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CVE-2021-21330

Published: 26 February 2021

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In aiohttp before version 3.7.4 there is an open redirect vulnerability. A maliciously crafted link to an aiohttp-based web-server could redirect the browser to a different website. It is caused by a bug in the `aiohttp.web_middlewares.normalize_path_middleware` middleware. This security problem has been fixed in 3.7.4. Upgrade your dependency using pip as follows "pip install aiohttp >= 3.7.4". If upgrading is not an option for you, a workaround can be to avoid using `aiohttp.web_middlewares.normalize_path_middleware` in your applications.

Notes

AuthorNote
sbeattie
vuln introduced in upstream commit
8c44b2189d24c1c9f94d6733b5038761451fb3bc (v1.3.0)

Priority

Medium

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package Release Status
python-aiohttp
Launchpad, Ubuntu, Debian
jammy Not vulnerable
(3.7.4-1)
lunar Not vulnerable
(3.7.4-1)
impish Not vulnerable
(3.7.4-1)
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
trusty Does not exist

upstream
Released (3.7.4-1)
xenial Not vulnerable
(code not present)
kinetic Not vulnerable
(3.7.4-1)
bionic
Released (3.0.1-1ubuntu0.1~esm1)
Available with Ubuntu Pro
focal
Released (3.6.2-1ubuntu1+esm1)
Available with Ubuntu Pro
mantic Not vulnerable
(3.7.4-1)
Patches:
upstream: https://github.com/aio-libs/aiohttp/commit/2545222a3853e31ace15d87ae0e2effb7da0c96b

Severity score breakdown

Parameter Value
Base score 6.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N