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CVE-2024-30251— Denial of service when trying to parse malformed POST requests in aiohttp

Quick assessment

Affected
aio-libs aiohttp
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

aiohttp是一个开源的用于 asyncio 和 Python 的异步 HTTP 客户端/服务器框架。 aiohttp 3.9.4之前版本存在安全漏洞，该漏洞源于尝试解析格式错误的POST请求时会导致决绝服务。

CVSS 7.5 · High EPSS 1.09% · P64
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I. Basic Information for CVE-2024-30251

Vulnerability Information
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Vulnerability Title
Denial of service when trying to parse malformed POST requests in aiohttp
Source: CVE Program / CVE List V5
Vulnerability Description
aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In affected versions an attacker can send a specially crafted POST (multipart/form-data) request. When the aiohttp server processes it, the server will enter an infinite loop and be unable to process any further requests. An attacker can stop the application from serving requests after sending a single request. This issue has been addressed in version 3.9.4. Users are advised to upgrade. Users unable to upgrade may manually apply a patch to their systems. Please see the linked GHSA for instructions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5
Vulnerability Title
aiohttp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
aiohttp是一个开源的用于 asyncio 和 Python 的异步 HTTP 客户端/服务器框架。 aiohttp 3.9.4之前版本存在安全漏洞，该漏洞源于尝试解析格式错误的POST请求时会导致决绝服务。
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
aio-libs aiohttp < 3.9.4 -

II. Public POCs for CVE-2024-30251

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 7553 chars
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III. Intelligence Information for CVE-2024-30251

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Patches & Fixes for CVE-2024-30251 (3)

Vendor Advisories for CVE-2024-30251 (1)

Mailing List Discussions for CVE-2024-30251 (1)

IV. Related Vulnerabilities

Same product: aiohttp
Same vendor: aio-libs
Same weakness: CWE-835

V. Comments for CVE-2024-30251

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