Resource exhaustion in Encode Starlette
CVE-2024-24762
`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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.015 (74.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: +0.000
Affected products
- Encode Starlette — versions 0
- Fastapiexpert Python-Multipart
- Kludex Python-Multipart — versions 0
- Tiangolo Fastapi — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/Kludex/python-multipart/security/advisories/GHSA-2jv5-9r88-3w3p (Exploit, Vendor Advisory)
- github.com/Kludex/python-multipart/commit/20f0ef6b4e4caf7d69a667c54dff57fe46710… (Patch)
- github.com/tiangolo/fastapi/security/advisories/GHSA-qf9m-vfgh-m389 (Broken Link)
- github.com/encode/starlette/security/advisories/GHSA-93gm-qmq6-w238 (Broken Link)
- github.com/andrew-d/python-multipart/blob/d3d16dae4b061c34fe9d3c9081d9800c49fc1… (Product)
- github.com/encode/starlette/commit/13e5c26a27f4903924624736abd6131b2da80cc5 (Patch)
- github.com/tiangolo/fastapi/commit/9d34ad0ee8a0dfbbcce06f76c2d5d851085024fc (Patch)
- github.com/tiangolo/fastapi/releases/tag/0.109.1 (Product)
Frequently asked questions
- What is CVE-2024-24762?
- CVE-2024-24762 is a high-severity vulnerability in Encode Starlette, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2024-02-05.
- How severe is CVE-2024-24762?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2024-24762 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.