Implementation Guide

HPE AOS‑CX Critical RCE Patch – Developer Guide

HPE Aruba OS‑CX (AOS‑CX) switches received a critical Remote Code Execution (RCE) fix (CVSS 9.8). This guide shows how to query the switch, verify the installed firmware, and – if needed – push the patched image using the official REST API.

⚠️ Disclaimer – The code below works against a real AOS‑CX switch only when you have valid admin credentials and network reachability. Replace placeholder values (IP, username/password, firmware URL) with your own. Always test in a lab before touching production gear.

Step 1: Prerequisites

Item	Why you need it	Minimum version
HPE Aruba AOS‑CX switch	Target device exposing the REST/HTTPS API	Any version that supports the REST API (10.04+ recommended)
API access enabled	The switch must have `rest-api` service turned on (`rest-api enable`)	–
Admin (or operator) credentials	Needed for authentication token	–
Python 3.8+	For the Python sample	3.8
Node.js 14+ (or Deno)	For the JS/TS sample	14 LTS
HTTPS reachability	API runs over TLS; you must trust the switch’s cert or disable verification (not recommended for prod)	–
Optional: `jq` or `httpie`	Handy for quick CLI checks	–

Step 2: Installation & Setup

2.1 Python

# Create a virtual environment (recommended)
python3 -m venv aosxcx-env
source aosxcx-env/bin/activate   # Windows: aosxcx-env\Scripts\activate

# Install required packages
pip install --upgrade pip
pip install requests python-dotenv tqdm

2.2 JavaScript / TypeScript

# Initialise a new npm project (skip if you already have one)
mkdir aosxcx-js && cd aosxcx-js
npm init -y

# Install dependencies
npm install axios dotenv
# If you prefer TypeScript:
npm install --save-dev typescript @types/node ts-node
npx tsc --init   # creates tsconfig.json

Step 3: Basic Implementation

All samples follow the same logical flow:

Login → obtain a short‑lived token (/rest/v1/login).
GET system info → verify reachability.
GET firmware version → compare against the patched version released by HPE.
(Optional) Upload & install patch → POST the firmware image to /rest/v1/system/firmware/upload then trigger a reload.

The exact endpoints may vary slightly between AOS‑CX releases; the ones below are taken from the 10.04 API reference and work on most recent trains.

3.1 Python (`aosxcx_patch.py`)

#!/usr/bin/env python3
"""
HPE AOS‑CX RCE patch helper – Python version.
- Logs in to the switch via REST API.
- Retrieves current firmware version.
- (Optional) Uploads and activates a patched firmware image.
"""

import os
import sys
import json
import base64
import getpass
from pathlib import Path
from typing import Optional

import requests
from dotenv import load_dotenv
from tqdm import tqdm

# ----------------------------------------------------------------------
# Load configuration from .env (see Step 4)
# ----------------------------------------------------------------------
load_dotenv()  # pulls SWITCH_IP, USERNAME, PASSWORD, FIRMWARE_URL, etc.

SWITCH_IP = os.getenv("SWITCH_IP")
USERNAME = os.getenv("USERNAME")
PASSWORD = os.getenv("PASSWORD")
# If you prefer to be prompted for password at runtime, comment the line above.
FIRMWARE_URL = os.getenv("FIRMWARE_URL")  # HTTP(S) location of the .swi file
VERIFY_SSL = os.getenv("VERIFY_SSL", "true").lower() == "true"

BASE_URL = f"https://{SWITCH_IP}/rest/v1"
HEADERS = {"Content-Type": "application/json"}

# ----------------------------------------------------------------------
# Helper: pretty‑print errors and exit
# ----------------------------------------------------------------------
def fail(msg: str):
    print(f"[ERROR] {msg}", file=sys.stderr)
    sys.exit(1)

# ----------------------------------------------------------------------
# 1️⃣ Authentication – obtain a token
# ----------------------------------------------------------------------
def get_auth_token() -> str:
    login_url = f"https://icarax.com/login"
    payload = {"username": USERNAME, "password": PASSWORD}
    try:
        resp = requests.post(login_url, json=payload, headers=HEADERS,
                             verify=VERIFY_SSL, timeout=10)
        resp.raise_for_status()
    except requests.RequestException as e:
        fail(f"Unable to reach {login_url}: {e}")

    data = resp.json()
    token = data.get("token")
    if not token:
        fail("Login succeeded but no token returned.")
    return token

