CVE-2016-7428 log

Source
Severity Medium
Remote Yes
Type Denial of service
Description
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.
Group Package Affected Fixed Severity Status Ticket
AVG-80 ntp 4.2.8.p8-1 4.2.8.p9-1 High Fixed
AVG-79 ntp 4.2.8.p8-1 4.2.8.p9-1 High Fixed
Date Advisory Group Package Severity Description
26 Nov 2016 ASA-201611-28 AVG-79 ntp High multiple issues
References
http://support.ntp.org/bin/view/Main/NtpBug3113
Notes
Mitigation:
Only use broadcast mode on trusted networks.