The Ubuntu operating system must monitor remote access methods.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-238324	UBTU-20-010403	SV-238324r832959_rule		Medium

Description
Remote access services, such as those providing remote access to network devices and information systems, which lack automated monitoring capabilities, increase risk and make remote user access management difficult at best. Remote access is access to DoD nonpublic information systems by an authorized user (or an information system) communicating through an external, non-organization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. Automated monitoring of remote access sessions allows organizations to detect cyber attacks and also ensure ongoing compliance with remote access policies by auditing connection activities of remote access capabilities, such as Remote Desktop Protocol (RDP), on a variety of information system components (e.g., servers, workstations, notebook computers, smartphones, and tablets).

Description

Remote access services, such as those providing remote access to network devices and information systems, which lack automated monitoring capabilities, increase risk and make remote user access management difficult at best. Remote access is access to DoD nonpublic information systems by an authorized user (or an information system) communicating through an external, non-organization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. Automated monitoring of remote access sessions allows organizations to detect cyber attacks and also ensure ongoing compliance with remote access policies by auditing connection activities of remote access capabilities, such as Remote Desktop Protocol (RDP), on a variety of information system components (e.g., servers, workstations, notebook computers, smartphones, and tablets).

STIG	Date
Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide	2023-09-08

Details

Check Text ( C-41534r832957_chk )
Verify that the Ubuntu operating system monitors all remote access methods. Check that remote access methods are being logged by running the following command: $ grep -E -r '^(auth,authpriv\.\\|daemon\.\)' /etc/rsyslog.* /etc/rsyslog.d/50-default.conf:auth,authpriv.* /var/log/auth.log /etc/rsyslog.d/50-default.conf:daemon.* /var/log/messages If "auth.", "authpriv.", or "daemon.*" are not configured to be logged in at least one of the config files, this is a finding.

Check Text ( C-41534r832957_chk )

Verify that the Ubuntu operating system monitors all remote access methods.

Check that remote access methods are being logged by running the following command:

$ grep -E -r '^(auth,authpriv\.\*|daemon\.\*)' /etc/rsyslog.*
/etc/rsyslog.d/50-default.conf:auth,authpriv.* /var/log/auth.log
/etc/rsyslog.d/50-default.conf:daemon.* /var/log/messages

If "auth.*", "authpriv.*", or "daemon.*" are not configured to be logged in at least one of the config files, this is a finding.

Fix Text (F-41493r832958_fix)
Configure the Ubuntu operating system to monitor all remote access methods by adding the following lines to the "/etc/rsyslog.d/50-default.conf" file: auth.,authpriv. /var/log/secure daemon.* /var/log/messages For the changes to take effect, restart the "rsyslog" service with the following command: $ sudo systemctl restart rsyslog.service