fix(deps): update dependency python-multipart to v0.0.18 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
python-multipart (changelog)	0.0.17 -> 0.0.18

GitHub Vulnerability Alerts

CVE-2024-53981

Summary

When parsing form data, python-multipart skips line breaks (CR \r or LF \n) in front of the first boundary and any tailing bytes after the last boundary. This happens one byte at a time and emits a log event each time, which may cause excessive logging for certain inputs.

An attacker could abuse this by sending a malicious request with lots of data before the first or after the last boundary, causing high CPU load and stalling the processing thread for a significant amount of time. In case of ASGI application, this could stall the event loop and prevent other requests from being processed, resulting in a denial of service (DoS).

Impact

Applications that use python-multipart to parse form data (or use frameworks that do so) are affected.

Original Report

This security issue was reported by:

• GitHub security advisory in Starlette on October 30 by @​Startr4ck
• Email to python-multipart maintainer on October 3 by @​mnqazi

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Release Notes

Kludex/python-multipart (python-multipart)

v0.0.18

Compare Source

• Hard break if found data after last boundary on MultipartParser #​189.

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