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oval:org.secpod.oval:def:55204
The Common Unix Print System (CUPS) provides the ability to print to both local and network printers. A system running CUPS can also accept print jobs from remote systems and print them to local printers. It also provides a web based remote administration capability. oval:org.secpod.oval:def:55190 Once the rsyslog package is installed it needs to be activated. If the rsyslog service is not activated the system will not have a syslog service running oval:org.secpod.oval:def:55119 The INFO parameter specifies that record login and logout activity will be logged. oval:org.secpod.oval:def:55205 Avahi is a free zeroconf implementation, including a system for multicast DNS/DNS-SD service discovery. Avahi allows programs to publish and discover services and hosts running on a local network with no specific configuration. For example, a user can plug a computer into a network and Avahi automat ... oval:org.secpod.oval:def:55208 Access permission for '/etc/cron.monthly' is set to appropriate values. oval:org.secpod.oval:def:55184 The kernel runtime parameter "kernel.randomize_va_space" should be set to "2". oval:org.secpod.oval:def:55216 The /etc/cron.daily directory contains system cron jobs that need to run on a daily basis. The files in this directory cannot be manipulated by the crontab command, but are instead edited by system administrators using a text editor. The commands below restrict read/write and search access to user a ... oval:org.secpod.oval:def:55191 max_log_file setting in /etc/audit/auditd.conf is set to at least a certain value oval:org.secpod.oval:def:55202 time is a network service that responds with the server's current date and time as a 32 bit integer. This service is intended for debugging and testing purposes. It is recommended that this service be disabled. oval:org.secpod.oval:def:55179 The kernel runtime parameter "net.ipv6.conf.default.accept_redirects" should be set to "0". oval:org.secpod.oval:def:55194 The eXtended InterNET Daemon ( xinetd ) is an open source super daemon that replaced the original inetd daemon. The xinetd daemon listens for well known services and dispatches the appropriate daemon to properly respond to service requests. oval:org.secpod.oval:def:55165 The kernel module udf should be disabled. oval:org.secpod.oval:def:55127 This test makes sure that '/etc/passwd' has proper permission. If the target file or directory has an extended ACL then it will fail the mode check. oval:org.secpod.oval:def:55112 The Simple Network Management Protocol (SNMP) server is used to listen for SNMP commands from an SNMP management system, execute the commands or collect the information and then send results back to the requesting system. oval:org.secpod.oval:def:55126 The root account is the only system account that should have a login shell. oval:org.secpod.oval:def:55211 Access permission for '/etc/cron.d' is set to appropriate values. oval:org.secpod.oval:def:55176 The kernel runtime parameter "net.ipv4.conf.all.log_martians" should be set to "1". oval:org.secpod.oval:def:55114 The PermitUserEnvironment option allows users to present environment options to the ssh daemon. oval:org.secpod.oval:def:55138 Record events affecting the group, passwd (user IDs), shadow and gshadow (passwords) or /etc/security/opasswd (old passwords, based on remember parameter in the PAM configuration) files. The parameters in this section will watch the files to see if they have been opened for write or have had attribu ... oval:org.secpod.oval:def:55106 The passwords to remember should be set correctly. oval:org.secpod.oval:def:55170 The kernel runtime parameter "net.ipv4.conf.all.rp_filter" should be set to "1". oval:org.secpod.oval:def:55215 Dovecot is an open source IMAP and POP3 server for Linux based systems. oval:org.secpod.oval:def:55195 The kernel module sctp should be disabled. oval:org.secpod.oval:def:55167 The squashfs Kernel Module should be disabled. oval:org.secpod.oval:def:55108 Mail Transfer Agents (MTA), such as sendmail and Postfix, are used to listen for incoming mail and transfer the messages to the appropriate user or mail server. If the system is not intended to be a mail server, it is recommended that the MTA be configured to only process local mail. oval:org.secpod.oval:def:55175 The kernel module hfsplus should be disabled. oval:org.secpod.oval:def:55133 Monitor changes to file permissions, attributes, ownership and group. The parameters in this section track changes for system calls that affect file permissions and attributes. The chmod, fchmod and fchmodat system calls affect the permissions associated with a file. The