUserMessageCall with specific arguments, a local attacker can overwrite critical kernel structures, such as the EPROCESS and QuotaBlock pointers, enabling arbitrary code execution in kernel mode and privilege escalation to SYSTEM. The vulnerability was notably used in a Pwn2Own 2013 Chrome sandbox escape chain.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module (ms13_053_schlamperei.rb) that exploits a local privilege escalation vulnerability (CVE-2013-1300, MS13-053) in the Windows kernel (win32k.sys) on Windows 7 SP0/SP1 32-bit systems. The exploit works by injecting a specially crafted DLL into a process (typically notepad.exe), which then triggers a kernel pool overflow to null the ACL of the winlogon.exe process. This allows the attacker to migrate their session into winlogon.exe and gain SYSTEM privileges. The module is operational and requires a Meterpreter session on a vulnerable system. The code checks the version of win32k.sys to determine if the target is exploitable. The exploit is notable for its use in the 2013 Pwn2Own competition and is a classic example of a local privilege escalation via kernel vulnerability. The only file in the repository is the Metasploit module itself, written in Ruby, and it leverages standard Metasploit libraries for post-exploitation and reflective DLL injection.
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