SV-216350r959010: The nobody access for RPC encryption key storage service must be disabled. | Solaris 11 SPARC STIG SCAP Benchmark

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Assessment Title

Rule Text

The nobody access for RPC encryption key storage service must be disabled.

Description

Discussion Text

If login by the user "nobody" is allowed for secure RPC, there is an increased risk of system compromise. If keyserv holds a private key for the "nobody" user, it will be used by key_encryptsession to compute a magic phrase which can be easily recovered by a malicious user.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366SV-60961V-48089

References

DPMS Target Solaris 11 SPARC DISA DPMS Target Solaris 11 SPARC 4022

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.stig.solaris11:def:60
# The nobody access for RPC encryption key storage service must be disabled.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Check to see that nobody keys are disabled.
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^\s*ENABLE_NOBODY_KEYS=(\S+)\s*$/\1/p' '/etc/default/keyserv') | grep -Pq '^[Nn][Oo]$'
}

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

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# OVAL definition: oval:mil.disa.stig.solaris11:def:60
if [ ! -f /etc/default/keyserv ]; then echo "PASS"; exit 0; fi
if [ $(grep -E "^\\s*ENABLE_NOBODY_KEYS=\\S+" /etc/default/keyserv | awk -F'=' '{print $2}' | tr '[:upper:]' '[:lower:]' | grep -E "^[nno]$") ]; then echo "FAIL"; exit 1; fi
echo "PASS"; exit 0

Remediation

Determine if the rpc-authdes package is installed:

# pkg list solaris/legacy/security/rpc-authdes

If the output of this command is:

pkg list: no packages matching 'solaris/legacy/security/rpc-authdes' installed

no further action is required.

The root role is required.

Modify the /etc/default/keyserv file.

# pfedit /etc/default/keyserv

Locate the line:

#ENABLE_NOBODY_KEYS=YES

Change it to:

ENABLE_NOBODY_KEYS=NO