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If sendmail is not required on AIX, the sendmail service must be disabled.


Overview

Finding ID Version Rule ID IA Controls Severity
V-215353 AIX7-00-003047 SV-215353r508663_rule Medium
Description
The sendmail service has many historical vulnerabilities and, where possible, should be disabled. If the system is not required to operate as a mail server i.e. sending, receiving or processing e-mail, disable the sendmail daemon.
STIG Date
IBM AIX 7.x Security Technical Implementation Guide 2021-06-16

Details

Check Text ( C-16551r294510_chk )
From the command prompt, execute the following command:
# grep "^start[[:blank:]]/usr/lib/sendmail" /etc/rc.tcpip

If the above command produces any output, this is a finding.
Fix Text (F-16549r294511_fix)
In "/etc/rc.tcpip", comment out the "sendmail" entry by running command:
# chrctcp -d sendmail