Apply by doing
	cd /usr/src/libexec/uucpd
	patch -p0 < uucpd.patch

And then to rebuild and install
	make && make install

Index: uucpd.c
===================================================================
RCS file: /cvs/src/libexec/uucpd/uucpd.c,v
retrieving revision 1.11
retrieving revision 1.12
diff -u -r1.11 -r1.12
--- uucpd.c	1997/08/31 08:24:01	1.11
+++ uucpd.c	1998/04/22 14:19:51	1.12
@@ -42,7 +42,7 @@
 
 #ifndef lint
 /*static char sccsid[] = "from: @(#)uucpd.c	5.10 (Berkeley) 2/26/91";*/
-static char rcsid[] = "$Id: uucpd.c,v 1.11 1997/08/31 08:24:01 deraadt Exp $";
+static char rcsid[] = "$Id: uucpd.c,v 1.12 1998/04/22 14:19:51 deraadt Exp $";
 #endif /* not lint */
 
 /*
@@ -304,7 +304,8 @@
 
 		time(&ll.ll_time);
 		lseek(f, pw->pw_uid * sizeof(struct lastlog), 0);
-		strcpy(line, remotehost);
+		strncpy(line, remotehost, sizeof line-1);
+		line[sizeof line-1] = '\0';
 		SCPYN(ll.ll_line, line);
 		SCPYN(ll.ll_host, remotehost);
 		(void) write(f, (char *) &ll, sizeof ll);