Bug 817893 (CVE-2021-41136)

Summary:	<www-servers/puma-5.5.2: request smuggling with Apache Airflow (CVE-2021-41136)
Product:	Gentoo Security	Reporter:	John Helmert III <ajak>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	minor	CC:	ruby
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://github.com/puma/puma/security/advisories/GHSA-48w2-rm65-62xx
Whiteboard:	C3 [glsa+]
Package list:		Runtime testing required:	---
Bug Depends on:	821892
Bug Blocks:

Description John Helmert III archtester

2021-10-12 19:35:48 UTC

CVE-2021-41136:

Puma is a HTTP 1.1 server for Ruby/Rack applications. Prior to versions 5.5.1 and 4.3.9, using `puma` with a proxy which forwards HTTP header values which contain the LF character could allow HTTP request smugggling. A client could smuggle a request through a proxy, causing the proxy to send a response back to another unknown client. The only proxy which has this behavior, as far as the Puma team is aware of, is Apache Traffic Server. If the proxy uses persistent connections and the client adds another request in via HTTP pipelining, the proxy may mistake it as the first request's body. Puma, however, would see it as two requests, and when processing the second request, send back a response that the proxy does not expect. If the proxy has reused the persistent connection to Puma to send another request for a different client, the second response from the first client will be sent to the second client. This vulnerability was patched in Puma 5.5.1 and 4.3.9. As a workaround, do not use Apache Traffic Server with `puma`.

Fix in 5.5.1, please bump.

Comment 1 Hans de Graaff gentoo-dev

2022-02-12 07:24:58 UTC

Puma 5.5.2 has been added and marked stable.

Comment 2 John Helmert III archtester

2022-08-14 05:05:17 UTC

GLSA request filed

Comment 3 Larry the Git Cow gentoo-dev

2022-08-14 21:43:36 UTC

The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/data/glsa.git/commit/?id=74f54f14d9074878f0b2b711ab3064799b15e9cb

commit 74f54f14d9074878f0b2b711ab3064799b15e9cb
Author:     GLSAMaker <glsamaker@gentoo.org>
AuthorDate: 2022-08-14 21:41:58 +0000
Commit:     Sam James <sam@gentoo.org>
CommitDate: 2022-08-14 21:43:20 +0000

    [ GLSA 202208-28 ] Puma: Multiple Vulnerabilities
    
    Bug: https://bugs.gentoo.org/794034
    Bug: https://bugs.gentoo.org/817893
    Bug: https://bugs.gentoo.org/833155
    Bug: https://bugs.gentoo.org/836431
    Signed-off-by: GLSAMaker <glsamaker@gentoo.org>
    Signed-off-by: Sam James <sam@gentoo.org>

 glsa-202208-28.xml | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

Comment 4 Sam James archtester

2022-08-14 21:44:03 UTC

GLSA done, all done.