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Guide to the Secure Configuration of Red Hat Virtualization 4

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Add noexec Option to /boot

    The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/boot</code>. Add the <code>noexec</code> op...
    Rule Medium Severity
    Show

  • Add nodev Option to /dev/shm

    The <code>nodev</code> mount option can be used to prevent creation of device files in <code>/dev/shm</code>. Legitimate character and block device...
    Rule Medium Severity
    Show

  • Add nosuid Option to /dev/shm

    The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/dev/shm</code>. The SUID and SGID permissions s...
    Rule Medium Severity
    Show

  • Verify Permissions on Important Files and Directories Are Configured in /etc/permissions.local

    Permissions for many files on a system must be set restrictively to ensure sensitive information is properly protected. This section discusses the ...
    Group
    Show

  • Restrict Programs from Dangerous Execution Patterns

    The recommendations in this section are designed to ensure that the system's features to protect against potentially dangerous program execution ar...
    Group
    Show

  • Add grpquota Option to /home

    The <code>grpquota</code> mount option allows for the filesystem to have disk quotas configured. Add the <code>grpquota</code> option to the fourth...
    Rule Medium Severity
    Show

  • Add noexec Option to /home

    The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/home</code>. Add the <code>noexec</code> opt...
    Rule Medium Severity
    Show

  • Add nosuid Option to /home

    The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/home</code>. The SUID and SGID permissions shoul...
    Rule Medium Severity
    Show

  • Add usrquota Option to /home

    The <code>usrquota</code> mount option allows for the filesystem to have disk quotas configured. Add the <code>usrquota</code> option to the fourth...
    Rule Medium Severity
    Show

  • Add nodev Option to Removable Media Partitions

    The <code>nodev</code> mount option prevents files from being interpreted as character or block devices. Legitimate character and block devices sho...
    Rule Medium Severity
    Show

  • Add noexec Option to Removable Media Partitions

    The <code>noexec</code> mount option prevents the direct execution of binaries on the mounted filesystem. Preventing the direct execution of binari...
    Rule Medium Severity
    Show

  • Add nosuid Option to Removable Media Partitions

    The <code>nosuid</code> mount option prevents set-user-identifier (SUID) and set-group-identifier (SGID) permissions from taking effect. These perm...
    Rule Medium Severity
    Show

  • Add nosuid Option to /opt

    The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/opt</code>. The SUID and SGID permissions should...
    Rule Medium Severity
    Show

  • Add nosuid Option to /srv

    The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/srv</code>. The SUID and SGID permissions should...
    Rule Medium Severity
    Show

  • Add noexec Option to /var

    The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/var</code>. Add the <code>noexec</code> opti...
    Rule Medium Severity
    Show

  • kernel.unprivileged_bpf_disabled

    Prevent unprivileged processes from using the bpf() syscall.
    Value
    Show

  • Install libselinux Package

    The libselinux package can be installed with the following command: 
    $ sudo yum install libselinux
    Rule High Severity
    Show

  • daemons_dump_core SELinux Boolean

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

  • daemons_enable_cluster_mode SELinux Boolean

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

  • Disable the uvcvideo module

    If the device contains a camera it should be covered or disabled when not in use.
    Rule Medium Severity
    Show

  • Restrict Access to Kernel Message Buffer

    To set the runtime status of the <code>kernel.dmesg_restrict</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.dmesg...
    Rule Low Severity
    Show

  • Kernel panic on oops

    To set the runtime status of the <code>kernel.panic_on_oops</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.panic_...
    Rule Medium Severity
    Show

  • Disable Core Dumps

    A core dump file is the memory image of an executable program when it was terminated by the operating system due to errant behavior. In most cases,...
    Group
    Show

  • Disable core dump backtraces

    The <code>ProcessSizeMax</code> option in <code>[Coredump]</code> section of <code>/etc/systemd/coredump.conf</code> specifies the maximum size in ...
    Rule Medium Severity
    Show

