Ripped from Fedora.

--- traceroute-1.4a5/traceroute.c.secfix	Fri Jun 13 05:30:27 1997
+++ traceroute-1.4a5/traceroute.c	Tue Dec 16 12:14:32 1997
@@ -368,6 +368,10 @@
 			break;
 
 		case 'g':
+			if (strlen(optarg) >= MAXHOSTNAMELEN) {
+			    Fprintf(stderr, "%s: Nice Try !\n", prog);
+			    exit(-1);
+			}
 			if (lsrr >= NGATEWAYS) {
 				Fprintf(stderr,
 				    "%s: No more than %d gateways\n",
@@ -380,6 +384,11 @@
 
 		case 'i':
 			device = optarg;
+			if (strlen(device) >= 16) { /* that is the IFNAMSIZ
+						     * from kernel headers */
+			    Fprintf(stderr, "%s: Nice try !\n", prog);
+			    exit(-1);
+			}
 			break;
 
 		case 'I':
@@ -412,6 +421,10 @@
 			 * probe (e.g., on a multi-homed host).
 			 */
 			source = optarg;
+			if (strlen(source) >= MAXHOSTNAMELEN) {
+			    Fprintf(stderr, "%s: Nice Try !\n", prog);
+			    exit(-1);
+			}
 			break;
 
 		case 't':
@@ -470,6 +483,10 @@
 
 	case 1:
 		hostname = argv[optind];
+		if (strlen(hostname) >= MAXHOSTNAMELEN) {
+		    Fprintf(stderr, "%s: Nice try !\n", prog);
+		    exit(-1);
+		}
 		hi = gethostinfo(hostname);
 		setsin(to, hi->addrs[0]);
 		if (hi->n > 1)