Fixed
Created: Nov 21, 2016
Updated: Sep 8, 2018
Resolved Date: Nov 24, 2016
Found In Version: 7.0
Fix Version: 7.0.0.22
Severity: Standard
Applicable for: Wind River Linux 7
Component/s: Userspace
The broadcast mode of NTP is expected to only be used in a trusted network. If the broadcast network is accessible to an attacker, a potentially exploitable denial of service vulnerability in ntpd's broadcast mode poll interval enforcement functionality can be abused. To limit abuse, ntpd restricts the rate at which each broadcast association will process incoming packets. ntpd will reject broadcast mode packets that arrive before the poll interval specified in the preceding broadcast packet expires. An attacker with access to the NTP broadcast domain can send specially crafted broadcast mode NTP packets to the broadcast domain which, while being logged by ntpd, will cause ntpd to reject broadcast mode packets from legitimate NTP broadcast servers.
http://support.ntp.org/bin/view/Main/NtpBug3113
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-7428
