Firefox ESR and 1 other: Further techniques that built on the slipstream research combined with a malicious webpage could have…
CVE-2021-23961 is fixed in 10 products on 2 platforms, first by firefox 85.0+build1-0ubuntu0.18.04.1, released January 25, 2021. It is not reported as exploited. Patch Radar priority: High.
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.
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 |
| Linux | |||
| firefox · RHEL 8 | 0:78.10.0-1.el8_3 | RHSA-2021:1360 | Apr 26, 2021 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 85.0+build1-0ubuntu0.18.04.1 | firefox 85.0+build1-0ubuntu0.18.04.1 | Jan 25, 2021 |
| firefox · Ubuntu 20.04 LTS (focal) | 85.0+build1-0ubuntu0.20.04.1 | firefox 85.0+build1-0ubuntu0.20.04.1 | Jan 25, 2021 |
| firefox · ol 8 | 0:78.10.0-1.0.1.el8_3 | ELSA-2021-1360 | Apr 27, 2021 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 85.0+build1-0ubuntu0.18.04.1 | firefox-geckodriver 85.0+build1-0ubuntu0.18.04.1 | Jan 25, 2021 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 85.0+build1-0ubuntu0.20.04.1 | firefox-geckodriver 85.0+build1-0ubuntu0.20.04.1 | Jan 25, 2021 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 85.0+build1-0ubuntu0.18.04.1 | firefox-mozsymbols 85.0+build1-0ubuntu0.18.04.1 | Jan 25, 2021 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 85.0+build1-0ubuntu0.20.04.1 | firefox-mozsymbols 85.0+build1-0ubuntu0.20.04.1 | Jan 25, 2021 |
| thunderbird · RHEL 8 | 0:78.10.0-1.el8_3 | RHSA-2021:1353 | Apr 26, 2021 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | thunderbird 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | thunderbird 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| thunderbird · ol 8 | 0:78.10.0-1.0.1.el8_3 | ELSA-2021-1353 | Apr 27, 2021 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | thunderbird-gnome-support 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | thunderbird-gnome-support 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | thunderbird-mozsymbols 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | thunderbird-mozsymbols 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | xul-ext-calendar-timezones 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | xul-ext-calendar-timezones 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | xul-ext-gdata-provider 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | xul-ext-gdata-provider 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | xul-ext-lightning 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | xul-ext-lightning 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
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