Title

The 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 that accepts 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. #ps -ef | grep syslogd | grep -v grep If the -R option is not present, this is a finding.

Fix Text

Change the syslogd arguments in the src subsystem control and restart the syslogd daemon. # chssys -s syslogd -a '-R' # stopsrc -s syslogd # startsrc -s syslogd

Additional Identifiers

Rule ID: SV-38894r1_rule

Vulnerability ID: V-12021

Group Title: GEN005480

Expert Comments

CCIs tied to check.

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