Apply by doing:
cd /usr/src
patch -p0 < 013_pf.patch
Then build and install a new kernel.
--- sys/net/pf.c 20 Feb 2008 23:40:13 -0000 1.567
+++ sys/net/pf.c 10 Apr 2009 22:47:49 -0000
@@ -5620,6 +5620,15 @@ pf_test(int dir, struct ifnet *ifp, struct mbuf **m0,
break;
}
+#ifdef INET6
+ case IPPROTO_ICMPV6: {
+ action = PF_DROP;
+ DPFPRINTF(PF_DEBUG_MISC,
+ ("pf: dropping IPv4 packet with ICMPv6 payload\n"));
+ goto done;
+ }
+#endif
+
default:
action = pf_test_state_other(&s, dir, kif, &pd);
if (action == PF_PASS) {
@@ -5969,6 +5978,13 @@ pf_test6(int dir, struct ifnet *ifp, struct mbuf **m0,
action = pf_test_rule(&r, &s, dir, kif,
m, off, h, &pd, &a, &ruleset, &ip6intrq);
break;
+ }
+
+ case IPPROTO_ICMP: {
+ action = PF_DROP;
+ DPFPRINTF(PF_DEBUG_MISC,
+ ("pf: dropping IPv6 packet with ICMPv4 payload\n"));
+ goto done;
}
case IPPROTO_ICMPV6: {
