Add SCE check for ufw_rate_limit for Ubuntu

[mpurg]

Description:

• Added SCE check for rule ufw_rate_limit for Ubuntu (STIG rules UBTU-20-010446, UBTU-22-251025)

[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.

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[github-actions]

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

ubuntu2004 (from CTF) Environment (using Fedora as testing environment)

Fedora Testing Environment

Oracle Linux 8 Environment

[github-actions]

This datastream diff is auto generated by the check Compare DS/Generate Diff

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New content has different text for rule 'xccdf_org.ssgproject.content_rule_ufw_rate_limit'.
--- xccdf_org.ssgproject.content_rule_ufw_rate_limit
+++ xccdf_org.ssgproject.content_rule_ufw_rate_limit
@@ -5,6 +5,25 @@
 [description]:
 The operating system must configure the uncomplicated firewall to
 rate-limit impacted network interfaces.
+
+Check all the services listening to the ports with the following
+command:
+$ sudo ss -l46ut
+Netid State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
+tcp LISTEN 0 128 [::]:ssh [::]:*
+
+For each entry, verify that the ufw is configured to rate limit the
+service ports with the following command:
+$ sudo ufw status
+
+If any port with a state of "LISTEN" is not marked with the "LIMIT"
+action, run the following command, replacing "service" with the
+service that needs to be rate limited:
+$ sudo ufw limit "service"
+
+Rate-limiting can also be done on an interface. An example of adding
+a rate-limit on the eth0 interface follows:
+$ sudo ufw limit in on eth0
 
 [reference]:
 CCI-002385

[github-actions]

🤖 A k8s content image for this PR is available at:
ghcr.io/complianceascode/k8scontent:11998
This image was built from commit: bdb698b

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:11998

Otherwise deploy the content and operator together by checking out ComplianceAsCode/compliance-operator and:
CONTENT_IMAGE=ghcr.io/complianceascode/k8scontent:11998 make deploy-local

[codeclimate]

Code Climate has analyzed commit bdb698b 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!