dpmemio.sys

ET&T Technology Co., Ltd. dpmemio.sys (ClevoECView) is a 12KB driver with only 9 imports that provides completely unrestricted arbitrary physical memory read/write and I/O port access with no authentication, no ACL, no address validation, and no size validation. MmUnmapIoSpace is not even imported, meaning every MmMapIoSpace call permanently leaks a system PTE mapping. An additional bug exists where MOVSXD sign-extension on a 32-bit UserBufferPtr provides a write-to-kernel-VA primitive. IOCTLs exposed via \\.\dpMemIO include 0xC80A2420 (arbitrary physical memory READ via MmMapIoSpace), 0xC80A2424 (arbitrary physical memory WRITE via MmMapIoSpace), 0xC80A2410/0xC80A2414 (I/O port read/write byte), 0xC80A2418/0xC80A241C (I/O port read/write variable size), and 0xC80A2428 (version/ping). VeriSign signed with a revoked certificate.

sc.exe create dpMemIO binPath=C:\windows\temp\dpmemio.sys type=kernel && sc.exe start dpMemIO