CVE-2022-26387
Mozilla Thunderbird and 4 others: Time-of-check Time-of-use (TOCTOU) Race Condition
CVE-2022-26387 is fixed in 13 products on 2 platforms, first by Mozilla Firefox (en-US) 98.0, released March 8, 2022. It is not reported as exploited. Patch Radar priority: Urgent.
UrgentFixed on 2 platforms
CVSS
9.8
Critical
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0066
51st percentile
When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified and Firefox would not have noticed. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox (en-US) | 98.0 | Mozilla Firefox (en-US) 98.0 | Mar 8, 2022 |
| Mozilla Firefox ESR (en-US) | 102.0 | Mozilla Firefox ESR (en-US) 102.0 | Jun 23, 2022 |
| Mozilla Thunderbird (en-US) | 91.7.0 | Mozilla Thunderbird (en-US) 91.7.0 | Mar 8, 2022 |
| Linux | |||
| firefox · RHEL 8 | 0:91.7.0-3.el8_5 | RHSA-2022:0818 | Mar 10, 2022 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | firefox 98.0+build3-0ubuntu0.18.04.2 | Mar 8, 2022 |
| firefox · Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | firefox 98.0+build3-0ubuntu0.20.04.2 | Mar 8, 2022 |
| firefox · Ubuntu 22.04.1 LTS (jammy) | 1:1snap1-0ubuntu1 | firefox 1:1snap1-0ubuntu1 | Apr 6, 2022 |
| firefox · almalinux 8 | 91.7.0-3.el8_5.alma | ALSA-2022:0818 | Mar 10, 2022 |
| firefox · ol 8 | 0:91.7.0-3.0.1.el8_5 | ELSA-2022-0818 | Mar 10, 2022 |
| firefox · rocky 8 | 0:91.7.0-3.el8_5 | RLSA-2022:0818 | Mar 10, 2022 |
| firefox-esr · Debian 12.15 (bookworm) | 91.7.0esr-1 | DEBIAN-CVE-2022-26387 | Dec 22, 2022 |
| firefox-esr · Debian 13.5 (trixie) | 91.7.0esr-1 | DEBIAN-CVE-2022-26387 | Dec 22, 2022 |
| firefox-esr · Debian 14 | 91.7.0esr-1 | DEBIAN-CVE-2022-26387 | Dec 22, 2022 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | firefox-geckodriver 98.0+build3-0ubuntu0.18.04.2 | Mar 8, 2022 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | firefox-geckodriver 98.0+build3-0ubuntu0.20.04.2 | Mar 8, 2022 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | firefox-mozsymbols 98.0+build3-0ubuntu0.18.04.2 | Mar 8, 2022 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | firefox-mozsymbols 98.0+build3-0ubuntu0.20.04.2 | Mar 8, 2022 |
| thunderbird · Debian 12.15 (bookworm) | 1:91.7.0-1 | DEBIAN-CVE-2022-26387 | Dec 22, 2022 |
| thunderbird · Debian 13.5 (trixie) | 1:91.7.0-1 | DEBIAN-CVE-2022-26387 | Dec 22, 2022 |
| thunderbird · Debian 14 | 1:91.7.0-1 | DEBIAN-CVE-2022-26387 | Dec 22, 2022 |
| thunderbird · RHEL 8 | 0:91.7.0-2.el8_5 | RHSA-2022:0845 | Mar 14, 2022 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:91.7.0+build2-0ubuntu0.18.04.1 | thunderbird 1:91.7.0+build2-0ubuntu0.18.04.1 | Mar 8, 2022 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:91.7.0+build2-0ubuntu0.20.04.1 | thunderbird 1:91.7.0+build2-0ubuntu0.20.04.1 | Mar 8, 2022 |
| thunderbird · Ubuntu 22.04.1 LTS (jammy) | 1:91.7.0+build2-0ubuntu1 | thunderbird 1:91.7.0+build2-0ubuntu1 | Mar 8, 2022 |
| thunderbird · almalinux 8 | 91.7.0-2.el8_5.alma | ALSA-2022:0845 | Mar 14, 2022 |
| thunderbird · ol 8 | 0:91.7.0-2.0.1.el8_5 | ELSA-2022-0845 | Mar 14, 2022 |
| thunderbird · rocky 8 | 0:91.7.0-2.el8_5 | RLSA-2022:0845 | Mar 14, 2022 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:91.7.0+build2-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:91.7.0+build2-0ubuntu0.18.04.1 | Mar 8, 2022 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:91.7.0+build2-0ubuntu0.20.04.1 | thunderbird-gnome-support 1:91.7.0+build2-0ubuntu0.20.04.1 | Mar 8, 2022 |
| thunderbird-gnome-support · Ubuntu 22.04.1 LTS (jammy) | 1:91.7.0+build2-0ubuntu1 | thunderbird-gnome-support 1:91.7.0+build2-0ubuntu1 | Mar 8, 2022 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:91.7.0+build2-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:91.7.0+build2-0ubuntu0.18.04.1 | Mar 8, 2022 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:91.7.0+build2-0ubuntu0.20.04.1 | thunderbird-mozsymbols 1:91.7.0+build2-0ubuntu0.20.04.1 | Mar 8, 2022 |
| thunderbird-mozsymbols · Ubuntu 22.04.1 LTS (jammy) | 1:91.7.0+build2-0ubuntu1 | thunderbird-mozsymbols 1:91.7.0+build2-0ubuntu1 | Mar 8, 2022 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:91.7.0+build2-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:91.7.0+build2-0ubuntu0.18.04.1 | Mar 8, 2022 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:91.7.0+build2-0ubuntu0.20.04.1 | xul-ext-calendar-timezones 1:91.7.0+build2-0ubuntu0.20.04.1 | Mar 8, 2022 |
| xul-ext-calendar-timezones · Ubuntu 22.04.1 LTS (jammy) | 1:91.7.0+build2-0ubuntu1 | xul-ext-calendar-timezones 1:91.7.0+build2-0ubuntu1 | Mar 8, 2022 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:91.7.0+build2-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:91.7.0+build2-0ubuntu0.18.04.1 | Mar 8, 2022 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:91.7.0+build2-0ubuntu0.20.04.1 | xul-ext-gdata-provider 1:91.7.0+build2-0ubuntu0.20.04.1 | Mar 8, 2022 |
| xul-ext-gdata-provider · Ubuntu 22.04.1 LTS (jammy) | 1:91.7.0+build2-0ubuntu1 | xul-ext-gdata-provider 1:91.7.0+build2-0ubuntu1 | Mar 8, 2022 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:91.7.0+build2-0ubuntu0.18.04.1 | xul-ext-lightning 1:91.7.0+build2-0ubuntu0.18.04.1 | Mar 8, 2022 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:91.7.0+build2-0ubuntu0.20.04.1 | xul-ext-lightning 1:91.7.0+build2-0ubuntu0.20.04.1 | Mar 8, 2022 |
| xul-ext-lightning · Ubuntu 22.04.1 LTS (jammy) | 1:91.7.0+build2-0ubuntu1 | xul-ext-lightning 1:91.7.0+build2-0ubuntu1 | Mar 8, 2022 |
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