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PCI-DSS v3.2.1 Control Baseline for SUSE Linux enterprise 12

Rules and Groups employed by this XCCDF Profile

  • System Settings

    Contains rules that check correct system settings.
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  • Installing and Maintaining Software

    The following sections contain information on security-relevant choices during the initial operating system installation process and the setup of software updates.
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  • System and Software Integrity

    System and software integrity can be gained by installing antivirus, increasing system encryption strength with FIPS, verifying installed software, enabling SELinux, installing an Intrusion Prevent...
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  • Disable Prelinking

    The prelinking feature changes binaries in an attempt to decrease their startup time. In order to disable it, change or add the following line inside the file <code>/etc/sysconfig/prelink</code>: <...
    Rule Medium Severity
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  • Software Integrity Checking

    Both the AIDE (Advanced Intrusion Detection Environment) software and the RPM package management system provide mechanisms for verifying the integrity of installed software. AIDE uses snapshots of ...
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  • Verify Integrity with RPM

    The RPM package management system includes the ability to verify the integrity of installed packages by comparing the installed files with information about the files taken from the package metadat...
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  • Verify File Hashes with RPM

    Without cryptographic integrity protections, system executables and files can be altered by unauthorized users without detection. The RPM package management system can check the hashes of installed...
    Rule High Severity
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  • Verify and Correct Ownership with RPM

    The RPM package management system can check file ownership permissions of installed software packages, including many that are important to system security. After locating a file with incorrect per...
    Rule High Severity
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  • Verify and Correct File Permissions with RPM

    The RPM package management system can check file access permissions of installed software packages, including many that are important to system security. Verify that the file permissions of system ...
    Rule High Severity
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  • Verify Integrity with AIDE

    AIDE conducts integrity checks by comparing information about files with previously-gathered information. Ideally, the AIDE database is created immediately after initial system configuration, and t...
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  • Install AIDE

    The aide package can be installed with the following command: 
    $ sudo zypper install aide
    Rule Medium Severity
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  • Build and Test AIDE Database

    Run the following command to generate a new database: <pre>$ sudo /usr/bin/aide --init</pre> By default, the database will be written to the file <code>/var/lib/aide/aide.db.new</code>. Storing...
    Rule Medium Severity
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  • Configure Periodic Execution of AIDE

    At a minimum, AIDE should be configured to run a weekly scan. To implement a daily execution of AIDE at 4:05am using cron, add the following line to <code>/etc/crontab</code>: <pre>05 4 * * * root ...
    Rule Medium Severity
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  • System Cryptographic Policies

    Linux has the capability to centrally configure cryptographic polices. The command <code>update-crypto-policies</code> is used to set the policy applicable for the various cryptographic back-ends, ...
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  • Configure Libreswan to use System Crypto Policy

    Crypto Policies provide a centralized control over crypto algorithms usage of many packages. Libreswan is supported by system crypto policy, but the Libreswan configuration may be set up to ignore ...
    Rule High Severity
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  • Configure OpenSSL library to use System Crypto Policy

    Crypto Policies provide a centralized control over crypto algorithms usage of many packages. OpenSSL is supported by crypto policy, but the OpenSSL configuration may be set up to ignore it. To chec...
    Rule Medium Severity
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  • Configure SSH to use System Crypto Policy

    Crypto Policies provide a centralized control over crypto algorithms usage of many packages. SSH is supported by crypto policy, but the SSH configuration may be set up to ignore it. To check that C...
    Rule Medium Severity
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  • Endpoint Protection Software

    Endpoint protection security software that is not provided or supported by Red Hat can be installed to provide complementary or duplicative security capabilities to those provided by the base pla...
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  • Install Intrusion Detection Software

    The base SUSE Linux Enterprise 12 platform already includes a sophisticated auditing system that can detect intruder activity, as well as SELinux, which provides host-based intrusion prevention cap...
    Rule High Severity
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  • McAfee Endpoint Security Software

    In DoD environments, McAfee Host-based Security System (HBSS) and VirusScan Enterprise for Linux (VSEL) is required to be installed on all systems.
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  • McAfee Host-Based Intrusion Detection Software (HBSS)

    McAfee Host-based Security System (HBSS) is a suite of software applications used to monitor, detect, and defend computer networks and systems.
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  • Install the Host Intrusion Prevention System (HIPS) Module

    Install the McAfee Host Intrusion Prevention System (HIPS) Module if it is absolutely necessary. If SELinux is enabled, do not install or enable this module.
    Rule Medium Severity
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  • GNOME Desktop Environment

    GNOME is a graphical desktop environment bundled with many Linux distributions that allow users to easily interact with the operating system graphically rather than textually. The GNOME Graphical D...
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  • Make sure that the dconf databases are up-to-date with regards to respective keyfiles

    By default, DConf uses a binary database as a data backend. The system-level database is compiled from keyfiles in the /etc/dconf/db/ directory by the <pre>dconf update</pre> command. More specific...
    Rule High Severity
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  • Configure GNOME Screen Locking

    In the default GNOME3 desktop, the screen can be locked by selecting the user name in the far right corner of the main panel and selecting <b>Lock</b>. <br> <br> The following sections deta...
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  • Enable GNOME3 Screensaver Idle Activation

