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https://github.com/carlospolop/hacktricks
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155 lines
8.8 KiB
Markdown
155 lines
8.8 KiB
Markdown
# Pentesting gRPC-Web
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<details>
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<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>
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* 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)！
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* 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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* 获取[**官方PEASS & HackTricks商品**](https://peass.creator-spring.com)
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* **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)**。**
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* **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来分享你的黑客技巧。**
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</details>
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## **操作gRPC-Web负载**
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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)。
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### **手动使用gGRPC Coder工具**
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1. 首先解码负载：
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```bash
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echo "AAAAABYSC0FtaW4gTmFzaXJpGDY6BVhlbm9u" | python3 grpc-coder.py --decode --type grpc-web-text | protoscope > out.txt
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```
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2. 编辑解码后的有效载荷内容
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```
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nano out.txt
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2: {"Amin Nasiri Xenon GRPC"}
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3: 54
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7: {"<script>alert(origin)</script>"}
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```
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3. 编码新的有效载荷
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```bash
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protoscope -s out.txt | python3 grpc-coder.py --encode --type grpc-web-text
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```
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4. 使用 Burp 拦截器中的输出：
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```
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AAAAADoSFkFtaW4gTmFzaXJpIFhlbm9uIEdSUEMYNjoePHNjcmlwdD5hbGVydChvcmlnaW4pPC9zY3JpcHQ+
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```
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### **手动使用 gRPC-Web Coder Burp Suite 扩展**
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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。
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## **分析 gRPC-Web Javascript 文件**
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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。
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1. 下载 Javascript gRPC-Web 文件
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2. 使用 grpc-scan.py 扫描它：
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```bash
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python3 grpc-scan.py --file main.js
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```
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3. 分析输出并测试新的端点和新服务：
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```
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Output:
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Found Endpoints:
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/grpc.gateway.testing.EchoService/Echo
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/grpc.gateway.testing.EchoService/EchoAbort
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/grpc.gateway.testing.EchoService/NoOp
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/grpc.gateway.testing.EchoService/ServerStreamingEcho
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/grpc.gateway.testing.EchoService/ServerStreamingEchoAbort
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Found Messages:
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grpc.gateway.testing.EchoRequest:
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+------------+--------------------+--------------+
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| Field Name | Field Type | Field Number |
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+============+====================+==============+
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| Message | Proto3StringField | 1 |
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+------------+--------------------+--------------+
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| Name | Proto3StringField | 2 |
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+------------+--------------------+--------------+
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| Age | Proto3IntField | 3 |
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+------------+--------------------+--------------+
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| IsAdmin | Proto3BooleanField | 4 |
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+------------+--------------------+--------------+
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| Weight | Proto3FloatField | 5 |
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+------------+--------------------+--------------+
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| Test | Proto3StringField | 6 |
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+------------+--------------------+--------------+
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| Test2 | Proto3StringField | 7 |
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+------------+--------------------+--------------+
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| Test3 | Proto3StringField | 16 |
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+------------+--------------------+--------------+
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| Test4 | Proto3StringField | 20 |
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+------------+--------------------+--------------+
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grpc.gateway.testing.EchoResponse:
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+--------------+--------------------+--------------+
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| Field Name | Field Type | Field Number |
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+==============+====================+==============+
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| Message | Proto3StringField | 1 |
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+--------------+--------------------+--------------+
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| Name | Proto3StringField | 2 |
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+--------------+--------------------+--------------+
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| Age | Proto3IntField | 3 |
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+--------------+--------------------+--------------+
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| IsAdmin | Proto3BooleanField | 4 |
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+--------------+--------------------+--------------+
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| Weight | Proto3FloatField | 5 |
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+--------------+--------------------+--------------+
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| Test | Proto3StringField | 6 |
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+--------------+--------------------+--------------+
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| Test2 | Proto3StringField | 7 |
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+--------------+--------------------+--------------+
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| Test3 | Proto3StringField | 16 |
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+--------------+--------------------+--------------+
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| Test4 | Proto3StringField | 20 |
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+--------------+--------------------+--------------+
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| MessageCount | Proto3IntField | 8 |
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+--------------+--------------------+--------------+
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grpc.gateway.testing.ServerStreamingEchoRequest:
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+-----------------+-------------------+--------------+
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| Field Name | Field Type | Field Number |
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+=================+===================+==============+
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| Message | Proto3StringField | 1 |
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+-----------------+-------------------+--------------+
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| MessageCount | Proto3IntField | 2 |
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+-----------------+-------------------+--------------+
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| MessageInterval | Proto3IntField | 3 |
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+-----------------+-------------------+--------------+
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grpc.gateway.testing.ServerStreamingEchoResponse:
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+------------+-------------------+--------------+
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| Field Name | Field Type | Field Number |
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+============+===================+==============+
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| Message | Proto3StringField | 1 |
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+------------+-------------------+--------------+
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grpc.gateway.testing.ClientStreamingEchoRequest:
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+------------+-------------------+--------------+
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| Field Name | Field Type | Field Number |
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+============+===================+==============+
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| Message | Proto3StringField | 1 |
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+------------+-------------------+--------------+
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grpc.gateway.testing.ClientStreamingEchoResponse:
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+--------------+----------------+--------------+
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| Field Name | Field Type | Field Number |
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+==============+================+==============+
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| MessageCount | Proto3IntField | 1 |
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+--------------+----------------+--------------+
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```
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## 参考资料
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* [Amin Nasiri 编写的《入侵 gRPC-Web 文章》](https://infosecwriteups.com/hacking-into-grpc-web-a54053757a45)
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* [gRPC-Web Pentest Suite](https://github.com/nxenon/grpc-pentest-suite)
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<details>
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<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>
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* 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)！
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* 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)
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||
* 获取[**官方的 PEASS & HackTricks 商品**](https://peass.creator-spring.com)
|
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* **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)**。**
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* **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。**
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</details>
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