chown, fchown, fchownat and ... oval:org.secpod.oval:def:55125 The default umask for all users specified in /etc/login.defs oval:org.secpod.oval:def:55101 Root login via SSH should be disabled (and dependencies are met) oval:org.secpod.oval:def:55156 The DPKG package 'rsyslog' should be installed. oval:org.secpod.oval:def:55147 Set system audit so that audit rules cannot be modified with auditctl. Setting the flag "-e 2" forces audit to be put in immutable mode. Audit changes can only be made on system reboot. In immutable mode, unauthorized users cannot execute changes to the audit system to potentially hide malicious ac ... oval:org.secpod.oval:def:55159 SSH's cryptographic host-based authentication is more secure than .rhosts authentication. However, it is not recommended that hosts unilaterally trust one another, even within an organization. oval:org.secpod.oval:def:55197 The kernel module dccp should be disabled. oval:org.secpod.oval:def:55143 By default, rsyslog does not listen for log messages coming in from remote systems. The ModLoad tells rsyslog to load the imtcp.so module so it can listen over a network via TCP. The InputTCPServerRun option instructs rsyslogd to listen on the specified TCP port. The guidance in the section ensures ... oval:org.secpod.oval:def:55187 The kernel module tipc should be disabled. oval:org.secpod.oval:def:55158 Remote connections (SSH) from accounts with empty passwords should be disabled (and dependencies are met). oval:org.secpod.oval:def:55162 IPtables is an application that allows a system administrator to configure the IPv4 tables, chains and rules provided by the Linux kernel firewall. ufw was developed to ease IPtables firewall configuration. oval:org.secpod.oval:def:55193 The Berkeley rsh-server (rsh, rlogin, rcp) package contains legacy services that exchange credentials in clear-text. oval:org.secpod.oval:def:55107 The rsyncd service can be used to synchronize files between systems over network links. oval:org.secpod.oval:def:55113 Squid is a standard proxy server used in many distributions and environments. oval:org.secpod.oval:def:55180 The /etc/hosts.allow file contains networking information that is used by many applications and therefore must be readable for these applications to operate. oval:org.secpod.oval:def:55210 Configure /etc/cron.allow and /etc/at.allow to allow specific users to use these services. If /etc/cron.allow or /etc/at.allow do not exist, then /etc/at.deny and /etc/cron.deny are checked. Any user not specifically defined in those files is allowed to use at and cron. By removing the files, only u ... oval:org.secpod.oval:def:55148 Monitor the loading and unloading of kernel modules. The programs insmod (install a kernel module), rmmod (remove a kernel module), and modprobe (a more sophisticated program to load and unload modules, as well as some other features) control loading and unloading of modules. The init_module (load a ... oval:org.secpod.oval:def:55122 The X11Forwarding parameter provides the ability to tunnel X11 traffic through the connection to enable remote graphic connections. oval:org.secpod.oval:def:55116 There are several options available to limit which users and group can access the system via SSH. It is recommended that at least one of the following options be leveraged: AllowUsers The AllowUsers variable gives the system administrator the option of allowing specific users to ssh into the syste ... oval:org.secpod.oval:def:55097 The pam_cracklib module checks the strength of passwords. It performs checks such as making sure a password is not a dictionary word, it is a certain length, contains a mix of characters (e.g. alphabet, numeric, other) and more. The following are definitions of the pam_cracklib.so options. * retr ... oval:org.secpod.oval:def:55102 This test makes sure that '/etc/shadow' file permission is setted as appropriate. If the target file or directory has an extended ACL then it will fail the mode check. oval:org.secpod.oval:def:55135 Capture events where the system date and/or time has been modified. The parameters in this section are set to determine if the adjtimex (tune kernel clock), settimeofday (Set time, using timeval and timezone structures) stime (using seconds since 1/1/1970) or clock_settime (allows for the setting of ... oval:org.secpod.oval:def:55142 The prelinking feature changes binaries in an attempt to decrease their startup time. oval:org.secpod.oval:def:55105 File permission for '/etc/ssh/sshd_config' is set to appropriate values. oval:org.secpod.oval:def:55169 The kernel runtime parameter "net.ipv4.tcp_syncookies" should be set to "1". oval:org.secpod.oval:def:55149 The talk software makes it possible for users to send and