Bug 1834687 (CVE-2020-12391) - CVE-2020-12391 Mozilla: Content-Security-Policy bypass using object elements
Summary: CVE-2020-12391 Mozilla: Content-Security-Policy bypass using object elements
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-12391
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1834683
TreeView+ depends on / blocked
 
Reported: 2020-05-12 08:52 UTC by msiddiqu
Modified: 2021-02-16 20:04 UTC (History)
3 users (show)

Fixed In Version: firefox 76
Doc Type: If docs needed, set a value
Doc Text:
The Mozilla Foundation Security Advisory describes this flaw as: Documents formed using `data:` URLs in an `object` element failed to inherit the CSP of the creating context. This allowed the execution of scripts that should have been blocked, albeit with a unique opaque origin.
Clone Of:
Environment:
Last Closed: 2020-05-12 08:57:01 UTC
Embargoed:

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Description msiddiqu 2020-05-12 08:52:09 UTC 
Documents formed using `data:` URLs in an `object` element failed to inherit the CSP of the creating context. This allowed the execution of scripts that should have been blocked, albeit with a unique opaque origin.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2020-16/#CVE-2020-12391
Comment 1 msiddiqu 2020-05-12 08:52:13 UTC 
Acknowledgments:

Name: the Mozilla project
Upstream: Giorgio Maone
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