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[Ubuntu2404] Template sysctl improvement #12970

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[Ubuntu2404] Template sysctl improvement #12970

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alanmcanonical
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Description:

  • Check & remediate /etc/ufw/sysctl.conf in template sysctl

Rationale:

  • Fix the Ubuntu2404 cis rule 3.3.9 Ensure suspicious packets are logged
  • The configuration file /etc/ufw/sysctl.conf will override the overlapped and active kernel parameter. We need to check this file and comment out any occurrence of sysctlvar
  • The existing {oval,bash,sce-bash} use the sysctlvar as part of their regex. The sysctlvar is organised using "." which can also represent the kernel format in /etcufw/sysctl.conf e.g. net.ipv4.conf.default.log_martians can capture literal string "net.ipv4.conf.default.log_martians" and also "net/ipv4/conf/default/log_martians" in /etc/ufw/sysctl.conf

@openshift-ci openshift-ci bot added the needs-ok-to-test Used by openshift-ci bot. label Feb 4, 2025
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openshift-ci bot commented Feb 4, 2025

Hi @alanmcanonical. 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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@dodys dodys self-assigned this Feb 5, 2025
@dodys dodys requested a review from a team February 5, 2025 08:26
@dodys dodys added Ubuntu Ubuntu product related. CIS CIS Benchmark related. labels Feb 5, 2025
@dodys dodys added this to the 0.1.77 milestone Feb 5, 2025
mpurg
mpurg suggested changes Feb 6, 2025
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Could you add a test for /etc/ufw/sysctl.conf?

@alanmcanonical
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Update the tests.

mpurg
mpurg reviewed Feb 7, 2025
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shared/templates/sysctl/bash.template
@@ -7,7 +7,9 @@
# Comment out any occurrences of {{{ SYSCTLVAR }}} from /etc/sysctl.d/*.conf files
{{% if product in [ "sle12", "sle15", "slmicro5"] %}}
for f in /etc/sysctl.d/*.conf /run/sysctl.d/*.conf /usr/local/lib/sysctl.d/*.conf /lib/sysctl.d/*.conf; do
{{% elif product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel8", "rhel9", "rhel10", "ubuntu2004", "ubuntu2204", "ubuntu2404"] %}}
{{% elif product in [ "ubuntu2004", "ubuntu2204", "ubuntu2404"] %}}
for f in /etc/sysctl.d/*.conf /run/sysctl.d/*.conf /usr/local/lib/sysctl.d/*.conf /etc/ufw/sysctl.conf; do
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Did you remove /usr/lib/sysctl.d/*.conf from ubuntu platforms on purpose?

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@alanmcanonical alanmcanonical Feb 7, 2025 •
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Not by intention, but the original branch that ubuntu will fall into doesn't have "/usr/lib/sysctl.d/*.conf" in file list. The original if-else branch for ref:

{{% else %}}
for f in /etc/sysctl.d/*.conf /run/sysctl.d/*.conf /usr/local/lib/sysctl.d/*.conf; do

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Sorry, you're absolutely right... I missed the "not" in the original elif statement.

@alanmcanonical
Clean up ufw sysctl.conf in all tests
0f356f9 
Created tests for ufw case
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codeclimate bot commented Feb 7, 2025

Code Climate has analyzed commit 0f356f9 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 61.9% (0.0% change).

View more on Code Climate.

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@mpurg mpurg mpurg requested changes

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