Web Application Security

GOWPT – Go Web Application Penetration Test

GOWPT is the younger brother of wfuzz a swiss army knife of WAPT, it allow pentester to perform huge activity with no stress at all, just configure it and it’s just a matter of clicks.

How to install
To install gowpt just type:

make
sudo make install

Usage
From the -h menu

Usage of gowpt:
  -H value
     A list of additional headers
  -a string
     Basic authentication (user:password)
  -c string
     A list of cookies
  -d string
     POST data for request
  -e string
     A list of comma separated encoders (default "plain")
  -f string
     Filter the results
  -from-proxy
     Get the request via a proxy server
  -fuzz
     Use the built-in fuzzer
  -p string
     Use upstream proxy
  -ssl
     Use SSL
  -t string
     Template for request
  -threads int
     Number of threads (default 10)
  -u string
     URL to fuzz
  -w string
     Wordlist file
  -x string
     Extension file example.js

Examples
Scan http://www.example.com and filter all 200 OK requests

gowpt -u "http://www.example.com/FUZZ" -w wordlist/general/common.txt -f "code == 200"

Scan http://www.example.com fuzzing vuln GET parameter looking for XSS (assume it had 200 tag with a legit request)

gowpt -u "http://www.example.com/?vuln=FUZZ" -w wordlist/Injections/XSS.txt -f "tags > 200"

Scan http://www.example.com fuzzing vuln POST parameter looking for XSS (assume it had 200 tag with a legit request)

gowpt -u "http://www.example.com/" -d "vuln=FUZZ" -w wordlist/Injections/XSS.txt -f "tags > 200"

Scan auth protected http://www.example.com and filter all 200 OK requests

gowpt -u "http://www.example.com/FUZZ" -w wordlist/general/common.txt -f "code == 200" -a "user:password"

Scan http://www.example.com adding header Hello: world and filter all 200 OK requests

gowpt -u "http://www.example.com/FUZZ" -w wordlist/general/common.txt -f "code == 200" -H "Hello: world"

Scan http://www.example.com using basic auth with user/pass guest:guest

gowpt -u "http://www.example.com/FUZZ" -w wordlist/general/common.txt -a "guest:guest"

Scan http://www.example.com adding an extension

gowpt -u "http://www.example.com/FUZZ" -w wordlist/general/common.txt -x myextension.js

Scan http://www.example.com (received from proxy) and filter all 200 OK requests

gowpt --from-proxy -w wordlist/general/common.txt

Then open BurpSuite send the request you want to fuzz to repeater and set an upstream proxy to 127.0.0.1:31337 when you’re ready click send, if everything was right you should see as response Request received by GOWPT

Extension
Extension are an easy way to extend gowpt features, a JavaScript VM is the responsable for loading and executing extension files.

JS Api
Below a list of currently implemented API

Method Number of params Description Params
addCustomEncoder 2 Create a custom encoder to be used with wordlists Param1 -> EncoderName (string)
Param2 -> EncoderLogic (function)
panic 1 For debugging purpose crash the application Param1 -> PanicText (string)
dumpResponse 2 Dump a full request/response to disk, useful to save testcase Param1 -> ResponseObject (http.Response)
Param2 -> Path (string)
setHTTPInterceptor 1 Create an interceptor for outgoing HTTP Request and ingoing reponses Param1 -> HTTPCallback (function) *
sendRequestSync * 4 Send an HTTP Request in a synchronous way Param1 -> Method (string)
Param2 -> Url (string)
Param3 -> PostData (string)
Param4 -> Headers (Object{Name:Value})

* PS: When using setHTTPInterceptor the callback method receive 3 paramters:

  • A request/response object
  • A result object
  • A flag object that indicate whenever the first object is a request or a response

Since the nature of sendRequestSync it will slow down the engine due to synchronous request so use moderately
More info on the example extension below:
example.js

/*
* Create a custom encoder called helloworld
*
* This encore just add the string "_helloworld" to every payload
* coming from the wordlist
*/
addCustomEncoder("helloworld", myenc);
/*
* Define the callback method for the helloworld encoder
*/
function myenc(data) {
 return data + "_helloword";
}
/*
* Create an HTTP interceptor
*
* The interceptor will hook every request / response
* is possible to modify request before send it, anyway the respose item
* it's just shadow copy of the one received from the server so no modification
* are possible
*
*
* request_response is an object which may contains both http.Request
* or http.Response , to know which on is contained check is_request flag
*
* REMEMBER! request_response is an http.* object so you must interact with
* this one just like you would do in golang!
*
* dumpResponse is a built-in function which dump full request-response to
* disk.
* result is an object filled with stats about the response it contains some fields
*
* result.tags => Number of tags in the response
* result.code => HTTP Response status
* result.words => Number of words in the response
* result.lines => Number of lines in the response
* result.chars => Number of chars in the response
* result.request => Full dump of the request
* result.response => Full dump of the response
* result.response => The injected payload
*
*/
setHTTPInterceptor(function(request_response, result, is_request){
 if(is_request){
  request_response.Header.Set("Hello", "world")
 }else{
  dumpResponse(request_response, "/tmp/dump.txt")
  /*
  * Send an HTTP request in a synchronous way
  *
  * This API accept 4 parameters:
  * method => GET | POST | HEAD | PUT | PATCH | UPDATE
  * url => The url of the HTTP service
  * post_data => The content of request bodyBytes
  * headers => A javascript dictionary {headerName => headerValue}
  *
  * The response object may be null or undefined or an http.Response from golang
  */
  var response = sendRequestSync("GET", "http://example.com/", null, {"Fake": "Header"})
 }
})

Wordlists
Wordlists comes from wfuzz project! so thanks much guys!

Encoders
Below the list of encoders available

  • url (URL encode)
  • urlurl (Double URL encode)
  • html (HTML encode)
  • htmlhex (HTML hex encode)
  • unicode (Unicode encode)
  • hex (Hex encode)
  • md5hash (MD5 hash)
  • sha1hash (SHA1 hash)
  • sha2hash (SHA2 hash)
  • b64 (Base64 encode)
  • b32 (Base32 encode)
  • plain (No encoding)

Filters
You can apply filters on the following variables

  • tags (Number of tags)
  • lines (Number of lines of response body)
  • words (Number of words of response body)
  • length (Size of response body)
  • code (HTTP status code)
  • chars (Number of chars of response body)

 

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Icarus

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