CVE-2023-47641 – aiohttp

Package

Manager: pip
Name: aiohttp
Vulnerable Version: >=0 <3.8.0

Severity

Level: Low

CVSS v3.1: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

EPSS: 0.00139 pctl0.34554

Details

Aiohttp has inconsistent interpretation of `Content-Length` vs. `Transfer-Encoding` differing in C and Python fallbacks ### Impact Aiohttp has a security vulnerability regarding the inconsistent interpretation of the http protocol. As we know that HTTP/1.1 is persistent, if we have both Content-Length(CL) and Transfer-Encoding(TE) it can lead to incorrect interpretation of two entities that parse the HTTP and we can poison other sockets with this incorrect interpretation. A possible Proof-of-Concept (POC) would be a configuration with a reverse proxy(frontend) that accepts both CL and TE headers and aiohttp as backend. As aiohttp parses anything with chunked, we can pass a chunked123 as TE, the frontend entity will ignore this header and will parse Content-Length. I can give a Dockerfile with the configuration if you want. The impact of this vulnerability is that it is possible to bypass any proxy rule, poisoning sockets to other users like passing Authentication Headers, also if it is present an Open Redirect (just like CVE-2021-21330) we can combine it to redirect random users to our website and log the request. ### References - https://github.com/aio-libs/aiohttp/commit/f016f0680e4ace6742b03a70cb0382ce86abe371

Metadata

Created: 2023-11-14T20:36:25Z
Modified: 2024-09-04T20:00:52Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/11/GHSA-xx9p-xxvh-7g8j/GHSA-xx9p-xxvh-7g8j.json
CWE IDs: ["CWE-444"]
Alternative ID: GHSA-xx9p-xxvh-7g8j
Finding: F110
Auto approve: 1