Ubuntu OS must configure the "/var/log/syslog" file to be group-owned by "adm".

Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the operating system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives.

The structure and content of error messages must be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements.

Verify that Ubuntu OS configures the "/var/log/syslog" file to be group-owned by "adm" by using the following command:

     $ stat -c "%n %G" /var/log/syslog 
     /var/log/syslog adm  

If the "/var/log/syslog" file is not group-owned by "adm", this is a finding.

Configure Ubuntu OS to have adm group-own the "/var/log/syslog" file by using the following command:

     $ sudo chgrp adm /var/log/syslog