The remote SUSE host is missing one or more security updates.
NTP was updated to 4.2.8p12 (bsc#1111853) : CVE-2018-12327: Fixed stack-based buffer overflow in the openhost() command-line call of NTPQ/NTPDC. (bsc#1098531) CVE-2018-7170: Add further tweaks to improve the fix for the ephemeral association time spoofing additional protection (bsc#1083424) Please also see https://www.nwtime.org/network-time-foundation-publishes-ntp-4-2-8p12/ for more information. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'. Alternatively you can run the command listed for your product : SUSE Linux Enterprise Module for Legacy Software 15:zypper in -t patch SUSE-SLE-Module-Legacy-15-2018-2431=1