# ----------------------------------------------------------------------
# 2️⃣ GET system information (sanity check)
# ----------------------------------------------------------------------
def get_system_info(token: str) -> dict:
    url = f"{BASE_URL}/system"
    headers = {**HEADERS, "Authorization": f"Bearer {token}"}
    try:
        resp = requests.get(url, headers=headers, verify=VERIFY_SSL, timeout=10)
        resp.raise_for_status()
    except requests.RequestException as e:
        fail(f"Failed to fetch system info: {e}")
    return resp.json()

# ----------------------------------------------------------------------
# 3️⃣ GET current firmware version
# ----------------------------------------------------------------------
def get_firmware_version(token: str) -> str:
    url = f"{BASE_URL}/system/firmware"
    headers = {**HEADERS, "Authorization": f"Bearer {token}"}
    try:
        resp = requests.get(url, headers=headers, verify=VERIFY_SSL, timeout=10)
        resp.raise_for_status()
    except requests.RequestException as e:
        fail(f"Failed to fetch firmware version: {e}")
    data = resp.json()
    # Expected format: {"primary": "10.04.0010", "secondary": "10.04.0009", ...}
    return data.get("primary", "unknown")

# ----------------------------------------------------------------------
# 4️⃣ OPTIONAL: Upload firmware image (streaming with progress bar)
# ----------------------------------------------------------------------
def upload_firmware(token: str, image_url: str) -> bool:
    """
    Downloads the .swi file from `image_url` and POSTs it to the switch.
    Returns True on success.
    """
    # 4a – fetch the image (stream to avoid loading huge file into RAM)
    try:
        img_resp = requests.get(image_url, stream=True, timeout=30)
        img_resp.raise_for_status()
    except requests.RequestException as e:
        fail(f"Unable to download firmware image from {image_url}: {e}")

    total = int(img_resp.headers.get("content-length", 0))
    upload_url = f"{BASE_URL}/system/firmware/upload"
    headers = {**HEADERS, "Authorization": f"Bearer {token}"}

    # Use requests' toolkit to stream the file directly
    try:
        with tqdm(total=total, unit='B', unit_scale=True,
                  desc="Uploading firmware") as pbar:
            def read_chunk():
                for chunk in img_resp.iter_content(chunk_size=8192):
                    if chunk:
                        pbar.update(len(chunk))
                        yield chunk

            resp = requests.post(
                upload_url,
                headers=headers,
                data=read_chunk(),
                verify=VERIFY_SSL,
                timeout=(10, None)  # connect timeout, no read timeout
            )
            resp.raise_for_status()
    except requests.RequestException as e:
        fail(f"Firmware upload failed: {e}")

    # The API returns JSON with a status field
    result = resp.json()
    if result.get("status") == "success":
        print("[INFO] Firmware image uploaded successfully.")
        return True
    else:
        fail(f"Upload rejected by switch: {result}")
        return False

# ----------------------------------------------------------------------
# 5️⃣ OPTIONAL: Activate uploaded firmware and reload
# ----------------------------------------------------------------------
def activate_and_reload(token: str, firmware_slot: str = "primary") -> None:
    """
    Sets the chosen slot as the next boot image and triggers a reload.
    """
    url = f"{BASE_URL}/system/firmware/activate"
    headers = {**HEADERS, "Authorization": f"Bearer {token}"}
    payload = {"slot": firmware_slot}
    try:
        resp = requests.post(url, json=payload, headers=headers,
                             verify=VERIFY_SSL, timeout=10)
        resp.raise_for_status()
    except requests.RequestException as e:
        fail(f"Failed to activate firmware: {e}")

    print(f"[INFO] Firmware slot '{firmware_slot}' marked for next boot.")
    # Initiate reload (optional – you may want to schedule this manually)
    reload_url = f"{BASE_URL}/system/reload"
    try:
        reload_resp = requests.post(reload_url, headers=headers,
                                    verify=VERIFY_SSL, timeout=10)
        reload_resp.raise_for_status()
        print("[INFO] Reload request accepted. Switch will reboot shortly.")
    except requests.RequestException as e:
        fail(f"Reload request failed: {e}")

