Guide to the Secure Configuration of Red Hat Enterprise Linux 7
Rules, Groups, and Values defined within the XCCDF Benchmark
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Updating Software
The <code>yum</code> command line tool is used to install and update software packages. The system also provides a graphical software update tool i...Group -
Ensure yum Removes Previous Package Versions
<code>yum</code> should be configured to remove previous software components after new versions have been installed. To configure <code>yum</code> ...Rule Low Severity -
Ensure gpgcheck Enabled In Main yum Configuration
The <code>gpgcheck</code> option controls whether RPM packages' signatures are always checked prior to installation. To configure yum to check pack...Rule High Severity -
Ensure gpgcheck Enabled for Local Packages
<code>yum</code> should be configured to verify the signature(s) of local packages prior to installation. To configure <code>yum</code> to verify s...Rule High Severity -
Ensure gpgcheck Enabled for All yum Package Repositories
To ensure signature checking is not disabled for any repos, remove any lines from files in <code>/etc/yum.repos.d</code> of the form: <pre>gpgcheck...Rule High Severity -
Ensure gpgcheck Enabled for Repository Metadata
Verify the operating system prevents the installation of patches, service packs, device drivers, or operating system components of local packages w...Rule High Severity -
Ensure Red Hat GPG Key Installed
To ensure the system can cryptographically verify base software packages come from Red Hat (and to connect to the Red Hat Network to receive them),...Rule High Severity -
Configure PAMs passwd Module To Implement system-auth Substack When Changing Passwords
Verify that pam is configured to use <code>/etc/pam.d/system-auth</code> when changing passwords. Look for the following line in <code>/etc/pam.d/p...Rule Medium Severity -
Ensure Software Patches Installed
If the system is joined to the Red Hat Network, a Red Hat Satellite Server, or a yum server, run the following command to install updates: <pre>$ ...Rule Medium Severity -
Account and Access Control
In traditional Unix security, if an attacker gains shell access to a certain login account, they can perform any action or access any file to which...Group -
Authselect profile
Specify the authselect profile to selectValue -
Ensure system-auth and password-auth files are symbolic links pointing to system-auth-local and password-auth-local
Red Hat Enterprise Linux 7 must be configured to prevent overwriting of custom authentication configuration settings by the authconfig utility. Thi...Rule Medium Severity -
Warning Banners for System Accesses
Each system should expose as little information about itself as possible. <br><br> System banners, which are typically displayed just before a logi...Group -
Login Banner Verbiage
Enter an appropriate login banner for your organization. Please note that new lines must be expressed by the '\n' character and special characters ...Value -
MotD Banner Verbiage
Enter an appropriate login banner for your organization. Please note that new lines must be expressed by the '\n' character and special characters ...Value -
Remote Login Banner Verbiage
Enter an appropriate login banner for your organization. Please note that new lines must be expressed by the '\n' character and special characters ...Value -
Modify the System Login Banner
To configure the system login banner edit <code>/etc/issue</code>. Replace the default text with a message compliant with the local site policy or...Rule Medium Severity -
Verify permissions on System Login Banner
To properly set the permissions of/etc/issue, run the command:$ sudo chmod 0644 /etc/issue
Rule Medium Severity -
Configure Screen Locking
When a user must temporarily leave an account logged-in, screen locking should be employed to prevent passersby from abusing the account. User educ...Group -
Modify the System Login Banner for Remote Connections
To configure the system login banner edit <code>/etc/issue.net</code>. Replace the default text with a message compliant with the local site policy...Rule Medium Severity
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