$OpenBSD: patch-src_daemon_gnuserv_c,v 1.1 2003/05/10 02:46:54 marcm Exp $
--- src/daemon/gnuserv.c.orig	Fri May  9 17:06:45 2003
+++ src/daemon/gnuserv.c	Fri May  9 17:09:13 2003
@@ -200,6 +200,12 @@ permitted (u_long host_addr, int fd)
 
 	auth_data_len = atoi (buf);
 
+	if (auth_data_len < 1 || auth_data_len > sizeof(buf)) {
+		syslog_message(LOG_WARNING,
+			       "Invalid data length supplied by client");
+		return FALSE;
+	}
+
 	if (timed_read (fd, buf, auth_data_len, AUTH_TIMEOUT, 0) != auth_data_len)
 	    return FALSE;