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diff -Nru libgtop-1.0.13.orig/src/daemon/gnuserv.c libgtop-1.0.13/src/daemon/gnuserv.c
--- libgtop-1.0.13.orig/src/daemon/gnuserv.c Mon Nov 26 20:37:59 2001
+++ libgtop-1.0.13/src/daemon/gnuserv.c Tue Nov 27 09:16:16 2001
@@ -200,6 +200,13 @@

 	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;