Bug 1829345 (CVE-2020-6813) - CVE-2020-6813 Mozilla: @import statements in CSS could bypass the Content Security Policy nonce feature
Summary: CVE-2020-6813 Mozilla: @import statements in CSS could bypass the Content Sec...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-6813
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1829324
TreeView+ depends on / blocked
 
Reported: 2020-04-29 12:18 UTC by msiddiqu
Modified: 2021-02-16 20:10 UTC (History)
3 users (show)

Fixed In Version: firefox 74
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Clone Of:
Environment:
Last Closed: 2020-04-29 16:32:09 UTC


Attachments (Terms of Use)

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


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