Uncontrolled Resource Consumption in mintplex-labs/anything-llm

Vulnerability Description

An uncontrolled resource consumption vulnerability exists in the `upload-link` endpoint of mintplex-labs/anything-llm. This vulnerability allows attackers to cause a denial of service (DOS) by shutting down the server through sending invalid upload requests. Specifically, the server can be made to shut down by sending an empty body with a 'Content-Length: 0' header or by sending a body with arbitrary content, such as 'asdasdasd', with a 'Content-Length: 9' header. The vulnerability is reproducible by users with at least a 'Manager' role, sending a crafted request to any workspace. This issue indicates that a previous fix was not effective in mitigating the vulnerability.

References

• https://huntr.com/bounties/6c8bdfa1-ec56-4b02-bde9-cfc27470e6ca
• https://github.com/mintplex-labs/anything-llm/commit/e2439c6d4c3cfdacd96cd1b7b92d1f89c3cc8459