AlmaLinux OS 9 must enable auditing of processes that start prior to the audit daemon.

STIG ID: ALMA-09-047980  |  SRG: SRG-OS-000037-GPOS-00015 |  Severity: medium |  CCI: CCI-000130,CCI-000135,CCI-000169,CCI-002884,CCI-000172,CCI-001464 |  Vulnerability Id: V-269474

Vulnerability Discussion

Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one.

If auditing is enabled late in the startup process, the actions of some startup processes may not be audited. Some audit systems also maintain state information only available if auditing is enabled before a given process is created.

Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000473-GPOS-00218, SRG-OS-000254-GPOS-00095

Check

Verify that GRUB 2 is configured to enable auditing of processes that start prior to the audit daemon with the following commands:

Check that the all GRUB2 entries have auditing enabled:

$ grubby --info=ALL | grep audit

args="ro audit=1 selinux=1 enforcing=1 audit_backlog_limit=8192 page_poison=1 vsyscall=none slub_debug=P pti=on iommu=force boot=UUID=eda01e9b-b7e1-431b-9549-16d5dcddf665 resume=/dev/mapper/luks-89bf0df8-547f-4613-af07-215e5f62e9a9 rd.luks.uuid=luks-8a7154ec-8eeb-46c8-9d75-66fc4b80d665 rd.lvm.lv=rootvg/root rd.luks.uuid=luks-89bf0df8-547f-4613-af07-215e5f62e9a9 rd.lvm.lv=rootvg/swap fips=1 rd.shell=0 quiet splash"

If "audit" is not set to "1" or is missing, this is a finding.

Check that auditing is enabled by default to persist in kernel updates:

$ grep audit /etc/default/grub

GRUB_CMDLINE_LINUX="audit=1 selinux=1 enforcing=1 audit_backlog_limit=8192 page_poison=1 vsyscall=none slub_debug=P pti=on iommu=force boot=UUID=eda01e9b-b7e1-431b-9549-16d5dcddf665 resume=/dev/mapper/luks-89bf0df8-547f-4613-af07-215e5f62e9a9 rd.luks.uuid=luks-8a7154ec-8eeb-46c8-9d75-66fc4b80d665 rd.lvm.lv=rootvg/root rd.luks.uuid=luks-89bf0df8-547f-4613-af07-215e5f62e9a9 rd.lvm.lv=rootvg/swap fips=1 rd.shell=0 quiet splash"

If "audit" is not set to "1", is missing, or is commented out, this is a finding.

Fix

Enable auditing of processes that start prior to the audit daemon with the following command:

$ grubby --update-kernel=ALL --args="audit=1"
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