Bug 1925151 (CVE-2021-21610)

Summary:	CVE-2021-21610 jenkins: Reflected XSS vulnerability in markup formatter preview
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	abenaiss, aileenc, aos-bugs, bmontgom, chazlett, dramseur, drieden, eparis, ggaughan, gmalinko, janstey, jburrell, jhunter, jochrist, jokerman, jwon, kmitts, mgala, mjudeiki, nstielau, pbhattac, sponnaga, vbobade
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	jenkins 2.275, jenkins LTS 2.263.2	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in jenkins. A cross-site scripting (XSS) vulnerability is possible due to the lack of restrictions in URL rendering in the formatted previews of markup passed as a query parameter if the configured markup formatter does not prohibit unsafe elements in the markup. The highest threat from this vulnerability is to data confidentiality and integrity.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-02-18 19:02:33 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:	1925482, 1925483, 1925484, 1925485, 1925486, 1929919, 1929921
Bug Blocks:	1925147

Description Michael Kaplan 2021-02-04 13:52:42 UTC

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not implement any restrictions for the URL rendering a formatted preview of markup passed as a query parameter, resulting in a reflected cross-site scripting (XSS) vulnerability if the configured markup formatter does not prohibit unsafe elements (JavaScript) in markup.

Comment 3 errata-xmlrpc 2021-02-17 19:04:56 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.6

Via RHSA-2021:0423 https://access.redhat.com/errata/RHSA-2021:0423

Comment 4 Product Security DevOps Team 2021-02-18 19:02:33 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-2021-21610

Comment 5 errata-xmlrpc 2021-03-03 04:17:55 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.5

Via RHSA-2021:0429 https://access.redhat.com/errata/RHSA-2021:0429