Lobe Chat prior to version 1.19.13 is vulnerable to server-side request forgery (SSRF) due to insufficient validation of redirects in the SSRF protection logic in src/app/api/proxy/route.ts. An attacker can supply a malicious external URL that redirects to internal resources, such as private network or loopback addresses, thereby bypassing the intended SSRF protections.
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This repository provides a proof-of-concept (PoC) exploit for CVE-2024-47066, a server-side request forgery (SSRF) vulnerability in Lobe Chat (prior to version 1.19.13). The main exploit script, CVE-2024-47066.py, is a Python program that automates the exploitation process. It works by first generating a shortened URL (using shorturl.at) that points to an internal resource. This bypasses the SSRF protection in Lobe Chat's /api/proxy endpoint, which only checks the resolved IP of the initial URL and not any redirects. The script then sends a POST request to the vulnerable endpoint with the shortened URL, causing the server to follow the redirect and access the internal resource. The repository also includes a Docker environment to simulate a vulnerable Lobe Chat instance and an internal Flask-based web service (on port 4000) for testing. The exploit demonstrates how an attacker could use this vulnerability to access internal services or sensitive cloud metadata endpoints (e.g., http://169.254.169.254). The code is well-structured, with clear separation between the exploit logic and the environment setup. The README provides detailed usage instructions and analysis of the vulnerability.
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