Bug 2250179 (CVE-2023-47641) - CVE-2023-47641 python-aiohttp: inconsistent interpretation of `Content-Length` vs. `Transfer-Encoding`
Summary: CVE-2023-47641 python-aiohttp: inconsistent interpretation of `Content-Length...
Keywords:
Status: NEW
Alias: CVE-2023-47641
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2250180
Blocks: 2250178
TreeView+ depends on / blocked
 
Reported: 2023-11-16 20:30 UTC by Robb Gatica
Modified: 2025-04-01 08:28 UTC (History)
55 users (show)

Fixed In Version: aiohttp 3.8.0
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description Robb Gatica 2023-11-16 20:30:47 UTC
aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Affected versions of aiohttp have a security vulnerability regarding the inconsistent interpretation of the http protocol. HTTP/1.1 is a persistent protocol, if both Content-Length(CL) and Transfer-Encoding(TE) header values are present 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. 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 an attacker could combine it to redirect random users to another website and log the request. This vulnerability has been addressed in release 3.8.0 of aiohttp. Users are advised to upgrade. There are no known workarounds for this vulnerability.

https://github.com/aio-libs/aiohttp/commit/f016f0680e4ace6742b03a70cb0382ce86abe371
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-xx9p-xxvh-7g8j

Comment 1 Robb Gatica 2023-11-16 20:31:36 UTC
griffon --profile triage service products-contain-component aiohttp                                   
ansible_automation_platform-2 python-aiohttp
ansible_automation_platform-2 python3x-aiohttp
rhn_satellite_6 python-aiohttp
rhn_satellite_6 python-aiohttp-socks
rhn_satellite_6 python-aiohttp-xmlrpc
rhn_satellite_6 tfm-pulpcore-python-aiohttp
rhn_satellite_6 tfm-pulpcore-python-aiohttp-xmlrpc
rhui-4 python-aiohttp
rhui-4 python-aiohttp-xmlrpc


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