Descriptionaiohttp 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1070364

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python-aiohttp (PTS)buster, buster (security)3.5.1-1+deb10u1vulnerable
sid, trixie3.9.1-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[buster] - python-aiohttp <postponed> (Minor issue)
Fixed by: (v3.9.4)
Followup: (v3.9.5)
Followup: (v3.9.5)

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