CVE-2021-43545
Mozilla Firefox ESR and 3 others: Using the Location API in a loop could have caused severe application hangs and crashes.
CVE-2021-43545 is fixed in 12 products on 2 platforms, first by Mozilla Thunderbird (en-US) 91.4.0, released December 3, 2021. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
9.8
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0172
77th percentile
Using the Location API in a loop could have caused severe application hangs and crashes. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 102.0 | Mozilla Firefox ESR (en-US) 102.0 | Jun 23, 2022 |
| Mozilla Thunderbird (en-US) | 91.4.0 | Mozilla Thunderbird (en-US) 91.4.0 | Dec 3, 2021 |
| Linux | |||
| firefox · RHEL 8 | 0:91.4.0-1.el8_5 | RHSA-2021:5013 | Dec 8, 2021 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 95.0+build1-0ubuntu0.18.04.1 | firefox 95.0+build1-0ubuntu0.18.04.1 | Dec 7, 2021 |
| firefox · Ubuntu 20.04 LTS (focal) | 95.0+build1-0ubuntu0.20.04.1 | firefox 95.0+build1-0ubuntu0.20.04.1 | Dec 7, 2021 |
| firefox · Ubuntu 22.04.1 LTS (jammy) | 95.0+build1-0ubuntu1 | firefox 95.0+build1-0ubuntu1 | Dec 7, 2021 |
| firefox · almalinux 8 | 91.4.0-1.el8_5.alma | ALSA-2021:5013 | Dec 8, 2021 |
| firefox · ol 8 | 0:91.4.0-1.0.1.el8_5 | ELSA-2021-5013 | Dec 9, 2021 |
| firefox · rocky 8 | 0:91.4.0-1.el8_5 | RLSA-2021:5013 | Dec 8, 2021 |
| firefox-esr · Debian 12.15 (bookworm) | 91.4.0esr-1 | DEBIAN-CVE-2021-43545 | Dec 8, 2021 |
| firefox-esr · Debian 13.5 (trixie) | 91.4.0esr-1 | DEBIAN-CVE-2021-43545 | Dec 8, 2021 |
| firefox-esr · Debian 14 | 91.4.0esr-1 | DEBIAN-CVE-2021-43545 | Dec 8, 2021 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 95.0+build1-0ubuntu0.18.04.1 | firefox-geckodriver 95.0+build1-0ubuntu0.18.04.1 | Dec 7, 2021 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 95.0+build1-0ubuntu0.20.04.1 | firefox-geckodriver 95.0+build1-0ubuntu0.20.04.1 | Dec 7, 2021 |
| firefox-geckodriver · Ubuntu 22.04.1 LTS (jammy) | 95.0+build1-0ubuntu1 | firefox-geckodriver 95.0+build1-0ubuntu1 | Dec 7, 2021 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 95.0+build1-0ubuntu0.18.04.1 | firefox-mozsymbols 95.0+build1-0ubuntu0.18.04.1 | Dec 7, 2021 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 95.0+build1-0ubuntu0.20.04.1 | firefox-mozsymbols 95.0+build1-0ubuntu0.20.04.1 | Dec 7, 2021 |
| firefox-mozsymbols · Ubuntu 22.04.1 LTS (jammy) | 95.0+build1-0ubuntu1 | firefox-mozsymbols 95.0+build1-0ubuntu1 | Dec 7, 2021 |
| thunderbird · Debian 12.15 (bookworm) | 1:91.4.0-1 | DEBIAN-CVE-2021-43545 | Dec 8, 2021 |
| thunderbird · Debian 13.5 (trixie) | 1:91.4.0-1 | DEBIAN-CVE-2021-43545 | Dec 8, 2021 |
| thunderbird · Debian 14 | 1:91.4.0-1 | DEBIAN-CVE-2021-43545 | Dec 8, 2021 |
| thunderbird · RHEL 8 | 0:91.4.0-2.el8_5 | RHSA-2021:5045 | Dec 9, 2021 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | thunderbird 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | thunderbird 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
| thunderbird · almalinux 8 | 91.4.0-2.el8_5.alma | ALSA-2021:5045 | Dec 9, 2021 |
| thunderbird · ol 8 | 0:91.4.0-2.0.1.el8_5 | ELSA-2021-5045 | Dec 10, 2021 |
| thunderbird · rocky 8 | 0:91.4.0-2.el8_5 | RLSA-2021:5045 | Dec 9, 2021 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | thunderbird-gnome-support 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | thunderbird-mozsymbols 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | xul-ext-calendar-timezones 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | xul-ext-gdata-provider 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | xul-ext-lightning 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | xul-ext-lightning 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
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