When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mailing list gateway, Thunderbird only considered the inner signed message for the signature validity. This gave the false impression that the additional contents were also covered by the digital signature. Starting with Thunderbird version 91.4.1, only the signature that belongs to the top level MIME part will be considered for the displayed status. This vulnerability affects Thunderbird < 91.4.1.
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History
Wed, 16 Apr 2025 16:15:00 +0000
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Status: PUBLISHED
Assigner: mozilla
Published: 2022-12-22T00:00:00.000Z
Updated: 2025-04-16T15:51:48.700Z
Reserved: 2021-12-16T00:00:00.000Z
Link: CVE-2021-4126
Updated: 2024-08-03T17:16:04.116Z
Status : Modified
Published: 2022-12-22T20:15:11.647
Modified: 2025-04-16T16:15:18.487
Link: CVE-2021-4126
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