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Guide to the Secure Configuration of Alibaba Cloud Linux 3

Rules, Groups, and Values defined within the XCCDF Benchmark

  • 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
  • UEFI GRUB2 bootloader configuration

    UEFI GRUB2 bootloader configuration
    Group
  • Hash function for kernel module signing

    The hash function to use when signing modules during kernel build process.
    Value
  • Key and certificate for kernel module signing

    The private key and certificate to use when signing modules during kernel build process. On systems where the OpenSSL ENGINE_pkcs11 is functional —...
    Value
  • Kernel panic timeout

    The time, in seconds, to wait until a reboot occurs. If the value is <code>0</code> the system never reboots. If the value is less than <code>0</co...
    Value
  • Do not allow ACPI methods to be inserted/replaced at run time

    This debug facility allows ACPI AML methods to be inserted and/or replaced without rebooting the system. This configuration is available from kerne...
    Rule Low Severity
  • Disable kernel support for MISC binaries

    Enabling <code>CONFIG_BINFMT_MISC</code> makes it possible to plug wrapper-driven binary formats into the kernel. This is specially useful for prog...
    Rule Medium Severity
  • Enable support for BUG()

    Disabling this option eliminates support for BUG and WARN, reducing the size of your kernel image and potentially quietly ignoring numerous fatal c...
    Rule Medium Severity
  • Disable compatibility with brk()

    Enabling compatiliby with <code>brk()</code> allows legacy binaries to run (i.e. those linked against libc5). But this compatibility comes at the c...
    Rule Medium Severity
  • Disable the 32-bit vDSO

    Certain buggy versions of glibc (2.3.3) will crash if they are presented with a 32-bit vDSO that is not mapped at the address indicated in its segm...
    Rule Low Severity

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