receive messages across systems through a terminal session. oval:org.secpod.oval:def:55203 discard is a network service that responds to clients with the data sent to it by the client. This service is intended for debugging and testing purposes. It is recommended that this service be disabled. oval:org.secpod.oval:def:55134 Monitor session initiation events. The parameters in this section track changes to the files associated with session events. The file /var/run/utmp file tracks all currently logged in users. The /var/log/wtmp file tracks logins, logouts, shutdown and reboot events. All audit records will be tagged w ... oval:org.secpod.oval:def:55213 The /etc/crontab file is used by cron to control its own jobs. The commands in this item make sure that root is the user and group owner of the file and that only the owner can access the file. oval:org.secpod.oval:def:55181 Global IPv6 initialization should be disabled. oval:org.secpod.oval:def:55172 The kernel module jffs2 should be disabled. oval:org.secpod.oval:def:55099 The /etc/group file contains a list of all the valid groups defined in the system. The command below allows read/write access for root and read access for everyone else. oval:org.secpod.oval:def:55100 Only SSH protocol version 2 connections should be permitted. oval:org.secpod.oval:def:55157 TCP Wrappers provides a simple access list and standardized logging method for services capable of supporting it. In the past, services that were called from inetd and xinetd supported the use of tcp wrappers. As inetd and xinetd have been falling in disuse, any service that can support tcp wrappers ... oval:org.secpod.oval:def:55140 Monitor the use of system calls associated with the deletion or renaming of files and file attributes. This configuration statement sets up monitoring for the unlink (remove a file), unlinkat (remove a file attribute), rename (rename a file) and renameat (rename a file attribute) system calls and ta ... oval:org.secpod.oval:def:55117 The kernel runtime parameter "net.ipv4.conf.default.accept_redirects" should be set to "0". oval:org.secpod.oval:def:55183 The grub configuration file contains information on boot settings and passwords for unlocking boot options. The grub configuration is usually grub.cfg stored in /boot/grub. oval:org.secpod.oval:def:55120 The MaxAuthTries parameter specifies the maximum number of authentication attempts permitted per connection. When the login failure count reaches half the number, error messages will be written to the syslog file detailing the login failure. oval:org.secpod.oval:def:55218 This directory contains system cron jobs that need to run on an hourly basis. The files in this directory cannot be manipulated by the crontab command, but are instead edited by system administrators using a text editor. The commands below restrict read/write and search access to user and group root ... oval:org.secpod.oval:def:55160 The kernel module cramfs should be disabled. oval:org.secpod.oval:def:55186 The system's default desktop environment, GNOME, will mount devices and removable media (such as DVDs, CDs and USB flash drives) whenever they are inserted into the system. Disable automount and autorun within GNOME. oval:org.secpod.oval:def:55155 The Network Time Protocol (NTP) is designed to synchronize system clocks across a variety of systems and use a source that is highly accurate. More information on NTP can be found at http://www.ntp.org. NTP can be configured to be a client and/or a server. oval:org.secpod.oval:def:55154 The Lightweight Directory Access Protocol (LDAP) was introduced as a replacement for NIS/YP. It is a service that provides a method for looking up information from a central database. oval:org.secpod.oval:def:55173 The kernel module freevxfs should be disabled. oval:org.secpod.oval:def:55141 Monitor the use of the mount system call. The mount (and umount) system call controls the mounting and unmounting of file systems. The parameters below configure the system to create an audit record when the mount system call is used by a non-privileged user. It is highly unusual for a non privileg ... oval:org.secpod.oval:def:55189 The kernel module rds should be disabled. oval:org.secpod.oval:def:55178 File permission for '/etc/hosts.deny' is set to appropriate values. oval:org.secpod.oval:def:55161 The Banner parameter specifies a file whose contents must be sent to the remote user before authentication is permitted. By default, no banner is displayed. oval:org.secpod.oval:def:55103 The /etc/shadow file contains the one-way cipher text passwords for each user defined in the /etc/passwd file. The command below sets the user and group ownership of the file to