diff -up autofs-5.0.1/modules/parse_sun.c.hosts-nosuid-default autofs-5.0.1/modules/parse_sun.c
--- autofs-5.0.1/modules/parse_sun.c.hosts-nosuid-default	2007-12-05 17:07:25.000000000 +0900
+++ autofs-5.0.1/modules/parse_sun.c	2007-12-05 17:07:55.000000000 +0900
@@ -496,6 +496,7 @@ static int sun_mount(struct autofs_point
 	int rv, cur_state;
 	char *mountpoint;
 	char *what;
+	char *type;
 
 	if (*options == '\0')
 		options = NULL;
@@ -585,6 +586,36 @@ static int sun_mount(struct autofs_point
 	mountpoint = alloca(namelen + 1);
 	sprintf(mountpoint, "%.*s", namelen, name);
 
+	type = ap->entry->maps->type;
+	if (type && !strcmp(type, "hosts")) {
+		if (options) {
+			if (!strstr(options, "suid")) {
+				char *tmp = alloca(strlen(options) + 8);
+				if (!tmp) {
+					error(ap->logopt, MODPREFIX
+					      "alloca failed for options");
+					if (nonstrict)
+						return -1;
+					return 1;
+				}
+				strcpy(tmp, options);
+				strcat(tmp, ",nosuid");
+				options = tmp;
+			}
+		} else {
+			char *tmp = alloca(7);
+			if (!tmp) {
+				error(ap->logopt,
+				      MODPREFIX "alloca failed for options");
+				if (nonstrict)
+					return -1;
+				return 1;
+			}
+			strcpy(tmp, "nosuid");
+			options = tmp;
+		}
+	}
+
 	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cur_state);
 	if (!strcmp(fstype, "nfs")) {
 		what = alloca(loclen + 1);
diff -up autofs-5.0.1/samples/auto.master.hosts-nosuid-default autofs-5.0.1/samples/auto.master
--- autofs-5.0.1/samples/auto.master.hosts-nosuid-default	2007-12-05 17:07:24.000000000 +0900
+++ autofs-5.0.1/samples/auto.master	2007-12-05 17:07:55.000000000 +0900
@@ -7,6 +7,11 @@
 # For details of the format look at autofs(5).
 #
 /misc	/etc/auto.misc
+#
+# NOTE: mounts done from a hosts map will be mounted with the
+#	"nosuid" option unless the "suid" option is explicitly
+#	given.
+#
 /net	-hosts
 #
 # Include central master map if it can be found using
diff -up autofs-5.0.1/man/auto.master.5.in.hosts-nosuid-default autofs-5.0.1/man/auto.master.5.in
--- autofs-5.0.1/man/auto.master.5.in.hosts-nosuid-default	2007-12-05 17:07:25.000000000 +0900
+++ autofs-5.0.1/man/auto.master.5.in	2007-12-05 17:07:55.000000000 +0900
@@ -196,6 +196,9 @@ For example, with an entry in the master
 .hy
 accessing /net/myserver will mount exports from myserver on directories below
 /net/myserver.
+.P
+NOTE: mounts done from a hosts map will be mounted with the "nosuid" option
+unless the "suid" option is explicitly given in the master map entry.
 .SH LDAP MAPS
 If the map type \fBldap\fP is specified the mapname is of the form
 \fB[//servername/]dn\fP, where the optional \fBservername\fP is