diff -up ntp-4.2.6p5/ntpd/ntp_proto.c.cve-2015-7979 ntp-4.2.6p5/ntpd/ntp_proto.c
--- ntp-4.2.6p5/ntpd/ntp_proto.c.cve-2015-7979 2016-01-21 14:20:45.760431895 +0100
+++ ntp-4.2.6p5/ntpd/ntp_proto.c 2016-01-21 14:46:13.027106826 +0100
@@ -1127,7 +1127,8 @@ receive(
report_event(PEVNT_AUTH, peer, "crypto_NAK");
peer->flash |= TEST5; /* bad auth */
peer->badauth++;
- if (peer->flags & FLAG_PREEMPT) {
+ if (peer->flags & FLAG_PREEMPT && hismode != MODE_BROADCAST &&
+ !(peer->flash & (TEST2 | TEST3))) {
unpeer(peer);
return;
}
@@ -1153,7 +1154,8 @@ receive(
if (has_mac &&
(hismode == MODE_ACTIVE || hismode == MODE_PASSIVE))
fast_xmit(rbufp, MODE_ACTIVE, 0, restrict_mask);