CVE-2026-20924 Windows Management Services 释放后使用权限提升漏洞

// CVE-2026-20924 PoC - Windows Management Services Use-After-Free // This PoC demonstrates the vulnerability pattern (educational purposes only) #include <windows.h> #include <stdio.h> #include <winternl.h> // Simplified PoC structure for vulnerability demonstration typedef struct _MANAGEMENT_SERVICE_OBJECT { PVOID vtable; DWORD refCount; PVOID allocatedBuffer; DWORD bufferSize; } MANAGEMENT_SERVICE_OBJECT, *PMANAGEMENT_SERVICE_OBJECT; // Trigger the use-after-free condition void TriggerUAF() { printf("[*] CVE-2026-20924 PoC - Windows Management Services UAF\n"); printf("[*] Target: Windows with vulnerable Windows Management Services\n\n"); // Step 1: Create initial object PMANAGEMENT_SERVICE_OBJECT pObject = (PMANAGEMENT_SERVICE_OBJECT)HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MANAGEMENT_SERVICE_OBJECT) ); if (pObject == NULL) { printf("[-] Failed to allocate object\n"); return; } printf("[+] Step 1: Created management service object at %p\n", pObject); // Step 2: Allocate buffer and assign to object pObject->allocatedBuffer = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, 0x1000 ); pObject->bufferSize = 0x1000; pObject->refCount = 1; printf("[+] Step 2: Allocated buffer at %p\n", pObject->allocatedBuffer); // Step 3: Free the object (simulating the vulnerability) printf("[+] Step 3: Freeing object (simulating vulnerability condition)\n"); HeapFree(GetProcessHeap(), 0, pObject); // Step 4: Use freed object (UAF condition - accessing freed memory) printf("[+] Step 4: Attempting to access freed object at %p\n", pObject); printf("[!] UAF Condition: Object accessed after free\n"); printf("[!] This is the vulnerability - freed memory may contain attacker-controlled data\n"); // In real exploitation, attacker would spray heap and control object layout // to achieve arbitrary code execution with elevated privileges printf("\n[*] Note: This is a simplified demonstration of the vulnerability pattern\n"); printf("[*] Real exploitation requires specific conditions and Windows version\n"); } int main() { printf("========================================\n"); printf(" CVE-2026-20924 PoC Demonstration\n"); printf(" Windows Management Services UAF\n"); printf("========================================\n\n"); TriggerUAF(); printf("\n[*] PoC completed\n"); return 0; }