CVE-2024-0243

Advisory

In versions of Langchain-ai before 0.1.0, a vulnerability exists where a crawler, using a specified configuration, could mistakenly download malicious content from an external site. This occurs when an attacker adds a malicious HTML file on https://example.com that includes links to outside sites, contrary to the crawler's settings intended to restrict such actions.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

With the following crawler configuration: ```python from bs4 import BeautifulSoup as Soup url = "https://example.com" loader = RecursiveUrlLoader( url=url, max_depth=2, extractor=lambda x: Soup(x, "html.parser").text ) docs = loader.load() ``` An attacker in control of the contents of `https://example.com` could place a malicious HTML file in there with links like "https://example.completely.different/my_file.html" and the crawler would proceed to download that file as well even though `prevent_outside=True`. https://github.com/langchain-ai/langchain/blob/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22/libs/community/langchain_community/document_loaders/recursive_url_loader.py#L51-L51 Resolved in https://github.com/langchain-ai/langchain/pull/15559 See CVE-2024-0243.


MISC:https://github.com/langchain-ai/langchain/commit/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22: https://github.com/langchain-ai/langchain/commit/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22
MISC:https://huntr.com/bounties/370904e7-10ac-40a4-a8d4-e2d16e1ca861: https://huntr.com/bounties/370904e7-10ac-40a4-a8d4-e2d16e1ca861

Resources

• https://github.com/langchain-ai/langchain/commit/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22
• https://huntr.com/bounties/370904e7-10ac-40a4-a8d4-e2d16e1ca861
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-0243