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Ubuntu: (Multiple Advisories) (CVE-2019-9803): Firefox regressions

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Ubuntu: (Multiple Advisories) (CVE-2019-9803): Firefox regressions

Severity
6
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:N)
Published
03/19/2019
Created
04/22/2019
Added
04/01/2019
Modified
01/20/2021

Description

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.

Solution(s)

  • ubuntu-upgrade-firefox

References

  • USN-3918-1
  • USN-3918-2
  • USN-3918-3
  • USN-3918-4
  • CVE-2019-9803

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