# CVE-2019-11743: Firefox ESR: Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification…

CVE-2019-11743 is fixed in 11 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.

- Web page: https://patchblox.com/security/cve/CVE-2019-11743
- Priority: Routine
- CVSS: 3.7 (Important)
- EPSS: 0.0180
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 3, 2019
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2019-11743

## Description

Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload event, which restricts access to detailed timing attributes to only be same-origin. This resulted in potential cross-origin information exposure of history through timing side-channel attacks. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Mozilla Firefox ESR (en-US) | 78.0esr | [Mozilla Firefox ESR (en-US) 78.0esr](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.esr-78.0esr.md) | Jun 25, 2020 |
| Linux | firefox RHEL 8 | 0:68.1.0-1.el8_0 | [RHSA-2019:2663](https://patchblox.com/security/data/fix/linux/rhsa-2019-2663.md) | Sep 4, 2019 |
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 69.0+build2-0ubuntu0.18.04.1 | [firefox 69.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-69.0-build2-0ubuntu0.18.04.1.md) | Sep 3, 2019 |
| Linux | firefox ol 8 | 0:68.1.0-1.0.1.el8_0 | [ELSA-2019-2663](https://patchblox.com/security/data/fix/linux/elsa-2019-2663.md) | Sep 6, 2019 |
| Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 69.0+build2-0ubuntu0.18.04.1 | [firefox-geckodriver 69.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-69.0-build2-0ubuntu0.18.04.1.md) | Sep 3, 2019 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 69.0+build2-0ubuntu0.18.04.1 | [firefox-mozsymbols 69.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-69.0-build2-0ubuntu0.18.04.1.md) | Sep 3, 2019 |
| Linux | thunderbird RHEL 8 | 0:60.9.0-2.el8_0 | [RHSA-2019:2774](https://patchblox.com/security/data/fix/linux/rhsa-2019-2774.md) | Sep 16, 2019 |
| Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [thunderbird 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | thunderbird ol 8 | 0:60.9.0-2.0.1.el8_0 | [ELSA-2019-2774](https://patchblox.com/security/data/fix/linux/elsa-2019-2774.md) | Sep 17, 2019 |
| Linux | thunderbird-globalmenu Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [thunderbird-globalmenu 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-globalmenu-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [thunderbird-gnome-support 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [thunderbird-mozsymbols 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [xul-ext-calendar-timezones 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [xul-ext-gdata-provider 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [xul-ext-lightning 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |

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