Bug 1930211 (CVE-2021-22881)

Summary:	CVE-2021-22881 rubygem-actionpack: open redirect vulnerability may lead to confidentiality and integrity compromise
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	akarol, bbuckingham, bcourt, bkearney, btotty, dmetzger, gmccullo, gtanzill, hhudgeon, jaruga, jfrey, jhardy, lzap, mmccune, mo, nmoumoul, obarenbo, pcreech, pvalena, rchan, rjerrido, roliveri, ruby-packagers-sig, simaishi, smallamp, sokeeffe, sseago, strzibny, vondruch
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	rubygem-actionpack 6.1.2.1, rubygem-actionpack 6.0.3.5	Doc Type:	If docs needed, set a value
Doc Text:	The Host Authorization middleware in Action Pack suffers from an open redirect vulnerability. Specially crafted `Host` headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. Impacted applications will have allowed hosts with a leading dot. When an allowed host contains a leading dot, a specially crafted `Host` header can be used to redirect to a malicious website.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-02-22 13:02:07 UTC	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:	1930212, 1931318
Bug Blocks:	1930213

Description Marian Rehak 2021-02-18 14:10:33 UTC

The Host Authorization middleware in Action Pack before 6.1.2.1, 6.0.3.5 suffers from an open redirect vulnerability. Specially crafted `Host` headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. Impacted applications will have allowed hosts with a leading dot. When an allowed host contains a leading dot, a specially crafted `Host` header can be used to redirect to a malicious website.

References:

https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130

Comment 1 Marian Rehak 2021-02-18 14:10:58 UTC

Created rubygem-actionpack tracking bugs for this issue:

Affects: fedora-all [bug 1930212]

Comment 3 Yadnyawalk Tale 2021-02-22 06:52:02 UTC

Statement:

Red Hat Satellite does not make use of the config.hosts setting and is not affected by this CVE.

Comment 5 Yadnyawalk Tale 2021-02-22 11:49:49 UTC

Hackerone's report: https://hackerone.com/reports/1047447

Comment 6 Yadnyawalk Tale 2021-02-22 11:51:47 UTC

Upstream patches: 

6-1-stable: https://github.com/rails/rails/commit/b5de7b3a4787d8a55aaad39f477c16e3af65e444
6-0-stable: https://github.com/rails/rails/commit/e33092740b3cc05f5abee197a5982eac31947e92

Comment 7 Yadnyawalk Tale 2021-02-22 11:51:54 UTC

External References:

https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130

Comment 8 Product Security DevOps Team 2021-02-22 13:02:07 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-22881