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NTP Bug 3118

Mode 6 unauthenticated trap information disclosure and DDoS vector

  • Date Resolved: 21 Nov 2016
  • References: Sec 3118 / CVE-2016-9310 / VU#633847
  • Affects: ntp-4.0.90 (21 July 1999), possibly earlier, up to but not including ntp-4.2.8p9, and ntp-4.3.0 up to, but not including ntp-4.3.94.
  • CVSS2: MED 6.4 (AV:A/AC:L/Au:N/C:N/I:N/A:P)
  • CVSS3: MED 6.5 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  • Summary: An exploitable configuration modification vulnerability exists in the control mode (mode 6) functionality of ntpd. If, against long-standing BCP recommendations, "restrict default noquery ..." is not specified, a specially crafted control mode packet can set ntpd traps, providing information disclosure and DDoS amplification, and unset ntpd traps, disabling legitimate monitoring. A remote, unauthenticated, network attacker can trigger this vulnerability.
  • Mitigation:
  • Credit: This weakness was discovered by Matthew Van Gundy of Cisco.


This topic: Main > SecurityNotice > NtpBug3118
Topic revision: r1 - 2016-11-21 - 14:03:43 - HarlanStenn
 
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