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hacktricks/pentesting-web/grpc-web-pentest.md

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Translated ['pentesting-web/grpc-web-pentest.md'] to cn
2023-12-24 19:03:58 +00:00
# Pentesting gRPC-Web
<details>
<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
* 如果您在**网络安全公司**工作，想在**HackTricks**上看到您的**公司广告**，或者想要获取**PEASS最新版本或下载HackTricks的PDF**？请查看[**订阅计划**](https://github.com/sponsors/carlospolop)！
* 发现[**PEASS家族**](https://opensea.io/collection/the-peass-family)，我们独家的[**NFTs系列**](https://opensea.io/collection/the-peass-family)
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</details>
## **操作gRPC-Web负载**
gRPC-Web在请求中使用Content-Type: `application/grpc-web-text`，这是一种以base64编码形式的protobuf，您可以使用[gprc-coder](https://github.com/nxenon/grpc-pentest-suite)工具，并且还可以安装其[Burp Suite扩展](https://github.com/nxenon/grpc-pentest-suite)。
### **手动使用gGRPC Coder工具**
1. 首先解码负载：
```bash
echo "AAAAABYSC0FtaW4gTmFzaXJpGDY6BVhlbm9u" | python3 grpc-coder.py --decode --type grpc-web-text | protoscope > out.txt
```
2. 编辑解码后的有效载荷内容
```
nano out.txt
2: {"Amin Nasiri Xenon GRPC"}
3: 54
7: {"<script>alert(origin)</script>"}
```
3. 编码新的有效载荷
```bash
protoscope -s out.txt | python3 grpc-coder.py --encode --type grpc-web-text
```
4. 使用 Burp 拦截器中的输出：
```
AAAAADoSFkFtaW4gTmFzaXJpIFhlbm9uIEdSUEMYNjoePHNjcmlwdD5hbGVydChvcmlnaW4pPC9zY3JpcHQ+
```
### **手动使用 gRPC-Web Coder Burp Suite 扩展**
您可以在 [gRPC-Web Pentest Suite](https://github.com/nxenon/grpc-pentest-suite) 中使用 gRPC-Web Coder Burp Suite 扩展，这更简单。您可以在其仓库中阅读安装和使用说明。
## **分析 gRPC-Web Javascript 文件**
每个 gRPC-Web 应用程序中至少有一个 Javascript 文件。您可以分析该文件以发现新的消息、端点和服务。尝试使用 [gRPC-Scan](https://github.com/nxenon/grpc-pentest-suite) 工具。
1. 下载 Javascript gRPC-Web 文件
2. 使用 grpc-scan.py 扫描它：
```bash
python3 grpc-scan.py --file main.js
```
3. 分析输出并测试新的端点和新服务：
```
Output:
Found Endpoints:
/grpc.gateway.testing.EchoService/Echo
/grpc.gateway.testing.EchoService/EchoAbort
/grpc.gateway.testing.EchoService/NoOp
/grpc.gateway.testing.EchoService/ServerStreamingEcho
/grpc.gateway.testing.EchoService/ServerStreamingEchoAbort
Found Messages:
grpc.gateway.testing.EchoRequest:
+------------+--------------------+--------------+
| Field Name | Field Type | Field Number |
+============+====================+==============+
| Message | Proto3StringField | 1 |
+------------+--------------------+--------------+
| Name | Proto3StringField | 2 |
+------------+--------------------+--------------+
| Age | Proto3IntField | 3 |
+------------+--------------------+--------------+
| IsAdmin | Proto3BooleanField | 4 |
+------------+--------------------+--------------+
| Weight | Proto3FloatField | 5 |
+------------+--------------------+--------------+
| Test | Proto3StringField | 6 |
+------------+--------------------+--------------+
| Test2 | Proto3StringField | 7 |
+------------+--------------------+--------------+
| Test3 | Proto3StringField | 16 |
+------------+--------------------+--------------+
| Test4 | Proto3StringField | 20 |
+------------+--------------------+--------------+
grpc.gateway.testing.EchoResponse:
+--------------+--------------------+--------------+
| Field Name | Field Type | Field Number |
+==============+====================+==============+
| Message | Proto3StringField | 1 |
+--------------+--------------------+--------------+
| Name | Proto3StringField | 2 |
+--------------+--------------------+--------------+
| Age | Proto3IntField | 3 |
+--------------+--------------------+--------------+
| IsAdmin | Proto3BooleanField | 4 |
+--------------+--------------------+--------------+
| Weight | Proto3FloatField | 5 |
+--------------+--------------------+--------------+
| Test | Proto3StringField | 6 |
+--------------+--------------------+--------------+
| Test2 | Proto3StringField | 7 |
+--------------+--------------------+--------------+
| Test3 | Proto3StringField | 16 |
+--------------+--------------------+--------------+
| Test4 | Proto3StringField | 20 |
+--------------+--------------------+--------------+
| MessageCount | Proto3IntField | 8 |
+--------------+--------------------+--------------+
grpc.gateway.testing.ServerStreamingEchoRequest:
+-----------------+-------------------+--------------+
| Field Name | Field Type | Field Number |
+=================+===================+==============+
| Message | Proto3StringField | 1 |
+-----------------+-------------------+--------------+
| MessageCount | Proto3IntField | 2 |
+-----------------+-------------------+--------------+
| MessageInterval | Proto3IntField | 3 |
+-----------------+-------------------+--------------+
grpc.gateway.testing.ServerStreamingEchoResponse:
+------------+-------------------+--------------+
| Field Name | Field Type | Field Number |
+============+===================+==============+
| Message | Proto3StringField | 1 |
+------------+-------------------+--------------+
grpc.gateway.testing.ClientStreamingEchoRequest:
+------------+-------------------+--------------+
| Field Name | Field Type | Field Number |
+============+===================+==============+
| Message | Proto3StringField | 1 |
+------------+-------------------+--------------+
grpc.gateway.testing.ClientStreamingEchoResponse:
+--------------+----------------+--------------+
| Field Name | Field Type | Field Number |
+==============+================+==============+
| MessageCount | Proto3IntField | 1 |
+--------------+----------------+--------------+
```
## 参考资料
* [Amin Nasiri 编写的《入侵 gRPC-Web 文章》](https://infosecwriteups.com/hacking-into-grpc-web-a54053757a45)
* [gRPC-Web Pentest Suite](https://github.com/nxenon/grpc-pentest-suite)
<details>
<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
* 您在**网络安全公司**工作吗？想在**HackTricks**中看到您的**公司广告**吗？或者想要访问**最新版本的 PEASS 或下载 HackTricks 的 PDF**吗？查看[**订阅计划**](https://github.com/sponsors/carlospolop)！
* 发现[**PEASS 家族**](https://opensea.io/collection/the-peass-family)，我们独家的[**NFTs 集合**](https://opensea.io/collection/the-peass-family)
* 获取[**官方的 PEASS & HackTricks 商品**](https://peass.creator-spring.com)
* **加入**[**💬**](https://emojipedia.org/speech-balloon/) [**Discord 群组**](https://discord.gg/hRep4RUj7f) 或 [**telegram 群组**](https://t.me/peass) 或在 **Twitter** 上**关注**我 [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks_live)**。**
* **通过向** [**hacktricks 仓库**](https://github.com/carlospolop/hacktricks) **和** [**hacktricks-cloud 仓库**](https://github.com/carlospolop/hacktricks-cloud) **提交 PR 来分享您的黑客技巧。**
</details>
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