Description
The signature of a digitally signed S/MIME email message may optionally specify the signature creation date and time. If present, Thunderbird did not compare the signature creation date with the message date and time, and displayed a valid signature despite a date or time mismatch. This could be used to give recipients the impression that a message was sent at a different date or time. This vulnerability affects Thunderbird < 115.6.
References (4)
Core 4
Core References
Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1865647
Third Party Advisory
https://www.debian.org/security/2023/dsa-5582
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-55/
Scores
CVSS v3
4.3
EPSS
0.0029
EPSS Percentile
52.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Details
Status
published
Products (3)
debian/debian_linux
11.0
debian/debian_linux
12.0
mozilla/thunderbird
< 115.6
Published
Dec 19, 2023
Tracked Since
Feb 18, 2026