# ----------------------------------------------------------------------
# Main driver
# ----------------------------------------------------------------------
def main():
    if not all([SWITCH_IP, USERNAME, PASSWORD]):
        fail("Missing required environment variables: SWITCH_IP, USERNAME, PASSWORD")

    print("[STEP] Authenticating...")
    token = get_auth_token()
    print("[OK] Token acquired.")

    print("[STEP] Fetching system info...")
    sys_info = get_system_info(token)
    print(f"[OK] Hostname: {sys_info.get('hostname')}, MAC: {sys_info.get('baseMacAddress')}")

    print("[STEP] Checking current firmware version...")
    current_ver = get_firmware_version(token)
    print(f"[INFO] Current primary firmware: {current_ver}")

    # ------------------------------------------------------------------
    # Compare against the known‑good patched version (example)
    # ------------------------------------------------------------------
    PATCHED_VERSION = "10.04.0015"   # <-- replace with the version HPE released for the RCE fix
    if current_ver == PATCHED_VERSION:
        print("[SUCCESS] Switch already runs the patched firmware. No action needed.")
        return

    print(f"[WARN] Firmware is outdated ({current_ver} < {PATCHED_VERSION}).")
    if not FIRMWARE_URL:
        fail("FIRMWARE_URL not set – cannot proceed with automatic patch.")
    
    print("[STEP] Uploading patched firmware image...")
    if not upload_firmware(token, FIRMWARE_URL):
        return  # upload_firmware already printed error and exited

    print("[STEP] Activating new image and scheduling reload...")
    activate_and_reload(token, firmware_slot="primary")
    print("[DONE] Patch process completed. Monitor the switch for reboot.")

if __name__ == "__main__":
    main()

How to run

# 1️⃣ Copy the script to a file, e.g. aosxcx_patch.py
# 2️⃣ Create a .env file (see Step 4)
# 3️⃣ Execute
python aosxcx_patch.py

3.2 JavaScript / TypeScript (`aosxcx_patch.ts`)

/**
 * HPE AOS‑CX RCE patch helper – TypeScript version.
 * Demonstrates login, firmware version check, optional upload & activation.
 */

import * as dotenv from "dotenv";
import axios, { AxiosInstance, AxiosResponse } from "axios";
import { createWriteStream, promises as fs } from "fs";
import https from "https";
import { pipeline } from "stream";
import { promisify } from "util";

dotenv.config(); // loads .env into process.env

const {
  SWITCH_IP,
  USERNAME,
  PASSWORD,
  FIRMWARE_URL,
  VERIFY_SSL = "true",
} = process.env;

if (!SWITCH_IP || !USERNAME || !PASSWORD) {
  console.error(
    "[ERROR] Missing required env vars: SWITCH_IP, USERNAME, PASSWORD"
  );
  process.exit(1);
}

const VERIFY = VERIFY_SSL.toLowerCase() === "true";
const BASE_URL = `https://${SWITCH_IP}/rest/v1`;

const httpsAgent = new https.Agent({
  rejectUnauthorized: VERIFY, // false => ignore self‑signed certs (lab only)
});

const api: AxiosInstance = axios.create({
  baseURL: BASE_URL,
  httpsAgent,
  timeout: 10_000,
  headers: { "Content-Type": "application/json"},
});

/**
 * Simple wrapper that throws a readable error on non‑2xx responses.
 */
async function safeRequest<T>(
  config: Parameters<typeof api>[0]
): Promise<AxiosResponse<T>> {
  try {
    return await api.request<T>(config);
  } catch (err: any) {
    if (err.response) {
      throw new Error(
        `${err.response.status} ${err.response.statusText}: ${JSON.stringify(
          err.response.data
        )}`
      );
    } else if (err.request) {
      throw new Error(`No response received: ${err.message}`);
    } else {
      throw new Error(`Request setup failed: ${err.message}`);
    }
  }
}

/**
 * 1️⃣ Login – returns a Bearer token.
 */
async function login(): Promise<string> {
  const { data } = await safeRequest<{ token: string }>({
    method: "POST",
    url: "/login",
    data: { username: USERNAME, password: PASSWORD },
  });
  if (!data.token) throw new Error("Login succeeded but no token returned.");
  return data.token;
}

