Bug 1985315 (CVE-2021-35043)

Summary:	CVE-2021-35043 AntiSamy: XSS via HTML attributes
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	aileenc, chazlett, drieden, ggaughan, gmalinko, janstey, jochrist, jwon
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	antisamy 1.6.4	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in AnitSamy, where it allows a Cross-site Scripting attack (XSS) via HTML attributes when using the HTML output serializer (XHTML is not affected). This issue was demonstrated by a javascript: URL with : as the replacement for the : character. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-07-26 10:46:49 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:
Bug Blocks:	1985316

Description Marian Rehak 2021-07-23 11:18:52 UTC

OWASP AntiSamy before 1.6.4 allows XSS via HTML attributes when using the HTML output serializer (XHTML is not affected). This was demonstrated by a javascript: URL with &#00058 as the replacement for the : character.

Upstream Reference:

https://github.com/nahsra/antisamy/releases/tag/v1.6.4
https://github.com/nahsra/antisamy/pull/87

Comment 2 Jonathan Christison 2021-07-26 10:15:42 UTC

Marking Red Hat JBoss Fuse 6 as having a low impact, this is because although antisamy is present in the offline repository it is not used.

This vulnerability is out of security support scope for the following products:

 * Red Hat JBoss Fuse 6

Please refer to https://access.redhat.com/support/policy/updates/jboss_notes for more details.

Comment 4 Product Security DevOps Team 2021-07-26 10:46:49 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-2021-35043