Firefox ESR: Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier,…
CVE-2020-12417 is fixed in 10 products on 2 platforms, first by Mozilla Firefox ESR (en-US) 78.0esr, released June 25, 2020. It is not reported as exploited. Patch Radar priority: High.
Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash. *Note: this issue only affects Firefox on ARM64 platforms.* This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
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 | 0:68.10.0-1.el8_2 | RHSA-2020:2828 | Jul 6, 2020 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 78.0.1+build1-0ubuntu0.18.04.1 | firefox 78.0.1+build1-0ubuntu0.18.04.1 | Jun 30, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 78.0.1+build1-0ubuntu0.20.04.1 | firefox 78.0.1+build1-0ubuntu0.20.04.1 | Jun 30, 2020 |
| firefox · ol 8 | 0:68.10.0-1.0.1.el8_2 | ELSA-2020-2828 | Jul 8, 2020 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 78.0.1+build1-0ubuntu0.18.04.1 | firefox-geckodriver 78.0.1+build1-0ubuntu0.18.04.1 | Jun 30, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 78.0.1+build1-0ubuntu0.20.04.1 | firefox-geckodriver 78.0.1+build1-0ubuntu0.20.04.1 | Jun 30, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 78.0.1+build1-0ubuntu0.18.04.1 | firefox-mozsymbols 78.0.1+build1-0ubuntu0.18.04.1 | Jun 30, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 78.0.1+build1-0ubuntu0.20.04.1 | firefox-mozsymbols 78.0.1+build1-0ubuntu0.20.04.1 | Jun 30, 2020 |
| thunderbird · RHEL 8 | 0:68.10.0-1.el8_2 | RHSA-2020:3038 | Jul 21, 2020 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | thunderbird 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | thunderbird 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
| thunderbird · ol 8 | 0:68.10.0-1.0.1.el8_2 | ELSA-2020-3038 | Jul 22, 2020 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | thunderbird-gnome-support 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | thunderbird-mozsymbols 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | xul-ext-calendar-timezones 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | xul-ext-gdata-provider 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | xul-ext-lightning 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | xul-ext-lightning 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
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