CVE-2022-30550

Publication date 7 July 2022

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

An issue was discovered in the auth component in Dovecot 2.2 and 2.3 before 2.3.20. When two passdb configuration entries exist with the same driver and args settings, incorrect username_filter and mechanism settings can be applied to passdb definitions. These incorrectly applied settings can lead to an unintended security configuration and can permit privilege escalation in certain configurations. The documentation does not advise against the use of passdb definitions that have the same driver and args settings. One such configuration would be where an administrator wishes to use the same PAM configuration or passwd file for both normal and master users but use the username_filter setting to restrict which of the users is able to be a master user.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
dovecot	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Fixed 1:2.3.16+dfsg1-3ubuntu4
	22.04 LTS jammy	Fixed 1:2.3.16+dfsg1-3ubuntu2.1
	21.10 impish	Fixed 1:2.3.13+dfsg1-1ubuntu3.1
	20.04 LTS focal	Fixed 1:2.3.7.2-1ubuntu3.6
	18.04 LTS bionic	Fixed 1:2.2.33.2-1ubuntu4.8
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Needs evaluation

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
dovecot	Upstream: 7bad6a2 Upstream: a102207

Severity score breakdown

Parameter	Value
Base score	8.8 · High
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-5509-1
Dovecot vulnerability
11 July 2022