CVE-2020-12391
First published: Tue May 05 2020(Updated: )
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. This vulnerability affects Firefox < 76.
Credit: security@mozilla.org security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Firefox | <76 | 76 |
| Mozilla Firefox | <76.0 | |
| ubuntu/firefox | <76.0+ | 76.0+ |
| ubuntu/firefox | <76.0+ | 76.0+ |
| ubuntu/firefox | <76.0+ | 76.0+ |
| ubuntu/firefox | <76.0+ | 76.0+ |
| ubuntu/firefox | <76.0+ | 76.0+ |
| ubuntu/firefox | <76.0+ | 76.0+ |
| ubuntu/firefox | <76.0+ | 76.0+ |
| ubuntu/firefox | <76.0+ | 76.0+ |
| ubuntu/firefox | <76.0+ | 76.0+ |
| ubuntu/firefox | <76.0+ | 76.0+ |
| ubuntu/firefox | <76.0+ | 76.0+ |
| ubuntu/firefox | <76.0 | 76.0 |
| ubuntu/firefox | <76.0+ | 76.0+ |
| debian/firefox | 130.0-2 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1457100
- https://www.mozilla.org/security/advisories/mfsa2020-16/
- https://launchpad.net/bugs/cve/CVE-2020-12391
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-16/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-16/#CVE-2020-6831
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-16/#CVE-2020-12391
- https://security-tracker.debian.org/tracker/CVE-2020-12391
- https://ubuntu.com/security/notices/USN-4353-1
- https://www.cve.org/CVERecord?id=CVE-2020-12391
- https://nvd.nist.gov/vuln/detail/CVE-2020-12391
- https://ubuntu.com/security/CVE-2020-12391
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2020-12391?
CVE-2020-12391 is classified as a moderate severity vulnerability.
How do I fix CVE-2020-12391?
To fix CVE-2020-12391, users should update to Mozilla Firefox version 76 or later.
What versions of Firefox are affected by CVE-2020-12391?
CVE-2020-12391 affects all versions of Mozilla Firefox prior to version 76.
What is the impact of CVE-2020-12391?
CVE-2020-12391 allows execution of blocked scripts through data: URLs in an OBJECT element.
Does CVE-2020-12391 affect other browsers apart from Firefox?
CVE-2020-12391 specifically affects Firefox and is not reported to impact other major browsers.
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