SV-38952r1: The portmap or rpcbind service must not be installed unless needed. | AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

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Assessment Title

Rule Text

The portmap or rpcbind service must not be installed unless needed.

Description

Discussion Text

The portmap and rpcbind services increase the attack surface of the system and should only be used when needed. The portmap or rpcbind services are used by a variety of services using Remote Procedure Calls (RPCs).

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000305

Additional Details

Responsibility

System Administrator

IA Controls

ECSC-1

References

DPMS Target AIX 6.1 DISA DPMS Target AIX 6.1 2176

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.fso.aix11:def:231
# The portmap or rpcbind service must not be installed unless needed.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Test mode of /usr/sbin/portmap is 0 or less permissive
# file_object (file_test)
test_1() {
  ( (stat -c '%A' '/usr/sbin/portmap' | awk '{print (substr($0,3,1)=="w")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/usr/sbin/portmap' | awk '{print (substr($0,7,1)=="x" || substr($0,7,1)=="s")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/usr/sbin/portmap' | awk '{print (substr($0,8,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/usr/sbin/portmap' | awk '{print (substr($0,4,1)=="x" || substr($0,4,1)=="s")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/usr/sbin/portmap' | awk '{print (substr($0,7,1)=="s" || substr($0,7,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/usr/sbin/portmap' | awk '{print (substr($0,4,1)=="s" || substr($0,4,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/usr/sbin/portmap' | awk '{print (substr($0,10,1)=="x" || substr($0,10,1)=="t")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/usr/sbin/portmap' | awk '{print (substr($0,9,1)=="w")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/usr/sbin/portmap' | awk '{print (substr($0,2,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/usr/sbin/portmap' | awk '{print (substr($0,5,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/usr/sbin/portmap' | awk '{print (substr($0,6,1)=="w")?"true":"false"}') | grep -qxF 'false' )
}

if test_1; then
  echo "PASS"
else
  echo "FAIL"
fi

Remediation

If the portmap or rpcbind service is part of a removable package, consult vendor documentation for the procedure to remove the package. If the service cannot be removed, prevent service activation by removing all permissions from the executable.  

Procedure:
# chmod 0000 /usr/sbin/portmap