SV-235009r991589: The SUSE operating system SSH daemon private host key files must have mode 0640 or less permissive. | SUSE Linux Enterprise Server 15 STIG SCAP Benchmark

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Assessment Title

Rule Text

The SUSE operating system SSH daemon private host key files must have mode 0640 or less permissive.

Description

Discussion Text

If an unauthorized user obtains the private SSH host key file, the host could be impersonated.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366

References

DPMS Target SUSE Linux Enterprise Server 15 DISA DPMS Target SUSE Linux Enterprise Server 15 5274

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.

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:mil.disa.stig.sles15:def:221 compliance check
for file in /etc/ssh/ssh_host*key; do [ ! -e "$file" ] && continue; [ "$(stat -c "%a" "$file")" -gt 640 ] && { echo "FAIL"; exit 1; }; done && echo "PASS"; exit 0

Remediation

Configure the mode of the SUSE operating system SSH daemon private host key files under "/etc/ssh" to "0640" with the following command:

     > sudo chmod 0640 /etc/ssh/ssh_host*key