  • Disable storing core dump

    The <code>Storage</code> option in <code>[Coredump]</code> sectionof <code>/etc/systemd/coredump.conf</code> can be set to <code>none</code> to dis...
    Rule Medium Severity
    Show

  • Disable Core Dumps for SUID programs

    To set the runtime status of the <code>fs.suid_dumpable</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w fs.suid_dumpable=...
    Rule Medium Severity
    Show

  • Daemon Umask

    The umask is a per-process setting which limits the default permissions for creation of new files and directories. The system includes initializati...
    Group
    Show

  • daemon umask

    Enter umask for daemons
    Value
    Show

  • Enable ExecShield

    ExecShield describes kernel features that provide protection against exploitation of memory corruption errors such as buffer overflows. These featu...
    Group
    Show

  • kernel.kptr_restrict

    Configure exposition of kernel pointer addresses
    Value
    Show

  • cobbler_can_network_connect SELinux Boolean

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

  • cobbler_use_cifs SELinux Boolean

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

  • Enable ExecShield via sysctl

    By default on Red Hat Virtualization 4 64-bit systems, ExecShield is enabled and can only be disabled if the hardware does not support ExecShield o...
    Rule Medium Severity
    Show

  • Restrict Exposed Kernel Pointer Addresses Access

    To set the runtime status of the <code>kernel.kptr_restrict</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.kptr_r...
    Rule Medium Severity
    Show

  • Enable Randomized Layout of Virtual Address Space

    To set the runtime status of the <code>kernel.randomize_va_space</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.r...
    Rule Medium Severity
    Show

  • Enable Execute Disable (XD) or No Execute (NX) Support on x86 Systems

    Recent processors in the x86 family support the ability to prevent code execution on a per memory page basis. Generically and on AMD processors, th...
    Group
    Show

  • Install PAE Kernel on Supported 32-bit x86 Systems

    Systems that are using the 64-bit x86 kernel package do not need to install the kernel-PAE package because the 64-bit x86 kernel already includes t...
    Rule Unknown Severity
    Show

  • Memory Poisoning

    Memory Poisoning consists of writing a special value to uninitialized or freed memory. Poisoning can be used as a mechanism to prevent leak of info...
    Group
    Show

  • slub_debug - debug options

    Defines the debug options to use in slub_debug kernel command line argument.
    Value
    Show

  • SELinux

    SELinux is a feature of the Linux kernel which can be used to guard against misconfigured or compromised programs. SELinux enforces the idea that p...
    Group
    Show

  • SELinux policy

    Type of policy in use. Possible values are: <br>targeted - Only targeted network daemons are protected. <br>strict - Full SELinux protection. <br>m...
    Value
    Show

  • SELinux state

    enforcing - SELinux security policy is enforced. <br>permissive - SELinux prints warnings instead of enforcing. <br>disabled - SELinux is fully dis...
    Value
    Show

  • cobbler_use_nfs SELinux Boolean

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

  • collectd_tcp_network_connect SELinux Boolean

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

  • Install policycoreutils Package

    The policycoreutils package can be installed with the following command: 
    $ sudo yum install policycoreutils
    Rule Low Severity
    Show

  • Ensure SELinux Not Disabled in the kernel arguments

    SELinux can be disabled at boot time by disabling it via a kernel argument. Remove any instances of <code>selinux=0</code> from the kernel argument...
    Rule Medium Severity
    Show

  • Ensure SELinux Not Disabled in /etc/default/grub

    SELinux can be disabled at boot time by an argument in <code>/etc/default/grub</code>. Remove any instances of <code>selinux=0</code> from the kern...
    Rule Medium Severity
    Show

  • Ensure No Device Files are Unlabeled by SELinux

    Device files, which are used for communication with important system resources, should be labeled with proper SELinux types. If any device files ca...
    Rule Medium Severity
    Show

  • Ensure No Daemons are Unconfined by SELinux

    Daemons for which the SELinux policy does not contain rules will inherit the context of the parent process. Because daemons are launched during sta...
    Rule Medium Severity
    Show

  • condor_tcp_network_connect SELinux Boolean

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

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