/**
 * 2️⃣ Get basic system info (hostname, MAC, etc.)
 */
async function getSystemInfo(token: string) {
  const { data } = await safeRequest<any>({
    method: "GET",
    url: "/system",
    headers: { Authorization: `Bearer ${token}` },
  });
  return data;
}

/**
 * 3️⃣ Get current firmware version (primary slot).
 */
async function getFirmwareVersion(token: string): Promise<string> {
  const { data } = await safeRequest<any>({
    method: "GET",
    url: "/system/firmware",
    headers: { Authorization: `Bearer ${token}` },
  });
  return data.primary ?? "unknown";
}

/**
 * 4️⃣ Download firmware image from a remote URL and stream it to the switch.
 *    Returns true if the switch reports success.
 */
async function uploadFirmware(token: string, imageUrl: string): Promise<boolean> {
  // Fetch the image (stream to avoid buffering huge file)
  const imageResp = await axios.get(imageUrl, {
    responseType: "stream",
    timeout: 30_000,
  });

  const total = parseInt(imageResp.headers["content-length"] ?? "0", 10);
  let uploaded = 0;

  // Progress reporting
  const progress = (chunk: any) => {
    uploaded += chunk.length;
    const pct = total ? ((uploaded / total) * 100).toFixed(1) : "?";
    process.stderr.write(`\rUploading… ${uploaded} B / ${total} B (${pct}%)`);
  };

  imageResp.data.on("data", progress);
  imageResp.data.on("end", () => {
    process.stderr.write("\n");
  });

  const uploadResp = await safeRequest<any>({
    method: "POST",
    url: "/system/firmware/upload",
    headers: {
      Authorization: `Bearer ${token}`,
      "Content-Type": "application/octet-stream",
    },
    data: imageResp.data,
    // axios will pipe the stream; we need to turn off automatic JSON parsing
    transformRequest: [(data) => data],
  });

  // Clean up listener
  imageResp.data.off("data", progress);

  if (uploadResp.data.status === "success") {
    console.log("[INFO] Firmware image uploaded successfully.");
    return true;
  } else {
    console.error(
      `[ERROR] Upload rejected by switch: ${JSON.stringify(uploadResp.data)}`
    );
    return false;
  }
}

/**
 * 5️⃣ Activate the newly uploaded image and trigger a reload.
 */
async function activateAndReload(token: string, slot: string = "primary") {
  // Activate slot
  await safeRequest<any>({
    method: "POST",
    url: "/system/firmware/activate",
    headers: { Authorization: `Bearer ${token}` },
    data: { slot },
  });
  console.log(`[INFO] Firmware slot '${slot}' marked for next boot.`);

  // Issue reload
  await safeRequest<any>({
    method: "POST",
    url: "/system/reload",
    headers: { Authorization: `Bearer ${token}` },
  });
  console.log("[INFO] Reload request accepted. Switch will reboot shortly.");
}

/**
 * Main orchestration
 */
async function main() {
  console.log("[STEP] Authenticating...");
  const token = await login();
  console.log("[OK] Token acquired.");

  console.log("[STEP] Fetching system info...");
  const sysInfo = await getSystemInfo(token);
  console.log(
    `[OK] Hostname: ${sysInfo.hostname}, MAC: ${sysInfo.baseMacAddress}`
  );

  console.log("[STEP] Checking current firmware version...");
  const currentVer = await getFirmwareVersion(token);
  console.log(`[INFO] Current primary firmware: ${currentVer}`);

  const PATCHED_VERSION = "10.04.0015"; // <-- update to the actual fixed version
  if (currentVer === PATCHED_VERSION) {
    console.log("[SUCCESS] Switch already runs the patched firmware.");
    return;
  }

  console.warn(
    `[WARN] Firmware is outdated (${currentVer} < ${PATCHED_VERSION}).`
  );
  if (!FIRMWARE_URL) {
    console.error(
      "[ERROR] FIRMWARE_URL environment variable not set – cannot auto‑patch."
    );
    process.exit(1);
  }

  console.log("[STEP] Uploading patched firmware image...");
  const uploadOk = await uploadFirmware(token, FIRMWARE_URL);
  if (!uploadOk) {
    process.exit(1);
  }

  console.log("[STEP] Activating new image and scheduling reload...");
  await activateAndReload(token, "primary");
  console.log("[DONE] Patch process completed.");
}

