CVE-2021-21330
python-aiohttp - security update
Description
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.
How to fix CVE-2021-21330
To remediate CVE-2021-21330, upgrade the affected package to a fixed version below.
- —upgrade to 3.7.4-1 or later
- —upgrade to 3.5.1-1+deb10u1 or later
- —upgrade to 3.7.4 or later
- —upgrade to 2545222a3853e31ace15d87ae0e2effb7da0c96b or later
Is CVE-2021-21330 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 3.7.4-1
- from 0, < 3.5.1-1+deb10u1
- from 0, < 3.7.4
- from 0, < 2545222a3853e31ace15d87ae0e2effb7da0c96b | from 0, < 3.7.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | LOW3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N |