--- security.functions  2018-08-13 09:15:30.750905000 +0200
+++ /etc/periodic/security/security.functions   2018-08-13 09:22:53.467299000 +0200
@@ -65,6 +65,8 @@
     cat > ${tmpf}
   fi

+  tmpo=`mktemp -t security`
+
   if [ ! -f ${LOG}/${label}.today ]; then
     rc=1
     echo ""
@@ -72,16 +74,22 @@
     cp ${tmpf} ${LOG}/${label}.today || rc=3
   fi

-  if ! cmp -s ${LOG}/${label}.today ${tmpf} >/dev/null; then
+  diff ${security_status_diff_flags} ${LOG}/${label}.today \
+    ${tmpf} | eval "${filter}" > ${tmpo}
+
+  if [ -s ${tmpo} ]; then
     [ $rc -lt 1 ] && rc=1
     echo ""
     echo "${msg}"
     diff ${security_status_diff_flags} ${LOG}/${label}.today \
        ${tmpf} | eval "${filter}"
+  fi
+
+  if ! cmp -s ${LOG}/${label}.today ${tmpf} >/dev/null; then
     mv ${LOG}/${label}.today ${LOG}/${label}.yesterday || rc=3
     mv ${tmpf} ${LOG}/${label}.today || rc=3
   fi

-  rm -f ${tmpf}
+  rm -f ${tmpf} ${tmpo}
   exit ${rc}
 }