DRAFT - Unclassified Information in Non-federal Information Systems and Organizations (NIST 800-171)
Rules and Groups employed by this XCCDF Profile
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Disable SCTP Support
The Stream Control Transmission Protocol (SCTP) is a transport layer protocol, designed to support the idea of message-oriented communication, with several streams of messages within one connection...Rule Medium Severity -
Disable TIPC Support
The Transparent Inter-Process Communication (TIPC) protocol is designed to provide communications between nodes in a cluster. To configure the system to prevent the <code>tipc</code> kernel module...Rule Low Severity -
Wireless Networking
Wireless networking, such as 802.11 (WiFi) and Bluetooth, can present a security risk to sensitive or classified systems and networks. Wireless networking hardware is much more likely to be include...Group -
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 ...Group -
Disable Bluetooth Kernel Module
The kernel's module loading system can be configured to prevent loading of the Bluetooth module. Add the following to the appropriate <code>/etc/modprobe.d</code> configuration file to prevent the ...Rule Medium Severity -
File Permissions and Masks
Traditional Unix security relies heavily on file and directory permissions to prevent unauthorized users from reading or modifying files to which they should not have access. <br> <br> Severa...Group -
Restrict Partition Mount Options
System partitions can be mounted with certain options that limit what files on those partitions can do. These options are set in the <code>/etc/fstab</code> configuration file, and can be used to m...Group -
Add nodev Option to /var/log/audit
The <code>nodev</code> mount option can be used to prevent device files from being created in <code>/var/log/audit</code>. Legitimate character and block devices should exist only in the <code>/dev...Rule Medium Severity -
Add noexec Option to /var/log/audit
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/var/log/audit</code>. Add the <code>noexec</code> option to the fourth column of <code>/etc/fs...Rule Medium Severity -
Add nosuid Option to /var/log/audit
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/var/log/audit</code>. The SUID and SGID permissions should not be required in directories containi...Rule Medium Severity -
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 are activated. These protections are applied at the ...Group -
Disable storing core dumps
To set the runtime status of the <code>kernel.core_pattern</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.core_pattern=|/bin/false</pre> To make sure that the sett...Rule Medium Severity -
Configure file name of core dumps
To set the runtime status of the <code>kernel.core_uses_pid</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.core_uses_pid=0</pre> To make sure that the setting is p...Rule Medium Severity -
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_restrict=1</pre> To make sure that the setting is...Rule Low Severity -
Disable Kernel Image Loading
To set the runtime status of the <code>kernel.kexec_load_disabled</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.kexec_load_disabled=1</pre> To make sure that the ...Rule Medium Severity -
Disallow kernel profiling by unprivileged users
To set the runtime status of the <code>kernel.perf_event_paranoid</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.perf_event_paranoid=2</pre> To make sure that the ...Rule Low Severity -
Restrict usage of ptrace to descendant processes
To set the runtime status of the <code>kernel.yama.ptrace_scope</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.yama.ptrace_scope=1</pre> To make sure that the sett...Rule Medium Severity -
Disable the use of user namespaces
To set the runtime status of the <code>user.max_user_namespaces</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w user.max_user_namespaces=0</pre> To make sure that the set...Rule Medium Severity -
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, only software developers legitimately need to acc...Group -
Disable acquiring, saving, and processing core dumps
Thesystemd-coredump.socketunit is a socket activation of thesystemd-coredump@.servicewhich processes core dumps. By masking the unit, core dump processing is disabled.Rule Medium Severity
Node 2
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