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Miggo AIRoot Cause AnalysisThe vulnerability exists in the Docker API of Crawl4AI, where multiple endpoints (/execute_js, /screenshot, /pdf, and /html) were found to be vulnerable to Local File Inclusion (LFI). The root cause of the vulnerability was the lack of input validation on the url parameter provided to these endpoints. An attacker could provide a file:// URL to access and read arbitrary files from the server's filesystem. The patch for this vulnerability, found in commit f24396c23e120a9eaa67323e9f83fa3b900d6466, introduces a validate_url_scheme function. This function is now called at the beginning of each of the vulnerable endpoint handlers (generate_html, generate_screenshot, generate_pdf, and execute_js) to ensure that the provided URL uses an allowed scheme (HTTP, HTTPS, or raw: for specific cases). This fix effectively prevents the LFI vulnerability by blocking file:// and other potentially dangerous URL schemes.
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| crawl4ai | pip | < 0.8.0 | 0.8.0 |
