Align sshd_use_approved_kex_ordered_stig with Ubuntu STIG

[mpurg]

Description:

• Modify sshd_use_approved_kex_ordered_stig rule to better align with Ubuntu STIG (UBTU-20-010045, UBTU-22-255060)
• Switch to checking the whole set of algorithms instead of just a subset
• Extend OVAL check to allow distributed configs
• Analogous to Align sshd_use_approved_macs_ordered_stig with Ubuntu STIG #11853

Rationale:

• Checking just for a subset does not meet the requirement of having the algorithms in the exact same order (as specified in the STIG), because it is possible to specify only the last algorithm, which is effectively the same as specifying them in the wrong order

[openshift-ci]

Hi @mpurg. Thanks for your PR.

I'm waiting for a ComplianceAsCode member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[github-actions]

Start a new ephemeral environment with changes proposed in this pull request:

rhel8 (from CTF) Environment (using Fedora as testing environment)

Fedora Testing Environment

Oracle Linux 8 Environment

[github-actions]

🤖 A k8s content image for this PR is available at:
ghcr.io/complianceascode/k8scontent:11987
This image was built from commit: 3a14850

Click here to see how to deploy it

If you alread have Compliance Operator deployed:
utils/build_ds_container.py -i ghcr.io/complianceascode/k8scontent:11987

Otherwise deploy the content and operator together by checking out ComplianceAsCode/compliance-operator and:
CONTENT_IMAGE=ghcr.io/complianceascode/k8scontent:11987 make deploy-local

[codeclimate]

Code Climate has analyzed commit 3a14850 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 59.4% (0.0% change).

View more on Code Climate.

[dodys]

lgtm, thanks!