The systems access control program must log each system access attempt.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-941	GEN006600	SV-45930r1_rule		Medium

Description
If access attempts are not logged, then multiple attempts to log on to the system by an unauthorized user may go undetected.

STIG	Date
SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide	2018-09-19

Details

Check Text ( C-43234r1_chk )
The tcp_wrappers package (i.e. tcpd) is provided with the SLES mainframe distribution. Other access control programs may be available but will need to be checked manually. Normally, tcpd logs to the mail facility in "/etc/syslog.conf". Determine if syslog is configured to log events by tcpd. Procedure: # more /etc/syslog.conf Look for entries similar to the following: mail.debug /var/adm/maillog mail.none /var/adm/maillog mail.* /var/log/mail authpriv.info /var/log/messages The above entries would indicate mail alerts are being logged. If no entries for mail exist, then tcpd is not logging this is a finding. If an alternate access control program is used and it does not provide logging of access attempts, this is a finding.

Check Text ( C-43234r1_chk )

The tcp_wrappers package (i.e. tcpd) is provided with the SLES mainframe distribution. Other access control programs may be available but will need to be checked manually.

Normally, tcpd logs to the mail facility in "/etc/syslog.conf". Determine if syslog is configured to log events by tcpd.

Procedure:
# more /etc/syslog.conf

Look for entries similar to the following:
mail.debug /var/adm/maillog
mail.none /var/adm/maillog
mail.* /var/log/mail
authpriv.info /var/log/messages

The above entries would indicate mail alerts are being logged. If no entries for mail exist, then tcpd is not logging this is a finding.

If an alternate access control program is used and it does not provide logging of access attempts, this is a finding.

Fix Text (F-39306r1_fix)
Configure the access restriction program to log every access attempt. Ensure the implementation instructions for tcp_wrappers (i.e. tcpd) are followed so system access attempts are recorded to the system log files. If an alternate application is used, it must support this function.