Firefox ESR: When following the value's prototype chain, it was possible to retain a reference to a locale, delete…
CVE-2019-11757 is fixed in 10 products on 2 platforms, first by thunderbird 1:68.2.1+build1-0ubuntu0.18.04.1, released October 22, 2019. It is not reported as exploited. Patch Radar priority: Urgent.
When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. This resulted in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.
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 | 0:68.2.0-2.el8_0 | RHSA-2019:3196 | Oct 24, 2019 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 70.0+build2-0ubuntu0.18.04.1 | firefox 70.0+build2-0ubuntu0.18.04.1 | Jul 9, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 70.0+build2-0ubuntu1 | firefox 70.0+build2-0ubuntu1 | Jul 9, 2020 |
| firefox · ol 8 | 0:68.2.0-2.0.1.el8_0 | ELSA-2019-3196 | Oct 24, 2019 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 70.0+build2-0ubuntu0.18.04.1 | firefox-geckodriver 70.0+build2-0ubuntu0.18.04.1 | Jul 9, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 70.0+build2-0ubuntu1 | firefox-geckodriver 70.0+build2-0ubuntu1 | Jul 9, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 70.0+build2-0ubuntu0.18.04.1 | firefox-mozsymbols 70.0+build2-0ubuntu0.18.04.1 | Jul 9, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 70.0+build2-0ubuntu1 | firefox-mozsymbols 70.0+build2-0ubuntu1 | Jul 9, 2020 |
| thunderbird · RHEL 8 | 0:68.2.0-1.el8_0 | RHSA-2019:3237 | Oct 29, 2019 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:68.2.1+build1-0ubuntu0.18.04.1 | thunderbird 1:68.2.1+build1-0ubuntu0.18.04.1 | Oct 22, 2019 |
| thunderbird · ol 8 | 0:68.2.0-1.0.1.el8_0 | ELSA-2019-3237 | Oct 30, 2019 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:68.2.1+build1-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:68.2.1+build1-0ubuntu0.18.04.1 | Oct 22, 2019 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:68.2.1+build1-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:68.2.1+build1-0ubuntu0.18.04.1 | Oct 22, 2019 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:68.2.1+build1-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:68.2.1+build1-0ubuntu0.18.04.1 | Oct 22, 2019 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:68.2.1+build1-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:68.2.1+build1-0ubuntu0.18.04.1 | Oct 22, 2019 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:68.2.1+build1-0ubuntu0.18.04.1 | xul-ext-lightning 1:68.2.1+build1-0ubuntu0.18.04.1 | Oct 22, 2019 |
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