Firefox ESR and 2 others: When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting…
CVE-2020-15678 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.
When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules. 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 · 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-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 |
| 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-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-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 |
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