Network Time Protocol Daemon (ntpd) Security Notice

Number: AV16-091
Date: 3 June 2016

Purpose

The purpose of this advisory is to bring attention to a Security Notice for Network Time Protocol Daemon (ntpd).

Assessment

CCIRC is aware of vulnerabilities (1 high, 4 low) in the Network Time Protocol Daemon (ntpd) which if exploited, could allow a remote unauthenticated attacker to cause a denial-of-service condition in ntpd.

Affected versions: ntpd versions prior to 4.2.8p8

CVE References:  CVE-2016-4953, CVE-2016-4954, CVE-2016-4955, CVE-2016-4956, CVE-2016-4957

Suggested Action

CCIRC recommends that system administrators identify their affected assets and potential interdependencies with their organization’s critical services, and follow their patch management process accordingly or consider applying the workarounds.

References:

NTP Security Notice - June 2016 ntp-4.2.8p8 NTP:
http://support.ntp.org/bin/view/Main/SecurityNotice

CERT/CC Vulnerability VulnerabilityA flaw or weakness in the design or implementation of an information system or its environment that could be exploited to adversely affect an organization's assets or operations. Note 321640:
https://www.kb.cert.org/vuls/id/321640