CVE-2019-11755
Publication date 27 September 2019
Last updated 25 August 2025
Ubuntu priority
Description
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| thunderbird | ||
| 18.04 LTS bionic |
Fixed 1:68.2.1+build1-0ubuntu0.18.04.1
|
|
| 16.04 LTS xenial |
Fixed 1:68.7.0+build1-0ubuntu0.16.04.2
|
|
| 14.04 LTS trusty | Not in release |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| 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 |
References
Related Ubuntu Security Notices (USN)
- USN-4202-1
- Thunderbird vulnerabilities
- 26 November 2019
- USN-4335-1
- Thunderbird vulnerabilities
- 21 April 2020