IBM AIX 7.x Security Technical Implementation Guide

The IBM AIX 7.x Security Technical Implementation Guide (V3 R4) has 282 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V3 · R4

CurrentPublished Wed Sep 30 2026

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

IBM AIX 7.x Security Technical Implementation Guide

Assessment Title

Rule Text

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

Description

Discussion Text

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.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-215353

Rule

SV-215353r958478_rule

Severity

medium

Rule Version

AIX7-00-003047

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

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.

Implementation Procedure

Fix Text

In "/etc/rc.tcpip", comment out the "sendmail" entry by running command: 
# chrctcp -d sendmail

STIG check 179 of 282 in the IBM AIX 7.x STIG checklist

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