root. oval:org.secpod.oval:def:55177 The kernel module hfs should be disabled. oval:org.secpod.oval:def:55166 The kernel runtime parameter "net.ipv4.icmp_ignore_bogus_error_responses" should be set to "1". oval:org.secpod.oval:def:55144 The Network Information Service (NIS), formerly known as Yellow Pages, is a client-server directory service protocol used to distribute system configuration files. oval:org.secpod.oval:def:55209 The /etc/cron.weekly directory contains system cron jobs that need to run on a weekly basis. The files in this directory cannot be manipulated by the crontab command, but are instead edited by system administrators using a text editor. The commands below restrict read/write and search access to user ... oval:org.secpod.oval:def:55096 The kernel runtime parameter "net.ipv6.conf.default.accept_ra" should be set to "0". oval:org.secpod.oval:def:55150 The rsh package contains the client commands for the rsh services. oval:org.secpod.oval:def:55145 Monitor the sudo log file. If the system has been properly configured to disable the use of the su command and force all administrators to have to log in first and then use sudo to execute privileged commands, then all administrator commands will be logged to /var/log/sudo.log. Any time a command is ... oval:org.secpod.oval:def:55152 The telnet service should be enabled or disabled as appropriate. oval:org.secpod.oval:def:55200 The cron daemon is used to execute batch jobs on the system. oval:org.secpod.oval:def:55206 echo is a network service that responds to clients with the data sent to it by the client. This service is intended for debugging and testing purposes. It is recommended that this service be disabled. oval:org.secpod.oval:def:55094 The Set Lockout Time For Failed Password Attempts should be set correctly. oval:org.secpod.oval:def:55121 The kernel runtime parameter "net.ipv4.conf.default.secure_redirects" should be set to "0". oval:org.secpod.oval:def:55207 daytime is a network service that responds with the server's current date and time. This service is intended for debugging and testing purposes. It is recommended that this service be disabled. oval:org.secpod.oval:def:55109 The kernel runtime parameter "net.ipv4.conf.all.send_redirects" should be set to "0". oval:org.secpod.oval:def:55198 Implement periodic file checking, in compliance with site policy. oval:org.secpod.oval:def:55164 Emulation of the rsh command through the ssh server should be disabled (and dependencies are met) oval:org.secpod.oval:def:55115 The su command allows a user to run a command or shell as another user. The program has been superseded by sudo, which allows for more granular control over privileged access. Normally, the su command can be executed by any user. By uncommenting the pam_wheel.so statement in /etc/pam.d/su, the su co ... oval:org.secpod.oval:def:55185 Core dumps for all users should be disabled oval:org.secpod.oval:def:55139 Monitor for unsuccessful attempts to access files. The parameters below are associated with system calls that control creation (creat), opening (open, openat) and truncation (truncate, ftruncate) of files. An audit log record will only be written if the user is a nonprivileged user (auid > = 500), i ... oval:org.secpod.oval:def:55196 Trivial File Transfer Protocol (TFTP) is a simple file transfer protocol, typically used to automatically transfer configuration or boot machines from a boot server. The packages tftp and atftp are both used to define and support a TFTP server. oval:org.secpod.oval:def:55168 The kernel runtime parameter "net.ipv4.icmp_echo_ignore_broadcasts" should be set to "1". oval:org.secpod.oval:def:55192 The talk software makes it possible for users to send and receive messages across systems through a terminal session. The talk client (allows initiate of talk sessions) is installed by default. oval:org.secpod.oval:def:55118 The Kernel Parameter for Accepting Source-Routed Packets By Default should be enabled or disabled as appropriate. The kernel runtime parameter "net.ipv4.conf.default.accept_source_route" should be set to "0". oval:org.secpod.oval:def:55111 The Samba daemon allows system administrators to configure their Linux systems to share file systems and directories with Windows desktops. Samba will advertise the file systems and directories via the Small Message Block (SMB) protocol. Windows desktop users will be able to mount these directories ... oval:org.secpod.oval:def:55124 File permissions for '/etc/group' should be set correctly. oval:org.secpod.oval:def:55104 The /etc/passwd file contains a list of all the valid userIDs defined in the system, but not the passwords. The command below sets the owner and group of the file to