python-multipart vulnerable to content-type header Regular expression Denial of Service
Vulnerability Description
`python-multipart` is a streaming multipart parser for Python. When using form data, `python-multipart` uses a Regular Expression to parse the HTTP `Content-Type` header, including options. An attacker could send a custom-made `Content-Type` option that is very difficult for the RegEx to process, consuming CPU resources and stalling indefinitely (minutes or more) while holding the main event loop. This means that process can't handle any more requests, leading to regular expression denial of service. This vulnerability has been patched in version 0.0.7.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/Kludex/python-multipart/security/advisories/GHSA-2jv5-9r88-3w3p
- https://github.com/Kludex/python-multipart/commit/20f0ef6b4e4caf7d69a667c54dff57fe467109a4
- https://github.com/tiangolo/fastapi/security/advisories/GHSA-qf9m-vfgh-m389
- https://github.com/encode/starlette/security/advisories/GHSA-93gm-qmq6-w238
- https://github.com/andrew-d/python-multipart/blob/d3d16dae4b061c34fe9d3c9081d9800c49fc1f7a/multipart/multipart.py#L72-L74
- https://github.com/encode/starlette/commit/13e5c26a27f4903924624736abd6131b2da80cc5
- https://github.com/tiangolo/fastapi/commit/9d34ad0ee8a0dfbbcce06f76c2d5d851085024fc
- https://github.com/tiangolo/fastapi/releases/tag/0.109.1
Affected Vendor
Kludex
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