Bugzilla – Bug 1149301
VUL-1: CVE-2019-11747: MozillaFirefox: 'Forget about this site' removes sites from pre-loaded HSTS list
Last modified: 2020-02-04 14:42:14 UTC
CVE-2019-11747: 'Forget about this site' removes sites from pre-loaded HSTS list Reporter Thomas Henlich Impact low Description The "Forget about this site" feature in the History pane is intended to remove all saved user data that indicates a user has visited a site. This includes removing any HTTP Strict Transport Security (HSTS) settings received from sites that use it. Due to a bug, sites on the pre-load list also have their HSTS setting removed. On the next visit to that site if the user specifies an http: URL rather than secure https: they will not be protected by the pre-loaded HSTS setting. After that visit the site's HSTS setting will be restored. References: https://www.mozilla.org/en-US/security/advisories/mfsa2019-26/#CVE-2019-11747 https://bugzilla.mozilla.org/show_bug.cgi?id=1564481 https://bugzilla.redhat.com/show_bug.cgi?id=1748664 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-11747
Closing