root. oval:org.secpod.oval:def:55199 Syslog logs should be sent to a remote loghost oval:org.secpod.oval:def:55110 The kernel runtime parameter "net.ipv4.ip_forward" should be set to "0". oval:org.secpod.oval:def:55153 The DPKG package 'aide' should be installed. oval:org.secpod.oval:def:55188 chargen is a network service that responds with 0 to 512 ASCII characters for each connection it receives. This service is intended for debugging and testing purposes. It is recommended that this service be disabled. oval:org.secpod.oval:def:55217 The File Transfer Protocol (FTP) provides networked computers with the ability to transfer files. oval:org.secpod.oval:def:55151 The DPKG package 'xserver-xorg-core' should be removed. oval:org.secpod.oval:def:55130 The auditd daemon can be configured to halt the system when the audit logs are full. In high security contexts, the risk of detecting unauthorized access or nonrepudiation exceeds the benefit of the system's availability. space_left_action, action_mail_acct and admin_space_left_action setting in / ... oval:org.secpod.oval:def:55131 Monitor login and logout events. The parameters below track changes to files associated with login/logout events. The file /var/log/faillog tracks failed events from login. The file /var/log/lastlog maintain records of the last time a user successfully logged in. The file /var/log/tallylog maintains ... oval:org.secpod.oval:def:55214 The Dynamic Host Configuration Protocol (DHCP) is a service that allows machines to be dynamically assigned IP addresses. oval:org.secpod.oval:def:55136 Configure grub or lilo so that processes that are capable of being audited can be audited even if they start up prior to auditd startup. Audit events need to be captured on processes that start up prior to auditd, so that potential malicious activity cannot go undetected. oval:org.secpod.oval:def:55123 The Set Password Warning Age should be set appropriately. oval:org.secpod.oval:def:55212 The Network File System (NFS) is one of the first and most widely distributed file systems in the UNIX environment. It provides the ability for systems to mount file systems of other servers through the network. oval:org.secpod.oval:def:55128 The accounts should be configured to expire automatically following Inactivity accounts. oval:org.secpod.oval:def:55182 The grub boot loader should have password protection enabled. oval:org.secpod.oval:def:55129 Normally, auditd will hold 4 logs of maximum log file size before deleting older log files. In high security contexts, the benefits of maintaining a long audit history exceed the cost of storing the audit history. max_log_file_action setting in /etc/audit/auditd.conf is set to at least a certain v ... oval:org.secpod.oval:def:55146 Monitor scope changes for system administrations. If the system has been properly configured to force system administrators to log in as themselves first and then use the sudo command to execute privileged commands, it is possible to monitor changes in scope. The file /etc/sudoers will be written t ... oval:org.secpod.oval:def:55174 The file /etc/securetty contains a list of valid terminals that may be logged in directly as root. oval:org.secpod.oval:def:55163 The two options ClientAliveInterval and ClientAliveCountMax control the timeout of ssh sessions. When the ClientAliveInterval variable is set, ssh sessions that have no activity for the specified length of time are terminated. When the ClientAliveCountMax variable is set, sshd will send client alive ... oval:org.secpod.oval:def:55171 Install and turn on the auditd daemon to record system events. The capturing of system events provides system administrators with information to allow them to determine if unauthorized access to their system is occurring oval:org.secpod.oval:def:55095 The minimum password age policy should be set appropriately. oval:org.secpod.oval:def:55137 Record changes to network environment files or system calls. The below parameters monitor the sethostname (set the systems host name) or setdomainname (set the systems domainname) system calls, and write an audit event on system call exit. The other parameters monitor the /etc/issue and /etc/issue.n ... oval:org.secpod.oval:def:55098 The maximum password age policy should meet minimum requirements. oval:org.secpod.oval:def:55132 Monitor SELinux mandatory access controls. The parameters below monitor any write access (potential additional, deletion or modification of files in the directory) or attribute changes to the /etc/selinux directory. Changes to files in this directory could indicate that an unauthorized user is atte ... oval:org.secpod.oval:def:55201 The logrotate (syslog rotater) service should be enabled. |
