CVE-2024-24762
Description
FastAPI is a web framework for building APIs with Python 3.8+ based on standard Python type hints. 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. It's a ReDoS(Regular expression Denial of Service), it only applies to those reading form data, using `python-multipart`. This vulnerability has been patched in version 0.109.1.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 0.0.9-1 |
| debian | sid | fixed | 0.0.9-1 |
| debian | trixie | fixed | 0.0.9-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | python-multipart | <0.0.7 | 0.0.7 |
| PyPI | fastapi | <0.109.1 | 0.109.1 |
| PyPI | fastapi | <9d34ad0ee8a0dfbbcce06f76c2d5d851085024fc||<0.109.1 | 9d34ad0ee8a0dfbbcce06f76c2d5d851085024fc |
References
- https://github.com/Kludex/python-multipart/security/advisories/GHSA-2jv5-9r88-3w3p
- https://nvd.nist.gov/vuln/detail/CVE-2024-24762
- https://github.com/github/advisory-database/pull/4829
- https://github.com/Kludex/python-multipart/commit/20f0ef6b4e4caf7d69a667c54dff57fe467109a4
- https://github.com/encode/starlette/commit/13e5c26a27f4903924624736abd6131b2da80cc5
- https://github.com/tiangolo/fastapi/commit/9d34ad0ee8a0dfbbcce06f76c2d5d851085024fc
- https://github.com/Kludex/python-multipart
- https://github.com/andrew-d/python-multipart/blob/d3d16dae4b061c34fe9d3c9081d9800c49fc1f7a/multipart/multipart.py#L72-L74
- https://github.com/pypa/advisory-database/tree/main/vulns/fastapi/PYSEC-2024-38.yaml
- https://github.com/tiangolo/fastapi/releases/tag/0.109.1
- https://github.com/encode/starlette/security/advisories/GHSA-93gm-qmq6-w238
- https://github.com/tiangolo/fastapi/security/advisories/GHSA-qf9m-vfgh-m389
- https://github.com/tiangolo/fastapi
- https://www.suse.com/security/cve/CVE-2024-24762.html
- https://security-tracker.debian.org/tracker/CVE-2024-24762
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.