Origin Validation Error Affecting firefox package, versions <66.0+build3-0ubuntu0.16.04.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1604-FIREFOX-341129
- published20 Mar 2019
- disclosed26 Apr 2019
Introduced: 20 Mar 2019
CVE-2019-9803 (opens in a new tab)How to fix?
Upgrade Ubuntu:16.04 firefox to version 66.0+build3-0ubuntu0.16.04.2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Ubuntu.
See How to fix? for Ubuntu:16.04 relevant fixed versions and status.
The Upgrade-Insecure-Requests (UIR) specification states that if UIR is enabled through Content Security Policy (CSP), navigation to a same-origin URL must be upgraded to HTTPS. Firefox will incorrectly navigate to an HTTP URL rather than perform the security upgrade requested by the CSP in some circumstances, allowing for potential man-in-the-middle attacks on the linked resources. This vulnerability affects Firefox < 66.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2019-9803
- https://security-tracker.debian.org/tracker/CVE-2019-9803
- https://w3c.github.io/webappsec-upgrade-insecure-requests/
- https://www.mozilla.org/security/advisories/mfsa2019-07/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1437009
- https://bugzilla.mozilla.org/show_bug.cgi?id=1515863