CVE-2024-30251

Denial of service when trying to parse malformed POST requests in aiohttp

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.29%
Affected: aio-libs aiohttp
Published at:
Updated at:

References

Link Tags
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-5m98-qgg9-wh84
https://github.com/aio-libs/aiohttp/commit/7eecdff163ccf029fbb1ddc9de4169d4aaeb6597
https://github.com/aio-libs/aiohttp/commit/cebe526b9c34dc3a3da9140409db63014bc4cf19
https://github.com/aio-libs/aiohttp/commit/f21c6f2ca512a026ce7f0f6c6311f62d6a638866
http://www.openwall.com/lists/oss-security/2024/05/02/4

Frequently Asked Questions

What is the severity of CVE-2024-30251?
CVE-2024-30251 has been scored as a high severity vulnerability.
How to fix CVE-2024-30251?
To fix CVE-2024-30251, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-30251 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-30251 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-30251?
CVE-2024-30251 affects aio-libs aiohttp.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.