Guide to the Secure Configuration of Red Hat Enterprise Linux 8
Rules, Groups, and Values defined within the XCCDF Benchmark
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Disable Kernel mac80211 Module
To configure the system to prevent the <code>mac80211</code> kernel module from being loaded, add the following line to the file <code>/etc/modpro...Rule Medium Severity -
Disable WiFi or Bluetooth in BIOS
Some machines that include built-in wireless support offer the ability to disable the device through the BIOS. This is hardware-specific; consult y...Rule Unknown Severity -
Deactivate Wireless Network Interfaces
Deactivating wireless network interfaces should prevent normal usage of the wireless capability. <br><br> Configure the system to disable all wire...Rule Medium Severity -
Disable Unused Interfaces
Network interfaces expand the attack surface of the system. Unused interfaces are not monitored or controlled, and should be disabled. <br><br> If...Group -
Transport Layer Security Support
Support for Transport Layer Security (TLS), and its predecessor, the Secure Sockets Layer (SSL), is included in Red Hat Enterprise Linux in the Ope...Group -
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 t...Group -
Verify Permissions on Important Files and Directories
Permissions for many files on a system must be set restrictively to ensure sensitive information is properly protected. This section discusses impo...Group -
Ensure All World-Writable Directories Are Owned by root User
All directories in local partitions which are world-writable should be owned by root. If any world-writable directories are not owned by root, this...Rule Medium Severity -
Ensure All World-Writable Directories Are Owned by a System Account
All directories in local partitions which are world-writable should be owned by root or another system account. If any world-writable directories a...Rule Medium Severity -
Ensure All World-Writable Directories Are Group Owned by a System Account
All directories in local partitions which are world-writable should be group owned by root or another system account. If any world-writable directo...Rule Medium Severity -
Verify Permissions on /etc/audit/auditd.conf
To properly set the permissions of/etc/audit/auditd.conf, run the command:$ sudo chmod 0640 /etc/audit/auditd.conf
Rule Medium Severity -
Verify Permissions on /etc/audit/rules.d/*.rules
To properly set the permissions of/etc/audit/rules.d/*.rules, run the command:$ sudo chmod 0640 /etc/audit/rules.d/*.rules
Rule Medium Severity -
Verify that local System.map file (if exists) is readable only by root
Files containing sensitive informations should be protected by restrictive permissions. Most of the time, there is no need that these files need ...Rule Unknown Severity -
Ensure All SUID Executables Are Authorized
The SUID (set user id) bit should be set only on files that were installed via authorized means. A straightforward means of identifying unauthorize...Rule Medium Severity -
Ensure No World-Writable Files Exist
It is generally a good idea to remove global (other) write access to a file when it is discovered. However, check with documentation for specific a...Rule Medium Severity -
Ensure All Files Are Owned by a Group
If any file is not group-owned by a group present in /etc/group, the cause of the lack of group-ownership must be investigated. Following this, tho...Rule Medium Severity -
Ensure All Files Are Owned by a User
If any files are not owned by a user, then the cause of their lack of ownership should be investigated. Following this, the files should be deleted...Rule Medium Severity -
Verify User Who Owns Backup passwd File
To properly set the owner of/etc/passwd-, run the command:$ sudo chown root /etc/passwd-
Rule Medium Severity -
Verify Group Who Owns Backup shadow File
To properly set the owner of/etc/shadow-, run the command:$ sudo chown root /etc/shadow-
Rule Medium Severity -
Enable Kernel Parameter to Enforce DAC on Hardlinks
To set the runtime status of the <code>fs.protected_hardlinks</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w fs.protecte...Rule Medium Severity
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