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Guide to the Secure Configuration of Fedora

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Make the module text and rodata read-only

    When set, module text and rodata memory will be made read-only, and non-text memory will be made non-executable. This configuration is available fr...
    Rule Medium Severity
    Show

  • Enable TCP/IP syncookie support

    Normal TCP/IP networking is open to an attack known as SYN flooding. It is denial-of-service attack that prevents legitimate remote users from bein...
    Rule Medium Severity
    Show

  • Unmap kernel when running in userspace (aka KAISER)

    Speculation attacks against some high-performance processors can be used to bypass MMU permission checks and leak kernel data to userspace. This ca...
    Rule Medium Severity
    Show

  • authlogin_yubikey SELinux Boolean

    default - Default SELinux boolean setting.
    on - SELinux boolean is enabled.
    off - SELinux boolean is disabled.
    Value
    Show

  • User a virtually-mapped stack

    Enable this to use virtually-mapped kernel stacks with guard pages. This configuration is available from kernel 4.9. The configuration that was us...
    Rule Medium Severity
    Show

  • Disable x86 vsyscall emulation

    Disabling it is roughly equivalent to booting with vsyscall=none, except that it will also disable the helpful warning if a program tries to use a ...
    Rule Low Severity
    Show

  • Kernel GCC plugin configuration

    Contains rules that check the configuration of GCC plugins used by the compiler
    Group
    Show

  • Generate some entropy during boot and runtime

    Instrument some kernel code to extract some entropy from both original and artificially created program state. This will help especially embedded s...
    Rule Medium Severity
    Show

  • Randomize layout of sensitive kernel structures

    Randomize at compile-time the layouts of structures that are entirely function pointers (and have not been manually annotated with __no_randomize_l...
    Rule Medium Severity
    Show

  • Poison kernel stack before returning from syscalls

    This option makes the kernel erase the kernel stack before returning from system calls. This has the effect of leaving the stack initialized to the...
    Rule Medium Severity
    Show

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