Severity: : Critical

  DESCRIPTION

The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.

  INFORMATION EXPOSURE

Apply associated Trend Micro DPI Rules.

  SOLUTION

  Trend Micro Deep Security DPI Rule Number: 1006630