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Guide to the Secure Configuration of Fedora

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Kernel GCC plugin configuration

    Contains rules that check the configuration of GCC plugins used by the compiler
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  • 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 systems where there is little 'natural' source of e...
    Rule Medium Severity
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  • 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_layout), or structures that have been explicitly ma...
    Rule Medium Severity
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  • 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 poison value, which both reduces the lifetime of ...
    Rule Medium Severity
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  • Force initialization of variables containing userspace addresses

    While the kernel is built with warnings enabled for any missed stack variable initializations, this warning is silenced for anything passed by reference to another function, under the occasionally ...
    Rule Medium Severity
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  • zero-init everything passed by reference

    Zero-initialize any stack variables that may be passed by reference and had not already been explicitly initialized. This configuration is available from kernel 4.14, but may be available if backpo...
    Rule Medium Severity
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  • Disable Wireless Through Software Configuration

    If it is impossible to remove the wireless hardware from the device in question, disable as much of it as possible through software. The following methods can disable software support for wireless ...
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  • Ensure rsyslog-gnutls is installed

    TLS protocol support for rsyslog is installed. The rsyslog-gnutls package can be installed with the following command: 
    $ sudo dnf install rsyslog-gnutls
    Rule Medium Severity
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  • Ensure rsyslog is Installed

    Rsyslog is installed by default. The rsyslog package can be installed with the following command: 
     $ sudo dnf install rsyslog
    Rule Medium Severity
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  • Enable rsyslog Service

    The <code>rsyslog</code> service provides syslog-style logging by default on Fedora. The <code>rsyslog</code> service can be enabled with the following command: <pre>$ sudo systemctl enable rsyslo...
    Rule Medium Severity
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  • Disable Logwatch on Clients if a Logserver Exists

    Does your site have a central logserver which has been configured to report on logs received from all systems? If so: <pre>$ sudo rm /etc/cron.daily/0logwatch</pre> If no logserver exists, it will ...
    Rule Unknown Severity
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  • 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.
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  • Configure Logwatch HostLimit Line

    On a central logserver, you want Logwatch to summarize all syslog entries, including those which did not originate on the logserver itself. The <code>HostLimit</code> setting tells Logwatch to repo...
    Rule Unknown Severity
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  • Configure Logwatch SplitHosts Line

    If <code>SplitHosts</code> is set, Logwatch will separate entries by hostname. This makes the report longer but significantly more usable. If it is not set, then Logwatch will not report which host...
    Rule Unknown Severity
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  • Ensure cron Is Logging To Rsyslog

    Cron logging must be implemented to spot intrusions or trace cron job status. If <code>cron</code> is not logging to <code>rsyslog</code>, it can be implemented by adding the following to the <i>RU...
    Rule Medium Severity
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  • Ensure Rsyslog Authenticates Off-Loaded Audit Records

    Rsyslogd is a system utility providing support for message logging. Support for both internet and UNIX domain sockets enables this utility to support both local and remote logging. Couple this uti...
    Rule Medium Severity
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  • Ensure System Log Files Have Correct Permissions

    The file permissions for all log files written by <code>rsyslog</code> should be set to 640, or more restrictive. These log files are determined by the second part of each Rule line in <code>/etc/r...
    Rule Medium Severity
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  • systemd-journald

    systemd-journald is a system service that collects and stores logging data. It creates and maintains structured, indexed journals based on logging information that is received from a variety of sou...
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  • Enable systemd-journald Service

    The <code>systemd-journald</code> service is an essential component of systemd. The <code>systemd-journald</code> service can be enabled with the following command: <pre>$ sudo systemctl enable sy...
    Rule Medium Severity
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  • Ensure journald is configured to compress large log files

    The journald system can compress large log files to avoid fill the system disk.
    Rule Medium Severity
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