diff -ur zip-2.3/zip.c zip-2.3-lhh/zip.c
--- zip-2.3/zip.c	1999-11-16 15:08:10.000000000 -0500
+++ zip-2.3-lhh/zip.c	2003-12-22 09:32:56.000000000 -0500
@@ -849,6 +849,7 @@
 /* Add, update, freshen, or delete zip entries in a zip file.  See the
    command help in help() above. */
 {
+  mode_t old_umask;	/* umask prior to temp file creation */
   int a;                /* attributes of zip file */
   ulg c;                /* start of central directory */
   int d;                /* true if just adding to a zip file */
@@ -1830,9 +1831,11 @@
     if ((tempzip = tempname(zipfile)) == NULL) {
       ZIPERR(ZE_MEM, "allocating temp filename");
     }
+    old_umask = umask(0066);
     if ((tempzf = y = fopen(tempzip, FOPW_TMP)) == NULL) {
       ZIPERR(ZE_TEMP, tempzip);
     }
+    umask(old_umask);
   }
 
 #if (!defined(VMS) && !defined(CMS_MVS))