Title

Ubuntu 24.04 LTS must initiate session audits at system startup. (Cat II impact)

Discussion

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.

Check Content

Verify that Ubuntu 24.04 LTS enables auditing at system startup in grub with the following command $ sudo grep "^\s*linux" /boot/grub/grub.cfg linux /vmlinuz-6.8.0-31-generic root=UUID=c92a542f-aee4-4af9-94b2-203624ccb8e3 ro audit=1 quiet splash $vt_handoff linux /vmlinuz-6.8.0-31-generic root=UUID=c92a542f-aee4-4af9-94b2-203624ccb8e3 ro recovery nomodeset dis_ucode_ldr audit=1 If any linux lines do not contain "audit=1", this is a finding.

Fix Text

Configure Ubuntu 24.04 LTS to produce audit records at system startup. Edit the "/etc/default/grub" file and add "audit=1" to the "GRUB_CMDLINE_LINUX" option so that the line looks like this: GRUB_CMDLINE_LINUX="audit=1" To update the grub config file, run: $ sudo update-grub

Additional Identifiers

Rule ID: SV-270676r1068360_rule

Vulnerability ID: V-270676

Group Title: SRG-OS-000254-GPOS-00095

Expert Comments

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