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Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVE-2024-47164

Medium
6.5/10

Summary

Gradio is an open-source Python package designed for quick prototyping. This vulnerability relates to the bypass of directory traversal checks within the "is_in_or_equal" function. This function, intended to check if a file resides within a given directory, can be bypassed with certain payloads that manipulate file paths using `..` (parent directory) sequences. Attackers could potentially access restricted files if they are able to exploit this flaw, although the difficulty is high. This primarily affects users relying on Gradio's blocklist or directory access validation, particularly when handling file uploads. This vulnerability affects gradio package versions prior to 4.41.0. Users are advised to upgrade to a fixed version or later to address this issue. As a workaround, users can manually sanitize and normalize file paths in their Gradio deployment before passing them to the "is_in_or_equal" function. Ensuring that all file paths are properly resolved and absolute can help mitigate the bypass vulnerabilities caused by the improper handling of ".." sequences or malformed paths.

  • LOW
  • NETWORK
  • LOW
  • UNCHANGED
  • NONE
  • NONE
  • LOW
  • NONE

CWE-22 - Path Traversal

Path traversal (or directory traversal), is a vulnerability that allows malicious users to traverse the server's root directory, gaining access to arbitrary files and folders such as application code & data, back-end credentials, and sensitive operating system files. In the worst-case scenario, an attacker could potentially execute arbitrary files on the server, resulting in a denial of service attack. Such an exploit may severely impact the integrity, confidentiality, and availability of an application.

References

Advisory Timeline

  • Published