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Guide to the Secure Configuration of SUSE Linux Enterprise 15

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Force kernel panic on uncorrected MCEs

    A Machine Check Exception is an error generated by the CPU itdetects an error in itself, memory or I/O devices. These errors may be corrected and g...
    Rule Medium Severity
    Show

  • Ensure SMAP is not disabled during boot

    The SMAP is used to prevent the supervisor mode from unintentionally reading/writing into memory pages in the user space, it is enabled by default ...
    Rule Medium Severity
    Show

  • Ensure SMEP is not disabled during boot

    The SMEP is used to prevent the supervisor mode from executing user space code, it is enabled by default since Linux kernel 3.0. But it could be di...
    Rule Medium Severity
    Show

  • Configure the confidence in TPM for entropy

    The TPM security chip that is available in most modern systems has a hardware RNG. It is also used to feed the entropy pool, but generally not cred...
    Rule Low Severity
    Show

  • Disable merging of slabs with similar size

    The kernel may merge similar slabs together to reduce overhead and increase cache hotness of objects. Disabling merging of slabs keeps the slabs se...
    Rule Medium Severity
    Show

  • zIPL bootloader configuration

    During the boot process, the bootloader is responsible for starting the execution of the kernel and passing options to it. The default SUSE Linux E...
    Group
    Show

  • net.ipv6.conf.all.max_addresses

    Maximum number of autoconfigured IPv6 addresses
    Value
    Show

  • Configure Speculative Store Bypass Mitigation

    Certain CPUs are vulnerable to an exploit against a common wide industry wide performance optimization known as Speculative Store Bypass (SSB). In...
    Rule Medium Severity
    Show

  • Enforce Spectre v2 mitigation

    Spectre V2 is an indirect branch poisoning attack that can lead to data leakage. An exploit for Spectre V2 tricks the indirect branch predictor int...
    Rule High Severity
    Show

  • Ensure debug-shell service is not enabled during boot

    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
    Show

  • Non-UEFI GRUB2 bootloader configuration

    Non-UEFI GRUB2 bootloader configuration
    Group
    Show

  • Verify /boot/grub2/grub.cfg Group Ownership

    The file <code>/boot/grub2/grub.cfg</code> should be group-owned by the <code>root</code> group to prevent destruction or modification of the file....
    Rule Medium Severity
    Show

  • Verify /boot/grub2/grub.cfg User Ownership

    The file <code>/boot/grub2/grub.cfg</code> should be owned by the <code>root</code> user to prevent destruction or modification of the file. To pr...
    Rule Medium Severity
    Show

  • Verify /boot/grub2/grub.cfg Permissions

    File permissions for <code>/boot/grub2/grub.cfg</code> should be set to 600. To properly set the permissions of <code>/boot/grub2/grub.cfg</code>,...
    Rule Medium Severity
    Show

  • Set Boot Loader Password in grub2

    The grub2 boot loader should have a superuser account and password protection enabled to protect boot-time settings. <br><br> Since plaintext passw...
    Rule High Severity
    Show

  • UEFI GRUB2 bootloader configuration

    UEFI GRUB2 bootloader configuration
    Group
    Show

  • Protect Random-Number Entropy Pool

    The I/O operations of the Linux kernel block layer due to their inherently unpredictable execution times have been traditionally considered as a re...
    Group
    Show

  • 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
    Show

  • Kernel Configuration

    Contains rules that check the kernel configuration that was used to build it.
    Group
    Show

  • Hash function for kernel module signing

    The hash function to use when signing modules during kernel build process.
    Value
    Show

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