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Guide to the Secure Configuration of Red Hat Enterprise Linux 8

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Detect stack corruption on calls to schedule()

    This option checks for a stack overrun on calls to schedule(). If the stack end location is found to be overwritten always panic as the content of ...
    Rule Medium Severity
    Show

  • Enable seccomp to safely compute untrusted bytecode

    This kernel feature is useful for number crunching applications that may need to compute untrusted bytecode during their execution. By using pipes ...
    Rule Medium Severity
    Show

  • Enable use of Berkeley Packet Filter with seccomp

    Enable tasks to build secure computing environments defined in terms of Berkeley Packet Filter programs which implement task-defined system call fi...
    Rule Medium Severity
    Show

  • Enable different security models

    This allows you to choose different security modules to be configured into your kernel. The configuration that was used to build kernel is availab...
    Rule Medium Severity
    Show

  • Enable Yama support

    This enables support for LSM module Yama, which extends DAC support with additional system-wide security settings beyond regular Linux discretionar...
    Rule Medium Severity
    Show

  • Harden slab freelist metadata

    This feature protects integrity of the allocator's metadata. This configuration is available from kernel 4.14. The configuration that was used to ...
    Rule Medium Severity
    Show

  • mcelog_exec_scripts SELinux Boolean

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

  • Disallow merge of slab caches

    For reduced kernel memory fragmentation, slab caches can be merged when they share the same size and other characteristics. This carries a risk of ...
    Rule Medium Severity
    Show

  • Enable SLUB debugging support

    SLUB has extensive debug support features and this allows the allocator validation checking to be enabled. The configuration that was used to buil...
    Rule Medium Severity
    Show

  • Stack Protector buffer overlow detection

    This feature puts, at the beginning of functions, a canary value on the stack just before the return address, and validates the value just before a...
    Rule Medium Severity
    Show

  • Strong Stack Protector

    This features adds canary logic protection to more kinds of vulnerable functions than CONFIG_STACKPROTECTOR, but not to all functions so that perfo...
    Rule Medium Severity
    Show

  • Make the kernel text and rodata read-only

    When set, kernel 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

  • 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

  • Ensure rsyslog Default File Permissions Configured

    rsyslog will create logfiles that do not already exist on the system. This settings controls what permissions will be applied to these newly create...
    Rule Medium Severity
    Show

  • Configure Logwatch on the Central Log Server

    Is this system the central log server? If so, edit the file /etc/logwatch/conf/logwatch.conf as shown below.
    Group
    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

  • 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

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