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CVE-2024-47874— Starlette Denial of service (DoS) via multipart/form-data

Quick assessment

Affected
encode starlette
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Starlette是Encode开源的一个轻量级的 ASGI 框架/工具包。非常适合用 Python 构建异步 web 服务。 Starlette 0.40.0版本之前存在安全漏洞，该漏洞源于没有针对用户。

AI Predicted 7.5 Difficulty: Easy EPSS 0.65% · P50

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2024-47874

Vulnerability Information
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Vulnerability Title
Starlette Denial of service (DoS) via multipart/form-data
Source: CVE Program / CVE List V5
Vulnerability Description
Starlette is an Asynchronous Server Gateway Interface (ASGI) framework/toolkit. Prior to version 0.40.0, Starlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette. This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests. Verison 0.40.0 fixes this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Starlette 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Starlette是Encode开源的一个轻量级的 ASGI 框架/工具包。非常适合用 Python 构建异步 web 服务。 Starlette 0.40.0版本之前存在安全漏洞，该漏洞源于没有针对用户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
encode starlette < 0.40.0 -

II. Public POCs for CVE-2024-47874

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III. Intelligence Information for CVE-2024-47874

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Vendor Advisories for CVE-2024-47874 (1)

IV. Related Vulnerabilities

Same product: starlette
Same vendor: encode
Same weakness: CWE-770

V. Comments for CVE-2024-47874

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