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CVE-2020-12421 When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even if they were…

Description

When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even if they were legitimately added by an administrator.) This could have caused add-ons to become out-of-date silently without notification to the user. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

Affected products and versions

Product Affected versions Fixed in
Firefox ESR 68.10 earliest → < 68.10 68.10
Firefox 78 earliest → < 78 78
Thunderbird 68.10 earliest → < 68.10.0 68.10.0
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