Bug 1217684 (CVE-2023-49081)

Summary:	VUL-0: CVE-2023-49081: python-aiohttp: ClientSession is vulnerable to CRLF injection via version
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	John Paul Adrian Glaubitz <adrian.glaubitz>
Status:	IN_PROGRESS ---	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	adrian.glaubitz, gabriele.sonnu, kvanderveer, public-cloud-maintainers, rjschwei, stoyan.manolov
Version:	unspecified	Flags:	stoyan.manolov: needinfo? (adrian.glaubitz)
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/386463/
Whiteboard:	CVSSv3.1:SUSE:CVE-2023-49081:4.0:(AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2023-11-30 08:22:37 UTC

Summary
Improper validation make it possible for an attacker to modify the HTTP request (e.g. to insert a new header) or even create a new HTTP request if the attacker controls the HTTP version.

Details
The vulnerability only occurs if the attacker can control the HTTP version of the request (including its type).
For example if an unvalidated JSON value is used as a version and the attacker is then able to pass an array as the version parameter.
Furthermore, the vulnerability only occurs when the Connection header is passed to the headers parameter.

At this point, the library will use the parsed value to create the request. If a list is passed, then it bypasses validation and it is possible to perform CRLF injection.

PoC
The POC below shows an example of providing an unvalidated array as a version:
https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e

Impact
CRLF injection leading to Request Smuggling.

Workaround
If these specific conditions are met and you are unable to upgrade, then validate the user input to the version parameter to ensure it is a str.

References:
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2

Comment 1 Gabriele Sonnu 2023-11-30 10:08:16 UTC

Tracking as affected:

 - SUSE:SLE-15-SP1:Update/python-aiohttp
 - SUSE:SLE-15-SP4:Update/python-aiohttp
 - SUSE:ALP:Source:Standard:1.0/python-aiohttp

Upstream fix:

https://github.com/aio-libs/aiohttp/pull/7835

Comment 5 Maintenance Automation 2024-01-05 12:30:04 UTC

SUSE-SU-2024:0034-1: An update that solves one vulnerability can now be installed.

Category: security (moderate)
Bug References: 1217684
CVE References: CVE-2023-49081
Sources used:
openSUSE Leap 15.5 (src): python-aiohttp-3.6.0-150100.3.15.1
Public Cloud Module 15-SP1 (src): python-aiohttp-3.6.0-150100.3.15.1
Public Cloud Module 15-SP2 (src): python-aiohttp-3.6.0-150100.3.15.1
Public Cloud Module 15-SP3 (src): python-aiohttp-3.6.0-150100.3.15.1
Public Cloud Module 15-SP4 (src): python-aiohttp-3.6.0-150100.3.15.1
Public Cloud Module 15-SP5 (src): python-aiohttp-3.6.0-150100.3.15.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 6 Maintenance Automation 2024-01-05 12:30:06 UTC

SUSE-SU-2024:0033-1: An update that solves one vulnerability can now be installed.

Category: security (moderate)
Bug References: 1217684
CVE References: CVE-2023-49081
Sources used:
openSUSE Leap 15.5 (src): python-aiohttp-3.8.5-150400.10.8.1
Python 3 Module 15-SP5 (src): python-aiohttp-3.8.5-150400.10.8.1
openSUSE Leap 15.4 (src): python-aiohttp-3.8.5-150400.10.8.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 7 Robert Schweikert 2024-01-05 12:49:19 UTC

Back to the security team appears to be released