Vulnerability · Published Jul 17, 2022 · Assigned by mitre
CVE-2022-30550
High 8.8
In plain English
A high-severity security flaw in the dovecot package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 83% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | dovecot | 1:2.3.16-3.el8 | ALSA-2022:7623 |
| AlmaLinux:9 | dovecot | 1:2.3.16-7.el9 | ALSA-2022:8208 |
| AlmaLinux:8 | dovecot-devel | 1:2.3.16-3.el8 | ALSA-2022:7623 |
| AlmaLinux:9 | dovecot-devel | 1:2.3.16-7.el9 | ALSA-2022:8208 |
| AlmaLinux:8 | dovecot-mysql | 1:2.3.16-3.el8 | ALSA-2022:7623 |
| AlmaLinux:9 | dovecot-mysql | 1:2.3.16-7.el9 | ALSA-2022:8208 |
| AlmaLinux:8 | dovecot-pgsql | 1:2.3.16-3.el8 | ALSA-2022:7623 |
| AlmaLinux:9 | dovecot-pgsql | 1:2.3.16-7.el9 | ALSA-2022:8208 |
| AlmaLinux:8 | dovecot-pigeonhole | 1:2.3.16-3.el8 | ALSA-2022:7623 |
| AlmaLinux:9 | dovecot-pigeonhole | 1:2.3.16-7.el9 | ALSA-2022:8208 |
| Alpine:v3.20 | dovecot | 2.3.19.1-r5 | ALPINE-CVE-2022-30550 |
| Alpine:v3.21 | dovecot | 2.3.19.1-r5 | ALPINE-CVE-2022-30550 |
| Alpine:v3.22 | dovecot | 2.3.19.1-r5 | ALPINE-CVE-2022-30550 |
| Alpine:v3.23 | dovecot | 2.3.19.1-r5 | ALPINE-CVE-2022-30550 |
| Alpine:v3.24 | dovecot | 2.3.19.1-r5 | ALPINE-CVE-2022-30550 |
| Debian:12 | dovecot | 1:2.3.19.1+dfsg1-2 | DEBIAN-CVE-2022-30550 |
| Debian:13 | dovecot | 1:2.3.19.1+dfsg1-2 | DEBIAN-CVE-2022-30550 |
| Debian:14 | dovecot | 1:2.3.19.1+dfsg1-2 | DEBIAN-CVE-2022-30550 |
| Rocky Linux:8 | dovecot | 1:2.3.16-3.el8 | RLSA-2022:7623 |
| Rocky Linux:9 | dovecot | 1:2.3.16-7.el9 | RLSA-2022:8208 |
| Ubuntu:22.04:LTS | dovecot | 1:2.3.16+dfsg1-3ubuntu2.1 | USN-5509-1 |
| Ubuntu:22.04:LTS | dovecot | 1:2.3.16+dfsg1-3ubuntu2.1 | UBUNTU-CVE-2022-30550 |