diff -u heartbeat-1.2.3/heartbeat/heartbeat.c heartbeat-1.2.3/heartbeat/heartbeat.c
--- heartbeat-1.2.3/heartbeat/heartbeat.c
+++ heartbeat-1.2.3/heartbeat/heartbeat.c
@@ -469,7 +469,7 @@
 	int	ipcid;
 	struct pstat_shm *	shm;
 
-	if ((ipcid = shmget(IPC_PRIVATE, sizeof(*procinfo), 0666)) < 0) {
+	if ((ipcid = shmget(IPC_PRIVATE, sizeof(*procinfo), 0600)) < 0) {
 		cl_perror("Cannot shmget for process status");
 		return;
 	}