CVE-2022-1834
Publication date 1 June 2022
Last updated 25 August 2025
Ubuntu priority
Description
When displaying the sender of an email, and the sender name contained the Braille Pattern Blank space character multiple times, Thunderbird would have displayed all the spaces. This could have been used by an attacker to send an email message with the attacker's digital signature, that was shown with an arbitrary sender email address chosen by the attacker. If the sender name started with a false email address, followed by many Braille space characters, the attacker's email address was not visible. Because Thunderbird compared the invisible sender address with the signature's email address, if the signing key or certificate was accepted by Thunderbird, the email was shown as having a valid digital signature. This vulnerability affects Thunderbird < 91.10.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| thunderbird | ||
| 22.04 LTS jammy |
Fixed 1:91.11.0+build2-0ubuntu0.22.04.1
|
|
| 20.04 LTS focal |
Fixed 1:91.11.0+build2-0ubuntu0.20.04.1
|
|
| 18.04 LTS bionic |
Fixed 1:91.11.0+build2-0ubuntu0.18.04.1
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
6.5 · Medium
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
References
Related Ubuntu Security Notices (USN)
- USN-5512-1
- Thunderbird vulnerabilities
- 14 July 2022