| name | cis-ubuntu1604-v200-2-1-11 |
| description | Ensure IMAP and POP3 server are not installed |
| category | cis-networking |
| version | 2.0.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-16.04","services"] |
| cis_id | 2.1.11 |
| cis_benchmark | CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
2.1.11 Ensure IMAP and POP3 server are not installed (Automated)
Description
dovecot-imapd and dovecot-pop3d are an open source IMAP and POP3 server for Linux based systems.
Rationale
Unless POP3 and/or IMAP servers are to be provided by this system, it is recommended that the package be removed to reduce the potential attack surface.
Audit Procedure
Command Line
Run the following command to verify dovecot-imapd and dovecot-pop3d are not installed:
dpkg -s dovecot-imapd dovecot-pop3d | grep -E '(Status:|not installed)'
Expected Result
dpkg-query: package 'dovecot-imapd' is not installed and no information is available
dpkg-query: package 'dovecot-pop3d' is not installed and no information is available
Remediation
Command Line
Run one of the following commands to remove dovecot-imapd and dovecot-pop3d:
apt purge dovecot-imapd dovecot-pop3d
Default Value
dovecot-imapd and dovecot-pop3d are not installed on minimal server installations. Several IMAP/POP3 servers exist and can use other service names. courier-imap and cyrus-imap are example services that provide a mail server. These and other services should also be audited.
References
- CIS Controls v7 - 9.2 Ensure Only Approved Ports, Protocols and Services Are Running
Profile
- Level 1 - Server
- Level 1 - Workstation