Mozilla releases security updates for Firefox 92, Firefox ESR 91.1, Thunderbird 91, Firefox ESR 78.14, and Thunderbird 78.14

Hello everyone,

Mozilla has fixed several high severity security vulnerabilities in Firefox 92, Firefox ESR 91.1, Thunderbird 91, Firefox ESR 78.14, and Thunderbird 78.14. The details of the vulnerabilities fixed are as follows:

Platform	CVE ID	Vulnerability	Impact
Thunderbird 91	CVE-2021-29980	Uninitialized memory in a canvas object could have led to memory corruption	High
Thunderbird 91	CVE-2021-29981	Live range splitting could have led to conflicting assignments in the JIT	High
Thunderbird 91	CVE-2021-29982	Single bit data leak due to incorrect JIT optimization and type confusion	Low
Thunderbird 91	CVE-2021-29984	Incorrect instruction reordering during JIT optimization	High
Thunderbird 91	CVE-2021-29985	Use-after-free media channels	Moderate
Thunderbird 91	CVE-2021-29986	Race condition when resolving DNS names could have led to memory corruption	High
Thunderbird 91	CVE-2021-29987	Users could have been tricked into accepting unwanted permissions on Linux	Moderate
Thunderbird 91	CVE-2021-29988	Memory corruption as a result of incorrect style treatment	High
Thunderbird 91	CVE-2021-29989	Memory safety bugs fixed in Firefox 91 and Firefox ESR 78.13	High
Firefox 92	CVE-2021-29993	Handling custom intents could lead to crashes and UI spoofs	High
Firefox 92	CVE-2021-38491	Mixed-Content-Blocking was unable to check opaque origins	Moderate
Firefox 92, Firefox ESR 91.1, Firefox ESR 78.14	CVE-2021-38492	Navigating to `mk:` URL scheme could load Internet Explorer	Moderate
Firefox 92, Firefox ESR 78.14, Firefox ESR 91.1	CVE-2021-38493	Memory safety bugs fixed in Firefox 92, Firefox ESR 78.14 and Firefox ESR 91.1	High
Firefox 92	CVE-2021-38494	Memory safety bugs fixed in Firefox 92	High
Firefox 92, Firefox ESR 91.1	CVE-2021-38495	Memory safety bugs fixed in Firefox 92 and Firefox ESR 91.1	High

To patch these vulnerabilities, initiate a sync between the Central Patch Repository and the Desktop Central server. Once synced, search for the following Patch IDs or Bulletin IDs and deploy them to your target systems.

Patch ID	Bulletin ID	Patch Description
321303	TU-028	Mozilla Thunderbird (78.14.0)
321304	TU-028	Mozilla Thunderbird (91) (91.1.0)
321305	TU-028	Mozilla Thunderbird (x64) (78.14.0)
321306	TU-028	Mozilla Thunderbird (91) (x64) (91.1.0)
321298	TU-054	Mozilla Firefox ESR (78.14.0)
321299	TU-054	Mozilla Firefox ESR (91) (91.1.0)
321300	TU-054	Mozilla Firefox ESR (x64) (78.14.0)
321301	TU-054	Mozilla Firefox ESR (91) (x64) (91.1.0)
321296	TU-027	Mozilla Firefox (92.0)
321302	TU-027	Mozilla Firefox (x64) (92.0)