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Guide to the Secure Configuration of Oracle Linux 9

Rules, Groups, and Values defined within the XCCDF Benchmark

  • L1TF vulnerability mitigation

    Defines the L1TF vulneratility mitigations to employ.
    Value
    Show

  • MDS vulnerability mitigation

    Defines the MDS vulneratility mitigation to employ.
    Value
    Show

  • Confidence level on Hardware Random Number Generator

    Defines the level of trust on the hardware random number generators available in the system and the percentage of entropy to credit.
    Value
    Show

  • Spec Store Bypass Mitigation

    This controls how the Speculative Store Bypass (SSB) vulnerability is mitigated.
    Value
    Show

  • Disable Recovery Booting

    Oracle Linux 9 systems support an "recovery boot" option that can be used to prevent services from being started. The <code>GRUB_DISABLE_RECOVERY</code> configuration option in <code>/etc/default/g...
    Rule Medium Severity
    Show

  • IOMMU configuration directive

    On x86 architecture supporting VT-d, the IOMMU manages the access control policy between the hardware devices and some of the system critical units such as the memory. To ensure that <code>iomm...
    Rule Unknown Severity
    Show

  • 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 generate a check log entry, if an error cannot be c...
    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 since Linux kernel 3.7. But it could be disabled t...
    Rule Medium Severity
    Show

  • Enable randomization of the page allocator

    To enable randomization of the page allocator in the kernel, add the <code>page_alloc.shuffle=1</code> argument to the default GRUB 2 command line. To ensure that <code>page_alloc.shuffle=1</code> ...
    Rule Medium 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 separate and reduces the risk of kernel heap overflo...
    Rule Medium Severity
    Show

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