Bug 1829345 (CVE-2020-6813)

Summary:	CVE-2020-6813 Mozilla: @import statements in CSS could bypass the Content Security Policy nonce feature
Product:	[Other] Security Response	Reporter:	msiddiqu
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	jhorak, security-response-team, stransky
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	firefox 74	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-29 16:32:09 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:	1829324

Description msiddiqu 2020-04-29 12:18:31 UTC

When protecting CSS blocks with the nonce feature of Content Security Policy, the @import statement in the CSS block could allow an attacker to inject arbitrary styles, bypassing the intent of the Content Security Policy.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6813

Comment 1 msiddiqu 2020-04-29 12:18:35 UTC

Acknowledgments:

Name: the Mozilla project
Upstream: Matheus Vrech

Comment 2 Product Security DevOps Team 2020-04-29 16:32:09 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-2020-6813