// Run
main().catch((err) => {
  console.error("[FATAL]", err);
  process.exit(1);
});

How to run (TS)

# 1️⃣ Save as aosxcx_patch.ts
# 2️⃣ Ensure .env exists (see Step 4)
# 3️⃣ Compile & execute
npx ts-node aosxcx_patch.ts
# or, after compiling:
# npx tsc aosxcx_patch.ts && node aosxcx_patch.js

Step 4: Configuration

Create a file named .env in the project root (never commit this to a public repo!).

Variable	Example	Description
`SWITCH_IP`	`10.1.2.3`	Management IP of the AOS‑CX switch
`USERNAME`	`admin`	Admin or operator username
`PASSWORD`	`s3cureP@ss!`	Password (or use secret‑manager / vault in prod)
`FIRMWARE_URL`	`https://internal-repo.example.com/firmware/AOS-CX_10.04.0015.swi`	HTTP(S) location of the patched `.swi` image
`VERIFY_SSL`	`true`	Set to `false` only in a lab where you use a self‑signed cert (not recommended for prod)

Example .env

SWITCH_IP=10.1.2.3
USERNAME=admin
PASSWORD=s3cureP@ss!
FIRMWARE_URL=https://repo.example.com/firmware/AOS-CX_10.04.0015.swi
VERIFY_SSL=true

Tip: In production you should retrieve PASSWORD (and possibly FIRMWARE_URL) from a secret store (AWS Secrets Manager, HashiCorp Vault, Azure Key Vault, etc.) and inject them as environment variables at runtime.

Step 5: Common Patterns

Pattern	Why it’s useful	Code snippet (Python)
Retry with exponential back‑off	Handles transient network glitches	`python\nimport time, random\nfor attempt in range(5):\n try:\n resp = requests.get(url, headers=hdr, verify=VERIFY_SSL, timeout=10)\n resp.raise_for_status()\n break\n except requests.RequestException as e:\n if attempt == 4: raise\n wait = 2 ** attempt + random.random()\n time.sleep(wait)\n`
Token refresh	Tokens usually expire after ~30 min; re‑login automatically	Wrap every API call in a helper that catches `401` and calls `login()` again.
Streaming large uploads	Avoids loading multi‑hundred‑MB firmware into RAM	See `upload_firmware` (Python) or Axios `responseType: "stream"` (JS).
Structured logging	Makes log aggregation easier	Use `logging` (Python) or `pino`/`winston` (Node) with JSON output.
Context manager for API session	Guarantees cleanup (e.g., closing connections)	`python\nwith requests.Session() as s:\n s.verify = VERIFY_SSL\n s.headers.update({"Authorization": f"Bearer {token}"})\n resp = s.get(...)\n`
Idempotent patch check	Running the script twice does nothing if already patched	Compare current version to the desired version before any upload.

Step 6: Troubleshooting

Symptom	Likely cause	Fix
`401 Unauthorized` after login	Wrong credentials or account locked	Verify username/password; ensure the account has `rest-api` privilege (`show aaa authentication`).
`403 Forbidden` on firmware endpoints	Token lacks required role	Use an admin account or grant the `system` role to the user (`aaa authentication login restrict` etc.).
`SSL: CERTIFICATE_VERIFY_FAILED`	Switch uses a self‑signed cert and `VERIFY_SSL=true`	Either add the switch’s CA to trusted store, or set `VERIFY_SSL=false` only for testing.
Connection timeout (`ReadTimeoutError`)	Switch unreachable, wrong IP, or firewall blocking TCP/443	Ping the IP, confirm HTTPS is enabled (`show running-config
Upload hangs at 0 %	The switch expects `Content-Type: application/octet-stream` but you sent JSON	Ensure the upload request uses the correct content type (see code).
After upload, firmware version unchanged	Image not activated or reload not issued	Call the `/system/firmware/activate` endpoint and then `/system/reload`.
Script exits with “No response received”	The switch closed the connection prematurely (often due to overload)	Add retries, reduce concurrent requests, or increase timeout.
Firmware version reports “unknown”	API path changed in newer/older train	Consult the specific AOS‑CX API reference for your version; adjust the URL accordingly.

