CVE-2021-38502
Published: 3 November 2021
Thunderbird ignored the configuration to require STARTTLS security for an SMTP connection. A MITM could perform a downgrade attack to intercept transmitted messages, or could take control of the authenticated session to execute SMTP commands chosen by the MITM. If an unprotected authentication method was configured, the MITM could obtain the authentication credentials, too. This vulnerability affects Thunderbird < 91.2.
Priority
Status
Package | Release | Status |
---|---|---|
thunderbird Launchpad, Ubuntu, Debian |
lunar |
Released
(1:91.3.1+build1-0ubuntu1)
|
bionic |
Released
(1:91.5.0+build1-0ubuntu0.18.04.1)
|
|
focal |
Released
(1:91.5.0+build1-0ubuntu0.20.04.1)
|
|
hirsute |
Ignored
(end of life)
|
|
impish |
Released
(1:91.3.1+build1-0ubuntu0.21.10.1)
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Released
(91.2)
|
|
jammy |
Released
(1:91.3.1+build1-0ubuntu1)
|
|
kinetic |
Released
(1:91.3.1+build1-0ubuntu1)
|
|
xenial |
Ignored
(end of standard support)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.9 |
Attack vector | Network |
Attack complexity | High |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |