A crafted S/MIME message consisting of an inner encryption layer and an
outer SignedData layer was shown as having a valid digital signature,
although the signer might have had no access to the contents of the
encrypted message, and might have stripped a different signature from the
encrypted message. Previous versions had only suppressed showing a digital
signature for messages with an outer multipart/signed layer. This
vulnerability affects Thunderbird < 68.1.1.
Upstream:released (68.1.1)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):released (1:68.7.0+build1-0ubuntu0.16.04.2)
Ubuntu 18.04 LTS (Bionic Beaver):released (1:68.2.1+build1-0ubuntu0.18.04.1)
Ubuntu 19.10 (Eoan Ermine):released (1:68.1.1+build1-0ubuntu1)
Ubuntu 20.04 (Focal Fossa):not-affected (1:68.1.2+build1-0ubuntu1)
More Information

Updated: 2020-04-21 23:23:17 UTC (commit d561fac80febc8c3f3b3fa9e461482b7aca4e740)