Arbitrary File Write in open-webui Affects User Data Management

CVE-2024-7034

Summary

In open-webui version 0.3.8, the /models/upload endpoint is susceptible to arbitrary file write due to inadequate management of user-supplied filenames. This flaw results from using an unsanitized input in the file path creation process, specifically file_path = f"{UPLOAD_DIR}/{file.filename}". Attackers can exploit this by inserting directory traversal sequences in the file.filename parameter, allowing them to manipulate the file path, escape the designated UPLOAD_DIR, and overwrite critical system files. Such unauthorized modifications can compromise system binaries, configuration files, and sensitive information, enhancing the risk of remote command execution.

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