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CVE-2019-11755

Published: 27 September 2019

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
thunderbird
Launchpad, Ubuntu, Debian
bionic
Released (1:68.2.1+build1-0ubuntu0.18.04.1)
disco Ignored
(end of life)
eoan
Released (1:68.1.1+build1-0ubuntu1)
trusty Does not exist

upstream
Released (68.1.1)
xenial
Released (1:68.7.0+build1-0ubuntu0.16.04.2)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N