CVE-2022-30550

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.

• CWE-287

• https://dovecot.org/securityVendor Advisory
• https://lists.debian.org/debian-lts-announce/2022/09/msg00032.htmlMailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202310-19Third Party Advisory
• https://www.dovecot.org/download/Product
• https://www.openwall.com/lists/oss-security/2022/07/08/1Mailing List, Patch, Third Party Advisory
• https://dovecot.org/securityVendor Advisory
• https://lists.debian.org/debian-lts-announce/2022/09/msg00032.htmlMailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202310-19Third Party Advisory
• https://www.dovecot.org/download/Product
• https://www.openwall.com/lists/oss-security/2022/07/08/1Mailing List, Patch, Third Party Advisory

Published

Jul 17, 2022

Last Modified

Jun 17, 2026

Status

Analyzed