4.1.1.4 Ensure audit_backlog_limit is sufficient

Information

The backlog limit has a default setting of 64 during boot if audit=1, then the backlog will hold 64 records. If more that 64 records are created during boot, auditd records will be lost and potential malicious activity could go undetected.

Solution

Edit /etc/default/grub and add audit_backlog_limit=<BACKLOG SIZE> to GRUB_CMDLINE_LINUX: Example: GRUB_CMDLINE_LINUX="audit_backlog_limit=8192" Run the following command to update the grub2 configuration: # grub2-mkconfig -o /boot/grub2/grub.cfg

See Also

https://workbench.cisecurity.org/files/2608

Item Details

Category: AUDIT AND ACCOUNTABILITY

References: 800-53|AU-3, 800-53|AU-12, CSCv7|6.2

Plugin: Unix

Control ID: 5d8526625ad9117811aa1b781b190bd5b7dea48f8165b854aa25dc59efc1a13f