diff -ru work/dc20ctrl-0.4/thumbs_to_file.c dc20ctrl-0.4/thumbs_to_file.c
--- work/dc20ctrl-0.4/thumbs_to_file.c	Tue Feb 17 09:19:47 1998
+++ thumbs_to_file.c	Mon Feb  5 18:51:27 2001
@@ -67,8 +67,8 @@
 				}
 			}
 
-			sprintf(file, base_name, i+1);
-	
+			if (snprintf(file, sizeof(file), base_name, i+1) >= sizeof(file))
+				return -1;
 			save_pixmap(pp, file, (orientation_mask >> (i*2)) & ROT_MASK, format);
 		}
 	}