CVE-2019-9803
First published: Tue Mar 19 2019(Updated: )
Last updated 24 July 2024
Credit: security@mozilla.org security@mozilla.org security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Firefox | <66 | 66 |
| Mozilla Firefox | <66.0 | |
| debian/firefox | 133.0.3-1 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1437009
- https://bugzilla.mozilla.org/show_bug.cgi?id=1515863
- https://w3c.github.io/webappsec-upgrade-insecure-requests/
- https://www.mozilla.org/security/advisories/mfsa2019-07/
- https://launchpad.net/bugs/cve/CVE-2019-9803
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/#CVE-2019-9788
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/#CVE-2019-9803
- https://security-tracker.debian.org/tracker/CVE-2019-9803
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9803
- https://nvd.nist.gov/vuln/detail/CVE-2019-9803
- https://ubuntu.com/security/CVE-2019-9803
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2019-9803?
CVE-2019-9803 is a vulnerability in the Upgrade-Insecure-Requests (UIR) specification that affects Mozilla Firefox.
What is the severity level of CVE-2019-9803?
The severity level of CVE-2019-9803 is high, with a CVSS score of 7.4.
How does CVE-2019-9803 affect Firefox?
CVE-2019-9803 affects Firefox by causing navigation to an HTTP URL instead of performing the requested security upgrade when the Upgrade-Insecure-Requests (UIR) is enabled through Content Security Policy (CSP).
How can I fix CVE-2019-9803 in Firefox?
To fix CVE-2019-9803 in Firefox, update to version 66.0 or later.
Where can I find more information about CVE-2019-9803?
You can find more information about CVE-2019-9803 on the Mozilla Bugzilla website and the W3C Upgrade-Insecure-Requests specification.
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