NTP users are strongly urged to take immediate action to ensure that their NTP daemons are not susceptible to being used in distributed denial-of-service (DDoS) attacks. Please also take this opportunity to defeat denial-of-service attacks by implementing Ingress and Egress filtering through BCP38.

ntp-4.2.8p15 was released on 23 June 2020. It addresses 1 medium-severity security issue in ntpd, and provides 13 non-security bugfixes over 4.2.8p13.

Please see the NTP Security Notice for vulnerability and mitigation details.

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Are you using Autokey in production? If so, please contact Harlan - he's got some questions for you.

NTP Bug 3382

NTP-01-007 NTP: Data Structure terminated insufficiently (WINDOWS installer ONLY) (Low)

• Date Resolved: 21 Mar 2017
• References: Sec 3382 / CVE-2017-6459 / VU#325339
• Affects: WINDOWS installer ONLY: All ntp-4 versions of the Windows installer, up to but not including ntp-4.2.8p10, and ntp-4.3.0 up to, but not including ntp-4.3.94.
• CVSS2: Low 1.0 (AV:L/AC:H/Au:S/C:N/I:N/A:P)
• CVSS3: Low 1.8 CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L
• Summary: The Windows installer for NTP calls strcpy() with an argument that specifically contains multiple null bytes. strcpy() only copies a single terminating null character into the target buffer instead of copying the required double null bytes in the addKeysToRegistry() function. As a consequence, a garbage registry entry can be created. The additional arsize parameter is erroneously set to contain two null bytes and the following call to RegSetValueEx() claims to be passing in a multi-string value, though this may not be true.
• Mitigation:
  • Upgrade to 4.2.8p10, or later, from the NTP Project Download Page or the NTP Public Services Project Download Page
• Credit: This weakness was discovered by Cure53.