    To activate the screensaver in the GNOME3 desktop after a period of inactivity, add or set <code>idle-activation-enabled</code> to <code>true</code> in <code>/etc/dconf/db/local.d/00-security-setti...
    Rule Medium Severity
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  • Set GNOME3 Screensaver Inactivity Timeout

    The idle time-out value for inactivity in the GNOME3 desktop is configured via the <code>idle-delay</code> setting must be set under an appropriate configuration file(s) in the <code>/etc/dconf/db/...
    Rule Medium Severity
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  • Enable GNOME3 Screensaver Lock After Idle Period

    To activate locking of the screensaver in the GNOME3 desktop when it is activated, run the following command to configure the SUSE operating system to allow the user to lock the GUI: <pre>gsetting...
    Rule Medium Severity
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  • Implement Blank Screensaver

    On SUSE users should set the screensaver to use publicly viewable images or blank screen by doing the following: Find the Settings menu and then navigate to the Background selection section <co...
    Rule Medium Severity
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  • Ensure Users Cannot Change GNOME3 Session Idle Settings

    If not already configured, ensure that users cannot change GNOME3 session idle settings by adding <code>/org/gnome/desktop/session/idle-delay</code> to <code>/etc/dconf/db/local.d/locks/00-security...
    Rule Medium Severity
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  • Updating Software

    The <code>zypper</code> command line tool is used to install and update software packages. The system also provides a graphical software update tool in the <b>System</b> menu, in the <b>Administrat...
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  • Ensure gpgcheck Enabled In Main zypper Configuration

    The <code>gpgcheck</code> option controls whether RPM packages' signatures are always checked prior to installation. To configure zypper to check package signatures before installing them, ensure t...
    Rule High Severity
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  • Ensure gpgcheck Enabled for All zypper Package Repositories

    To ensure signature checking is not disabled for any repos, remove any lines from files in /etc/yum.repos.d of the form: 
    gpgcheck=0
    Rule High Severity
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  • Ensure SUSE GPG Key Installed

    To ensure the system can cryptographically verify base software packages come from SUSE (and to connect to the SUSE to receive them), the SUSE GPG key must properly be installed. To install the SUS...
    Rule High Severity
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  • Ensure Software Patches Installed

    If the system is configured for online updates, invoking the following command will list available security updates: <pre>$ sudo zypper refresh &amp;&amp; sudo zypper list-patches -g security</pre...
    Rule Medium Severity
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  • 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 that account has access. Therefore, making it mor...
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  • Protect Accounts by Configuring PAM

    PAM, or Pluggable Authentication Modules, is a system which implements modular authentication for Linux programs. PAM provides a flexible and configurable architecture for authentication, and it sh...
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  • Ensure PAM Displays Last Logon/Access Notification

    To configure the system to notify users of last logon/access using <code>pam_lastlog</code>, add or correct the <code>pam_lastlog</code> settings in <code>/etc/pam.d/login</code> to include <code>s...
    Rule Low Severity
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  • Set Lockouts for Failed Password Attempts

    The <code>pam_faillock</code> PAM module provides the capability to lock out user accounts after a number of failed login attempts. Its documentation is available in <code>/usr/share/doc/pam-VERSIO...
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  • Limit Password Reuse

    Do not allow users to reuse recent passwords. This can be accomplished by using the remember option for the pam_unix or pam_pwhistory PAM modules.
    Rule Medium Severity
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  • Set Deny For Failed Password Attempts

    The SUSE Linux Enterprise 12 operating system must lock an account after - at most - <xccdf-1.2:sub xmlns:xccdf-1.2="http://checklists.nist.gov/xccdf/1.2" idref="xccdf_org.ssgproject.content_value_...
    Rule Medium Severity
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  • Set Lockout Time for Failed Password Attempts using pam_tally2

    This rule configures the system to lock out accounts during a specified time period after a number of incorrect login attempts using pam_tally2.so.
    Rule Medium Severity
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  • Set Password Hashing Algorithm

    The system's default algorithm for storing password hashes in /etc/shadow is SHA-512. This can be configured in several locations.
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  • Set PAM's Common Authentication Hashing Algorithm

    The PAM system service can be configured to only store encrypted representations of passwords. In <code>/etc/pam.d/common-auth</code>, the <code>auth</code> section of the file controls which PAM m...
    Rule Medium Severity
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  • Set Password Hashing Algorithm in /etc/libuser.conf

    In <code>/etc/libuser.conf</code>, add or correct the following line in its <code>[defaults]</code> section to ensure the system will use the <xccdf-1.2:sub idref="xccdf_org.ssgproject.content_valu...
    Rule Medium Severity
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  • Set Password Hashing Algorithm in /etc/login.defs

    In <code>/etc/login.defs</code>, add or update the following line to ensure the system will use <xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_password_hashing_algorithm" use="legacy"...
    Rule Medium Severity
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  • Set PAM''s Password Hashing Algorithm

    The PAM system service can be configured to only store encrypted representations of passwords. In "/etc/pam.d/common-password", the <code>password</code> section of the file controls which PAM modu...
    Rule Medium Severity
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  • Protect Physical Console Access

    It is impossible to fully protect a system from an attacker with physical access, so securing the space in which the system is located should be considered a necessary step. However, there are some...
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  • 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 education and training is particularly important for s...
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  • Hardware Tokens for Authentication

    The use of hardware tokens such as smart cards for system login provides stronger, two-factor authentication than using a username and password. In Red Hat Enterprise Linux servers and workstation...
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