CIS SUSE Linux Enterprise 12 Benchmark for Level 1 - Workstation
Rules and Groups employed by this XCCDF Profile
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Verify User Who Owns shadow File
To properly set the owner of/etc/shadow
, run the command:$ sudo chown root /etc/shadow
Rule Medium Severity -
Verify Permissions on Backup group File
To properly set the permissions of/etc/group-
, run the command:$ sudo chmod 0644 /etc/group-
Rule Medium Severity -
Verify Permissions on Backup gshadow File
To properly set the permissions of/etc/gshadow-
, run the command:$ sudo chmod 0000 /etc/gshadow-
Rule Medium Severity -
Verify Permissions on Backup passwd File
To properly set the permissions of/etc/passwd-
, run the command:$ sudo chmod 0644 /etc/passwd-
Rule Medium Severity -
Verify Permissions on Backup shadow File
To properly set the permissions of/etc/shadow-
, run the command:$ sudo chmod 0000 /etc/shadow-
Rule Medium Severity -
Verify Permissions on group File
To properly set the permissions of/etc/group
, run the command:$ sudo chmod 0644 /etc/group
Rule Medium Severity -
Verify Permissions on gshadow File
To properly set the permissions of/etc/gshadow
, run the command:$ sudo chmod 0000 /etc/gshadow
Rule Medium Severity -
Verify Permissions on passwd File
To properly set the permissions of/etc/passwd
, run the command:$ sudo chmod 0644 /etc/passwd
Rule Medium Severity -
Verify Permissions on shadow File
To properly set the permissions of/etc/shadow
, run the command:$ sudo chmod 0640 /etc/shadow
Rule Medium Severity -
Restrict Dynamic Mounting and Unmounting of Filesystems
Linux includes a number of facilities for the automated addition and removal of filesystems on a running system. These facilities may be necessary...Group -
Disable Mounting of udf
To configure the system to prevent the <code>udf</code> kernel module from being loaded, add the following line to the file <code>/etc/modprobe.d/...Rule Low Severity -
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/fst...Group -
Add nodev Option to /dev/shm
The <code>nodev</code> mount option can be used to prevent creation of device files in <code>/dev/shm</code>. Legitimate character and block device...Rule Medium Severity -
Add noexec Option to /dev/shm
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/dev/shm</code>. It can be dangerous to allow...Rule Medium Severity -
Add nosuid Option to /dev/shm
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/dev/shm</code>. The SUID and SGID permissions s...Rule Medium Severity -
Add nodev Option to /home
The <code>nodev</code> mount option can be used to prevent device files from being created in <code>/home</code>. Legitimate character and block de...Rule Unknown Severity -
Add nodev Option to Removable Media Partitions
The <code>nodev</code> mount option prevents files from being interpreted as character or block devices. Legitimate character and block devices sho...Rule Medium Severity -
Add noexec Option to Removable Media Partitions
The <code>noexec</code> mount option prevents the direct execution of binaries on the mounted filesystem. Preventing the direct execution of binari...Rule Medium Severity -
Add nosuid Option to Removable Media Partitions
The <code>nosuid</code> mount option prevents set-user-identifier (SUID) and set-group-identifier (SGID) permissions from taking effect. These perm...Rule Medium Severity -
Add nodev Option to /tmp
The <code>nodev</code> mount option can be used to prevent device files from being created in <code>/tmp</code>. Legitimate character and block dev...Rule Medium Severity -
Add noexec Option to /tmp
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/tmp</code>. Add the <code>noexec</code> opti...Rule Medium Severity -
Add nosuid Option to /tmp
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/tmp</code>. The SUID and SGID permissions should...Rule Medium Severity -
Add nodev Option to /var/tmp
The <code>nodev</code> mount option can be used to prevent device files from being created in <code>/var/tmp</code>. Legitimate character and block...Rule Medium Severity -
Add noexec Option to /var/tmp
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/var/tmp</code>. Add the <code>noexec</code> ...Rule Medium Severity -
Add nosuid Option to /var/tmp
