# CVE-2020-12398: thunderbird: Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 68.9.0.... CVE-2020-12398 is fixed in 6 products on 1 platform, first by RHSA-2020:2614, released June 22, 2020. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2020-12398 - Priority: High - CVSS: 7.5 (Important) - EPSS: 0.0098 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 8, 2020 ## Description Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 68.9.0. Security Fix(es): * Mozilla: Security downgrade with IMAP STARTTLS leads to information leakage (CVE-2020-12398) * Mozilla: Use-after-free in SharedWorkerService (CVE-2020-12405) * Mozilla: JavaScript Type confusion with NativeTypes (CVE-2020-12406) * Mozilla: Memory safety bugs fixed in Firefox 77 and Firefox ESR 68.9 (CVE-2020-12410) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | thunderbird RHEL 8 | 0:68.9.0-1.el8_2 | [RHSA-2020:2614](https://patchblox.com/security/data/fix/linux/rhsa-2020-2614.md) | Jun 22, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-68.10.0-build1-0ubuntu0.18.04.1.md) | Oct 8, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-68.10.0-build1-0ubuntu0.20.04.1.md) | Oct 8, 2020 | | Linux | thunderbird ol 8 | 0:68.9.0-1.0.1.el8_2 | [ELSA-2020-2614](https://patchblox.com/security/data/fix/linux/elsa-2020-2614.md) | Jun 23, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-68.10.0-build1-0ubuntu0.18.04.1.md) | Oct 8, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-68.10.0-build1-0ubuntu0.20.04.1.md) | Oct 8, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-68.10.0-build1-0ubuntu0.18.04.1.md) | Oct 8, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-68.10.0-build1-0ubuntu0.20.04.1.md) | Oct 8, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-68.10.0-build1-0ubuntu0.18.04.1.md) | Oct 8, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-68.10.0-build1-0ubuntu0.20.04.1.md) | Oct 8, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-68.10.0-build1-0ubuntu0.18.04.1.md) | Oct 8, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-68.10.0-build1-0ubuntu0.20.04.1.md) | Oct 8, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-68.10.0-build1-0ubuntu0.18.04.1.md) | Oct 8, 2020 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-68.10.0-build1-0ubuntu0.20.04.1.md) | Oct 8, 2020 | --- Data as of 2026-11-08T06:59:42Z UTC. 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