AIX must monitor and record successful remote logins.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-91239	AIX7-00-002100	SV-101339r1_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
IBM AIX 7.x Security Technical Implementation Guide	2020-02-24

Details

Check Text ( C-90395r1_chk )
Check if the file "/var/adm/wtmp" is a symlink by using the following command: # ls -al /var/adm/wtmp The above command should yield the following output: -rw-rw-r-- 1 adm adm 45360 Sep 05 15:00 /var/adm/wtmp If the file "/var/adm/wtmp" is a symlink, this is a finding.

Fix Text (F-97439r1_fix)
Remove the symlink of "/var/adm/wtmp" file by using the following command: # rm /var/adm/wtmp The "/var/adm/wtmp" file will be created when the system logs event for successful or failed login.