Bug 2224185 (CVE-2023-37276)

Summary:	CVE-2023-37276 python-aiohttp: HTTP request smuggling via llhttp HTTP request parser
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	adudiak, bbuckingham, bcourt, davidn, dhughes, eglynn, ehelms, epacific, gtanzill, jcammara, jhardy, jjoyce, jkoehler, jneedle, jobarker, jsherril, kshier, lhh, lzap, mabashia, mburns, mgarciac, mhulan, mminar, myarboro, nmoumoul, orabin, osapryki, pcreech, pgrist, rbiba, rchan, simaishi, smcdonal, sskracic, stcannon, teagle, tfister, yguenane, zsadeh
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	aiohttp 3.8.5	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in aio-libs aiohttp, where it is vulnerable to HTTP request smuggling, caused by a flaw in the aiohttp.web.Application. By sending a specially crafted HTTP(S) request, an attacker can poison the web cache, bypass web application firewall protection, and conduct Cross-site scripting (XSS) attacks.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2224226, 2224228, 2224227
Bug Blocks:	2224192

Description Marian Rehak 2023-07-20 07:04:05 UTC

This vulnerability only affects users of aiohttp as an HTTP server (ie `aiohttp.Application`), you are not affected by this vulnerability if you are using aiohttp as an HTTP client library (ie `aiohttp.ClientSession`). Sending a crafted HTTP request will cause the server to misinterpret one of the HTTP header values leading to HTTP request smuggling. This issue has been addressed in version 3.8.5. Users are advised to upgrade. Users unable to upgrade can reinstall aiohttp using `AIOHTTP_NO_EXTENSIONS=1` as an environment variable to disable the llhttp HTTP request parser implementation. The pure Python implementation isn't vulnerable.

Reference:

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-45c4-8wx5-qw6w