Firefox ESR and 2 others: Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2.
CVE-2020-15673 is fixed in 11 products on 2 platforms, first by RHSA-2020:3832, released September 24, 2020. It is not reported as exploited. Patch Radar priority: High.
Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. 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 < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 91.0 | Mozilla Firefox ESR (en-US) 91.0 | Aug 4, 2021 |
| Mozilla Thunderbird (en-US) | 78.4.0 | Mozilla Thunderbird (en-US) 78.4.0 | Oct 19, 2020 |
| Linux | |||
| firefox · RHEL 8 | 0:78.3.0-1.el8_2 | RHSA-2020:3832 | Sep 24, 2020 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 81.0+build2-0ubuntu0.18.04.1 | firefox 81.0+build2-0ubuntu0.18.04.1 | Sep 24, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 81.0+build2-0ubuntu0.20.04.1 | firefox 81.0+build2-0ubuntu0.20.04.1 | Sep 24, 2020 |
| firefox · ol 8 | 0:78.3.0-1.0.1.el8_2 | ELSA-2020-3832 | Sep 24, 2020 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 81.0+build2-0ubuntu0.18.04.1 | firefox-geckodriver 81.0+build2-0ubuntu0.18.04.1 | Sep 24, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 81.0+build2-0ubuntu0.20.04.1 | firefox-geckodriver 81.0+build2-0ubuntu0.20.04.1 | Sep 24, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 81.0+build2-0ubuntu0.18.04.1 | firefox-mozsymbols 81.0+build2-0ubuntu0.18.04.1 | Sep 24, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 81.0+build2-0ubuntu0.20.04.1 | firefox-mozsymbols 81.0+build2-0ubuntu0.20.04.1 | Sep 24, 2020 |
| thunderbird · RHEL 8 | 0:78.3.1-1.el8_2 | RHSA-2020:4155 | Oct 1, 2020 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | thunderbird 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:78.7.1+build1-0ubuntu0.20.04.1 | thunderbird 1:78.7.1+build1-0ubuntu0.20.04.1 | Jan 25, 2021 |
| thunderbird · ol 8 | 0:78.3.1-1.0.1.el8_2 | ELSA-2020-4155 | Oct 4, 2020 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:78.7.1+build1-0ubuntu0.20.04.1 | thunderbird-gnome-support 1:78.7.1+build1-0ubuntu0.20.04.1 | Jan 25, 2021 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:78.7.1+build1-0ubuntu0.20.04.1 | thunderbird-mozsymbols 1:78.7.1+build1-0ubuntu0.20.04.1 | Jan 25, 2021 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:78.7.1+build1-0ubuntu0.20.04.1 | xul-ext-calendar-timezones 1:78.7.1+build1-0ubuntu0.20.04.1 | Jan 25, 2021 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:78.7.1+build1-0ubuntu0.20.04.1 | xul-ext-gdata-provider 1:78.7.1+build1-0ubuntu0.20.04.1 | Jan 25, 2021 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | xul-ext-lightning 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:78.7.1+build1-0ubuntu0.20.04.1 | xul-ext-lightning 1:78.7.1+build1-0ubuntu0.20.04.1 | Jan 25, 2021 |
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