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Guide to the Secure Configuration of Red Hat Enterprise Linux 9

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Enable randomization of the page allocator in zIPL

    To enable the randomization of the page allocator in the kernel, check that all boot entries in <code>/boot/loader/entries/*.conf</code> have <code...
    Rule Medium Severity
  • Enable page allocator poisoning in zIPL

    To enable poisoning of free pages, check that all boot entries in <code>/boot/loader/entries/*.conf</code> have <code>page_poison=1</code> included...
    Rule Medium Severity
  • Enable SLUB/SLAB allocator poisoning in zIPL

    To enable poisoning of SLUB/SLAB objects, check that all boot entries in <code>/boot/loader/entries/*.conf</code> have <code>slub_debug=P</code> in...
    Rule Medium Severity
  • Ensure debug-shell service is not enabled in zIPL

    systemd's <code>debug-shell</code> service is intended to diagnose systemd related boot issues with various <code>systemctl</code> commands. Once e...
    Rule Medium Severity
  • Ensure Solid State Drives Do Not Contribute To Random-Number Entropy Pool

    For each solid-state drive on the system, run:
     # echo 0 > /sys/block/DRIVE/queue/add_random
    Rule Medium Severity

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