Firefox ESR: Mozilla developers and community members reported memory safety bugs present in Firefox 75 and Firefox…
CVE-2020-12395 is fixed in 10 products on 2 platforms, first by RHSA-2020:2031, released May 6, 2020. It is not reported as exploited. Patch Radar priority: Urgent.
Mozilla developers and community members reported memory safety bugs present in Firefox 75 and Firefox ESR 68.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
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 | 0:68.8.0-1.el8_2 | RHSA-2020:2031 | May 6, 2020 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 76.0+build2-0ubuntu0.18.04.1 | firefox 76.0+build2-0ubuntu0.18.04.1 | May 6, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 76.0+build2-0ubuntu0.20.04.1 | firefox 76.0+build2-0ubuntu0.20.04.1 | May 6, 2020 |
| firefox · ol 8 | 0:68.8.0-1.0.1.el8_2 | ELSA-2020-2031 | May 9, 2020 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 76.0+build2-0ubuntu0.18.04.1 | firefox-geckodriver 76.0+build2-0ubuntu0.18.04.1 | May 6, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 76.0+build2-0ubuntu0.20.04.1 | firefox-geckodriver 76.0+build2-0ubuntu0.20.04.1 | May 6, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 76.0+build2-0ubuntu0.18.04.1 | firefox-mozsymbols 76.0+build2-0ubuntu0.18.04.1 | May 6, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 76.0+build2-0ubuntu0.20.04.1 | firefox-mozsymbols 76.0+build2-0ubuntu0.20.04.1 | May 6, 2020 |
| thunderbird · RHEL 8 | 0:68.8.0-1.el8_2 | RHSA-2020:2046 | May 11, 2020 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:68.8.0+build2-0ubuntu0.18.04.2 | thunderbird 1:68.8.0+build2-0ubuntu0.18.04.2 | May 6, 2020 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:68.8.0+build2-0ubuntu0.20.04.2 | thunderbird 1:68.8.0+build2-0ubuntu0.20.04.2 | May 6, 2020 |
| thunderbird · ol 8 | 0:68.8.0-1.0.1.el8_2 | ELSA-2020-2046 | May 12, 2020 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:68.8.0+build2-0ubuntu0.18.04.2 | thunderbird-gnome-support 1:68.8.0+build2-0ubuntu0.18.04.2 | May 6, 2020 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:68.8.0+build2-0ubuntu0.20.04.2 | thunderbird-gnome-support 1:68.8.0+build2-0ubuntu0.20.04.2 | May 6, 2020 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:68.8.0+build2-0ubuntu0.18.04.2 | thunderbird-mozsymbols 1:68.8.0+build2-0ubuntu0.18.04.2 | May 6, 2020 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:68.8.0+build2-0ubuntu0.20.04.2 | thunderbird-mozsymbols 1:68.8.0+build2-0ubuntu0.20.04.2 | May 6, 2020 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:68.8.0+build2-0ubuntu0.18.04.2 | xul-ext-calendar-timezones 1:68.8.0+build2-0ubuntu0.18.04.2 | May 6, 2020 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:68.8.0+build2-0ubuntu0.20.04.2 | xul-ext-calendar-timezones 1:68.8.0+build2-0ubuntu0.20.04.2 | May 6, 2020 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:68.8.0+build2-0ubuntu0.18.04.2 | xul-ext-gdata-provider 1:68.8.0+build2-0ubuntu0.18.04.2 | May 6, 2020 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:68.8.0+build2-0ubuntu0.20.04.2 | xul-ext-gdata-provider 1:68.8.0+build2-0ubuntu0.20.04.2 | May 6, 2020 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:68.8.0+build2-0ubuntu0.18.04.2 | xul-ext-lightning 1:68.8.0+build2-0ubuntu0.18.04.2 | May 6, 2020 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:68.8.0+build2-0ubuntu0.20.04.2 | xul-ext-lightning 1:68.8.0+build2-0ubuntu0.20.04.2 | May 6, 2020 |
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