r1 - 2017-03-22 - 01:35:54 - HarlanStennYou are here: NTP >  Main Web > SecurityNotice > NtpBug3382
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-4.2.8p10 was released on 21 March 2017. It addresses 6 medum- and 5 low-severity security issues, 4 informational security topics, 15 bugfixes, and contains other improvements over 4.2.8p9.

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

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:
  • Credit: This weakness was discovered by Cure53.
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