CVE-2021-38502

Publication date 3 November 2021

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
thunderbird	23.04 lunar	Fixed 1:91.3.1+build1-0ubuntu1
	22.10 kinetic	Fixed 1:91.3.1+build1-0ubuntu1
	22.04 LTS jammy	Fixed 1:91.3.1+build1-0ubuntu1
	21.10 impish	Fixed 1:91.3.1+build1-0ubuntu0.21.10.1
	21.04 hirsute	Ignored end of life
	20.04 LTS focal	Fixed 1:91.5.0+build1-0ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 1:91.5.0+build1-0ubuntu0.18.04.1
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support

Severity score breakdown

Parameter	Value
Base score	5.9 · Medium
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

References

Related Ubuntu Security Notices (USN)