--- XFree86-4.0.2/xc/programs/xdm/xdmcp.c~	Thu Dec 21 19:46:57 2000
+++ XFree86-4.0.2/xc/programs/xdm/xdmcp.c	Thu Dec 21 19:47:25 2000
@@ -1128,7 +1128,7 @@
     XdmcpHeader	header;
     ARRAY8	status;
 
-    sprintf (buf, "Session %ld failed for display %.100s: %.100s",
+    snprintf (buf, sizeof(buf), "Session %ld failed for display %.100s: %.100s",
 	     (long) sessionID, name, reason);
     Debug ("Send failed %ld %s\n", (long) sessionID, buf);
     status.length = strlen (buf);