Bug 2257340 (CVE-2024-21647)

Summary:	CVE-2024-21647 rubygem-puma: HTTP request smuggling when parsing chunked Transfer-Encoding Bodies
Product:	[Other] Security Response	Reporter:	Marco Benatto <mbenatto>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	bbuckingham, bcourt, ehelms, jsherril, lzap, mhulan, nmoumoul, orabin, pcreech, rchan
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	puma 6.4.2, puma 5.6.8	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in Puma rubygem. Versions prior 6.4.2 are susceptible to a HTTP smuggling attack when parsing chunked transfer encoding bodies on HTTP messages, which don't limit the size of the message chunk extensions. This issue may lead to uncontrolled resource consumption, possibly resulting in a denial of service of the attacked server.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2257341, 2257342, 2257343, 2257344
Bug Blocks:	2257339

Description Marco Benatto 2024-01-08 22:09:40 UTC

Puma is a web server for Ruby/Rack applications built for parallelism. Prior to version 6.4.2, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies in a way that allowed HTTP request smuggling. Fixed versions limits the size of chunk extensions. Without this limit, an attacker could cause unbounded resource (CPU, network bandwidth) consumption. This vulnerability has been fixed in versions 6.4.2 and 5.6.8.

https://github.com/puma/puma/commit/5fc43d73b6ff193325e657a24ed76dec79133e93
https://github.com/puma/puma/security/advisories/GHSA-c2f4-cvqm-65w2

Comment 1 Marco Benatto 2024-01-08 22:10:00 UTC

Created rubygem-puma tracking bugs for this issue:

Affects: fedora-all [bug 2257341]

Comment 4 errata-xmlrpc 2024-04-23 17:17:00 UTC

This issue has been addressed in the following products:

  Red Hat Satellite 6.15 for RHEL 8

Via RHSA-2024:2010 https://access.redhat.com/errata/RHSA-2024:2010