CVE-2015-5219: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 6.1% chance of exploitation in the next 30 days.

The ULOGTOD function in ntp.d in SNTP before 4.2.7p366 does not properly perform type conversions from a precision value to a double, which allows remote attackers to cause a denial of service (infinite loop) via a crafted NTP packet.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 15.04 only; version 15.10 only
• Debian Debian Linux: version 7.0 only; version 8.0 only
• Fedoraproject Fedora: version 21 only; version 22 only; version 23 only
• Novell Leap: version 42.2 only
• Ntp Ntp: up to and including 4.2.7
• Opensuse Leap: version 42.1 only
• Oracle Linux: version 6 only
• Red Hat Enterprise Linux Desktop: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Hpc Node: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Workstation: version 6.0 only; version 7.0 only
• Siemens Tim 4r-Id DNP3 Firmware: any version
• Siemens Tim 4r-Ie Firmware: any version
• Suse Linux Enterprise Debuginfo: version 11 only
• Suse Linux Enterprise Server: version 10 only; version 11 only
• Suse Manager: version 2.1 only
• Suse Manager Proxy: version 2.1 only
• Suse Openstack Cloud: version 5 only

Published 2017-07-21. Last modified 2026-06-17.