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/var/tmp</code>. The SUID and SGID permissions sh...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 ar...Group -
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,...Group -
Disable core dump backtraces
The <code>ProcessSizeMax</code> option in <code>[Coredump]</code> section of <code>/etc/systemd/coredump.conf</code> specifies the maximum size in ...Rule Medium Severity -
Disable storing core dump
The <code>Storage</code> option in <code>[Coredump]</code> section of <code>/etc/systemd/coredump.conf</code> or <code>/etc/systemd/coredump.conf.d...Rule Medium Severity -
Disable Core Dumps for All Users
To disable core dumps for all users, add the following line to <code>/etc/security/limits.conf</code>, or to a file within the <code>/etc/security/...Rule Medium Severity -
Disable Core Dumps for SUID programs
To set the runtime status of the <code>fs.suid_dumpable</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w fs.suid_dumpable=...Rule Medium Severity -
Enable ExecShield
ExecShield describes kernel features that provide protection against exploitation of memory corruption errors such as buffer overflows. These featu...Group -
Enable Randomized Layout of Virtual Address Space
To set the runtime status of the <code>kernel.randomize_va_space</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.r...Rule Medium Severity -
Enable Execute Disable (XD) or No Execute (NX) Support on x86 Systems
Recent processors in the x86 family support the ability to prevent code execution on a per memory page basis. Generically and on AMD processors, th...Group -
Enable NX or XD Support in the BIOS
Reboot the system and enter the BIOS or Setup configuration menu. Navigate the BIOS configuration menu and make sure that the option is enabled. Th...Rule Medium Severity -
Install PAE Kernel on Supported 32-bit x86 Systems
Systems that are using the 64-bit x86 kernel package do not need to install the kernel-PAE package because the 64-bit x86 kernel already includes t...Rule Unknown Severity -
Services
The best protection against vulnerable software is running less software. This section describes how to review the software which SUSE Linux Enterp...Group -
Cron and At Daemons
The cron and at services are used to allow commands to be executed at a later time. The cron service is required by almost all systems to perform n...Group -
Install the cron service
The Cron service should be installed.Rule Medium Severity -
Enable cron Service
The <code>crond</code> service is used to execute commands at preconfigured times. It is required by almost all systems to perform necessary mainte...Rule Medium Severity -
Verify Group Who Owns cron.d
To properly set the group owner of/etc/cron.d
, run the command:$ sudo chgrp root /etc/cron.d
Rule Medium Severity -
Verify Group Who Owns cron.daily
To properly set the group owner of/etc/cron.daily
, run the command:$ sudo chgrp root /etc/cron.daily
Rule Medium Severity -
Verify Group Who Owns cron.hourly
To properly set the group owner of/etc/cron.hourly
, run the command:$ sudo chgrp root /etc/cron.hourly
Rule Medium Severity -
Verify Group Who Owns cron.monthly
To properly set the group owner of/etc/cron.monthly
, run the command:$ sudo chgrp root /etc/cron.monthly
Rule Medium Severity -
Verify Group Who Owns cron.weekly
To properly set the group owner of/etc/cron.weekly
, run the command:$ sudo chgrp root /etc/cron.weekly
Rule Medium Severity -
Verify Group Who Owns Crontab
To properly set the group owner of/etc/crontab
, run the command:$ sudo chgrp root /etc/crontab
Rule Medium Severity -
Verify Owner on cron.d
To properly set the owner of/etc/cron.d
, run the command:$ sudo chown root /etc/cron.d
Rule Medium Severity -
Verify Owner on cron.daily
To properly set the owner of/etc/cron.daily
, run the command:$ sudo chown root /etc/cron.daily
Rule Medium Severity -
Verify Owner on cron.hourly
To properly set the owner of/etc/cron.hourly
, run the command:$ sudo chown root /etc/cron.hourly
Rule Medium Severity -
Verify Owner on cron.monthly
To properly set the owner of/etc/cron.monthly
, run the command:$ sudo chown root /etc/cron.monthly
Rule Medium Severity
Node 2
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