Mozilla Firefox And Thunderbird Type Confusion Vulnerability
CVE-2019-17026 is fixed in 10 products on 2 platforms, first by firefox 72.0.1+build1-0ubuntu0.18.04.1, released January 8, 2020. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021. Patch Radar priority: Patch now.
Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1.
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 | 0:68.4.1-1.el8_1 | RHSA-2020:0111 | Jan 14, 2020 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 72.0.1+build1-0ubuntu0.18.04.1 | firefox 72.0.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 72.0.1+build1-0ubuntu1 | firefox 72.0.1+build1-0ubuntu1 | Jan 8, 2020 |
| firefox · ol 8 | 0:68.4.1-1.0.1.el8_1 | ELSA-2020-0111 | Jan 15, 2020 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 72.0.1+build1-0ubuntu0.18.04.1 | firefox-geckodriver 72.0.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 72.0.1+build1-0ubuntu1 | firefox-geckodriver 72.0.1+build1-0ubuntu1 | Jan 8, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 72.0.1+build1-0ubuntu0.18.04.1 | firefox-mozsymbols 72.0.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 72.0.1+build1-0ubuntu1 | firefox-mozsymbols 72.0.1+build1-0ubuntu1 | Jan 8, 2020 |
| thunderbird · RHEL 8 | 0:68.4.1-2.el8_1 | RHSA-2020:0127 | Jan 16, 2020 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | thunderbird 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | thunderbird 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
| thunderbird · ol 8 | 0:68.4.1-2.0.1.el8_1 | ELSA-2020-0127 | Jan 18, 2020 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | thunderbird-gnome-support 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | thunderbird-mozsymbols 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | xul-ext-calendar-timezones 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | xul-ext-gdata-provider 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | xul-ext-lightning 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | xul-ext-lightning 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
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