在发生溢出之后,我们可以期待该handler字段将被我们伪造的SEH handler的地址所覆盖。 图22 memcpy对堆栈末端之外执行写入操作是抛出的访问违例异常(Access violation exception) 在memcpy函数中,由于rep MOVSB指令试图将数据写入堆栈的末端之外的内存时,发生了访问违例异常。在0x00B9ABCC处,我们可以看到EXCEPTION_REGISTRATION...
LPVOID pLocalView = MapViewOfFile(hMapping, FILE_MAP_WRITE, 0, 0, payloadLen); memcpy(pLocalView, payload, payloadLen); HANDLE hProcess = OpenProcess(PROCESS_CREATE_THREAD | PROCESS_QUERY_INFORMATION | PROCESS_VM_OPERATION | PROCESS_VM_READ | PROCESS_VM_WRITE, FALSE, pid); LPVOID pRemot...
这是因为像memcpy这样的API仍然有效,并且这些CRT API的非POSIX变体也是如此(例如KERNEL32.DLL!lstrcpyA)。当我们试图在Visual Studio 2019中编译包含这些“被退休”的API的应用程序时,会触发严重的编译错误,尽管这些错误是可抑制的。 堆栈Cookie是试图“修复”和防止栈溢出漏洞在运行时被利用的第一道防护机制。SafeSEH...
// Now Patch Physical Memory memcpy(pV2->lpAddress, pV2->lpPatchContext, pV2->ulSize); DbgPrint("[Wxoit] ModifyPhysicalAddressX86 pV2->lpAddress:%x, Context:%x\r\n", pV2->lpAddress, *(ULONG*)pV2->lpAddress); } } __except(EXCEPTION_EXECUTE_HANDLER) { DbgPrint("[Wxoit] Modify...
memcpy(pV2->lpAddress, pV2->lpPatchContext, pV2->ulSize); DbgPrint("[Wxoit] ModifyPhysicalAddressX86 pV2->lpAddress:%x, Context:%x\r\n", pV2->lpAddress, *(ULONG*)pV2->lpAddress); } } __except(EXCEPTION_EXECUTE_HANDLER)
memcpy(pClipData, pData, len); ret = GlobalUnlock(hClipData); ret = OpenClipboard(hWnd); ret = EmptyClipboard(); SetClipboardData(CF_BITMAP, hClipData); ret = CloseClipboard(); DeleteObject(hBitmap); ReleaseDC(hWnd, hClientDC); ...
memcpy(str,a,sizeof(a)); printf("string is %s\n Address is %p\n",str,str); str = (char*)realloc(str,20*sizeof(char)); printf("string is %s\n Address is %p\n",str,str); 27、小函数 睡眠函数 sleep(unsigned seconds);
原版： void *memcpy( void *dest, const void *src, size_t count ) { ASSERT((dest != NULL...
memcpy((LPVOID)dest, (LPVOID)(ADDR1a | srcflds.offset), len); } else { return FALSE; } return TRUE; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25.
memcpy(&pPerHandle->addr, &saRemote, nRemoteLen); ::CreateIoCompletionPort((HANDLE)pPerHandle->s, hCompletion, (DWORD)pPerHandle, 0); //投递一个接收请求 PPER_IO_DATA pPerIO = (PPER_IO_DATA)::GlobalAlloc(GPTR, sizeof(PER_IO_DATA)); ...