Debug tip – enable verbose logging:

Python: logging.basicConfig(level=logging.DEBUG)
Node: set DEBUG=axios:* before running, or pass { validateStatus: () => true } to inspect raw responses.

Step 7: Production Checklist

✅ Item	Reason / Action
Use least‑privilege account	Create a dedicated service account with only `rest-api` and `system` roles.
Store secrets securely	Inject `PASSWORD` and `FIRMWARE_URL` via a secret manager; never hard‑code.
Validate switch certificate	Keep `VERIFY_SSL=true` in production; add the switch’s CA to the trust store if needed.
Test in a lab first	Verify the exact firmware version that resolves CVE‑XXXX (check HPE advisory).
Backup current config & flash	Before any firmware change, run `show running-config` and `copy startup-config tftp:` (or similar).
Schedule a maintenance window	Firmware reload causes traffic disruption; inform stakeholders.
Enable audit logging	On the switch, log all REST API accesses (`aaa accounting exec default start-stop group tacacs+`).
Monitor post‑reload	After reboot, verify `show version` and `show logging` for anomalies.
Rollback plan	Know how to boot the secondary image (`boot system secondary`) if the new image misbehaves.
Document the runbook	Include the exact commands, expected version numbers, and who to call if something fails.
Automate with CI/CD (optional)	For large fleets, wrap the script in a Jenkins/GitLab job that runs only after a manual approval gate.
Validate patch effectiveness	Run a vulnerability scanner (e.g., Nessus, OpenVAS) against the switch management interface to confirm the RCE vector is closed.

🎉 You’re ready!

With the snippets above you can:

Query any HPE Aruba AOS‑CX switch for its current firmware.
Detect whether the critical RCE patch (CVSS 9.8) is already installed.
Download and install the patched image safely, with proper error handling and progress feedback.

Remember to treat the switch like any other production asset: test, backup, approve, and monitor. Happy patching! 🚀

Next Steps

Get API Access - Sign up at the official website
Try the Examples - Run the code snippets above
Read the Docs - Check official documentation
Join Communities - Discord, Reddit, GitHub discussions
Experiment - Build something cool!

HPE Patches Critical RCE Vulnerabilities in AOS-CX

Implementation Guide

HPE AOS‑CX Critical RCE Patch – Developer Guide

Table of Contents

Step 1: Prerequisites

Step 2: Installation & Setup

2.1 Python

2.2 JavaScript / TypeScript

Step 3: Basic Implementation

3.1 Python (`aosxcx_patch.py`)

How to run

3.2 JavaScript / TypeScript (`aosxcx_patch.ts`)

How to run (TS)

Step 4: Configuration

Step 5: Common Patterns

Step 6: Troubleshooting

Step 7: Production Checklist

🎉 You’re ready!

Next Steps

Further Reading

Comments (0)

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HPE Patches Critical RCE Vulnerabilities in AOS-CX

Implementation Guide

HPE AOS‑CX Critical RCE Patch – Developer Guide

Table of Contents

Step 1: Prerequisites

Step 2: Installation & Setup

2.1 Python

2.2 JavaScript / TypeScript

Step 3: Basic Implementation

3.1 Python (aosxcx_patch.py)

How to run

3.2 JavaScript / TypeScript (aosxcx_patch.ts)

How to run (TS)

Step 4: Configuration

Step 5: Common Patterns

Step 6: Troubleshooting

Step 7: Production Checklist

🎉 You’re ready!

Next Steps

Further Reading

Comments (0)

Similar Blogs

Ai • Technology • Machine-learning

VMware Workstation and Fusion Updates Patch Critical Vulnerability

Ai • Technology • Machine-learning

153 Million Driver License Images Offered on Dark Web

Ai • Technology • Machine-learning

The Cybersecurity Apocalypse Is Coming in ‘Months,’ AI Giants Warn

3.1 Python (`aosxcx_patch.py`)

3.2 JavaScript / TypeScript (`aosxcx_patch.ts`)