Firefox ESR: The "Forget about this site" feature in the History pane is intended to remove all saved user data that…
CVE-2019-11747 is fixed in 4 products on 2 platforms, first by firefox 69.0+build2-0ubuntu0.18.04.1, released September 3, 2019. It is not reported as exploited. Patch Radar priority: Routine.
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. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 78.0esr | Mozilla Firefox ESR (en-US) 78.0esr | Jun 25, 2020 |
| Linux | |||
| firefox · RHEL 8 | 0:68.1.0-1.el8_0 | RHSA-2019:2663 | Sep 4, 2019 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 69.0+build2-0ubuntu0.18.04.1 | firefox 69.0+build2-0ubuntu0.18.04.1 | Sep 3, 2019 |
| firefox · ol 8 | 0:68.1.0-1.0.1.el8_0 | ELSA-2019-2663 | Sep 6, 2019 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 69.0+build2-0ubuntu0.18.04.1 | firefox-geckodriver 69.0+build2-0ubuntu0.18.04.1 | Sep 3, 2019 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 69.0+build2-0ubuntu0.18.04.1 | firefox-mozsymbols 69.0+build2-0ubuntu0.18.04.1 | Sep 3, 2019 |
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