SV-35142r1: The SSH daemon must not allow rhosts RSA authentication. | HP-UX 11.23 Security Technical Implementation Guide

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Assessment Title

Rule Text

The SSH daemon must not allow rhosts RSA authentication.

Description

Discussion Text

If SSH permits rhosts RSA authentication, a user may be able to login based on the keys of the host originating the request and not any user-specific authentication..

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366

Additional Details

Responsibility

System Administrator

IA Controls

ECSC-1

References

DPMS Target HP-UX 11.23 DISA DPMS Target HP-UX 11.23 2170

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.hpux11:def:333
# The SSH daemon must not allow rhosts RSA authentication.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# RhostsRSAAuthentication Setting OK
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^[ 	]*[Rr][Hh][Oo][Ss][Tt][Ss][Rr][Ss][Aa][Aa][Uu][Tt][Hh][Ee][Nn][Tt][Ii][Cc][Aa][Tt][Ii][Oo][Nn][ 	]+(yes|no)[ 	]*$/\1/p' '/opt/ssh/etc/sshd_config') | grep -qxF 'no'
}

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.fso.hpux11:def:333
if [ ! -f "/opt/ssh/etc/sshd_config" ]; then echo "PASS"; exit 0; fi
grep -q "^[ \t]*[Rr][Hh][Oo][Ss][Tt][Ss][Rr][Ss][Aa][Uu][Tt][Hh][Ee][Nn][Tt][Ii][Cc][Aa][Tt][Ii][Oo][Nn][ \t]+no[ \t]*$" /opt/ssh/etc/sshd_config && echo "PASS" || echo "FAIL"; exit ${PIPESTATUS[0]}

Remediation

Edit the SSH daemon configuration and add or edit the RhostsRSAAuthentication setting value to no.   

Note that the above guidance applies exclusively to Protocol(s) 1/1,2/2,1 only. If using Protocol 2 only, the check is not applicable and further action is not required.