SV-226995r603265: The SSH daemon must not permit GSSAPI authentication unless needed. | Solaris 10 SPARC STIG SCAP Benchmark

Loading benchmark…

Assessment Title

Rule Text

The SSH daemon must not permit GSSAPI authentication unless needed.

Description

Discussion Text

GSSAPI authentication is used to provide additional authentication mechanisms to applications. Allowing GSSAPI authentication through SSH exposes the system's GSSAPI to remote hosts, increasing the attack surface of the system. GSSAPI authentication must be disabled unless needed.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366SV-26766V-22473

References

DPMS Target Solaris 10 SPARC DISA DPMS Target Solaris 10 SPARC 4060

Checks

DISA STIG (Manual Reference)

Ask the SA if GSSAPI authentication is used for SSH authentication to the system.  If so, this is not applicable.

Check the SSH daemon configuration for the GSSAPI authentication setting.
# grep -i GSSAPIAuthentication /etc/ssh/sshd_config | grep -v '^#' 
If no lines are returned, or the setting is set to yes, this is a finding.

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.solaris11:def:331
# The SSH daemon must not permit GSSAPI authentication unless needed.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Check "GSSAPIAuthentication" is set to "no" in /etc/ssh/sshd_config.
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  grep -Pq '^[ 	]*[Gg][Ss][Ss][Aa][Pp][Ii][Aa][Uu][Tt][Hh][Ee][Nn][Tt][Ii][Cc][Aa][Tt][Ii][Oo][Nn][ 	]+no[ 	]*$' '/etc/ssh/sshd_config' &>/dev/null
}

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.solaris11:def:331
if [ ! -f /etc/ssh/sshd_config ]; then echo "PASS"; exit 0; fi; \
grep -q "^[ \t]*[Gg][Ss][Ss][Aa][Pp][Ii][Aa][Uu][Tt][Hh][Ee][Nn][Tt][Ii][Oo][Cc][Aa][Tt][Ii][Oo][Nn][ \t]*no[ \t]*$" /etc/ssh/sshd_config || echo "FAIL"; exit 0

Remediation

Edit the SSH daemon configuration and set (add if necessary) a GSSAPIAuthentication directive set to no.