Title

The AIX syslog daemon must not accept remote messages unless it is a syslog server documented using site-defined procedures. (Cat II impact)

Discussion

Unintentionally running a syslog server accepting remote messages puts the system at increased risk. Malicious syslog messages sent to the server could exploit vulnerabilities in the server software itself, could introduce misleading information in to the system's logs, or could fill the system's storage leading to a Denial of Service.

Check Content

Verify "syslogd" is running with the "-R" option using command: # ps -ef | grep syslogd | grep -v grep The above command should yield the following output: root 4063356 3342368 0 Sep 11 - 0:01 /usr/sbin/syslogd -R If the "-R" option is not present with the syslogd process, this is a finding.

Fix Text

Change the "syslogd" arguments in the src subsystem control and restart the "syslogd" daemon using the following commands: # chssys -s syslogd -a '-R' # stopsrc -s syslogd # startsrc -s syslogd

Additional Identifiers

Rule ID: SV-215313r991589_rule

Vulnerability ID: V-215313

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.