CVE-2024-10286
📋 TL;DR
A Cross-Site Scripting (XSS) vulnerability in LocalServer 1.0.9 allows remote attackers to inject malicious scripts via the /testmail/index.php parameter. This could enable session hijacking or credential theft when authenticated users visit manipulated pages. Only LocalServer 1.0.9 installations with the vulnerable component are affected.
💻 Affected Systems
- LocalServer
📦 What is this software?
Localserver by Ujangrohidin
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover, session hijacking, and potential lateral movement within the application if the stolen session has administrative privileges.
Likely Case
Session theft leading to unauthorized access to the LocalServer application, potentially exposing sensitive configuration data or allowing further attacks.
If Mitigated
Limited impact with proper input validation, output encoding, and Content Security Policy (CSP) headers in place.
🎯 Exploit Status
Exploitation requires social engineering to trick authenticated users into clicking malicious links. The vulnerability itself is straightforward to exploit once the attack vector is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-xss-vulnerabilities-localserver
Restart Required: No
Instructions:
1. Check the vendor advisory for updates. 2. If no patch is available, implement workarounds. 3. Monitor for official patches from the LocalServer developers.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement server-side validation and sanitization of all user inputs to the /testmail/index.php parameter.
Disable Vulnerable Component
linuxTemporarily disable or restrict access to /testmail/index.php if not required for operations.
# Example for Apache: Redirect /testmail/index.php to a safe page or return 403
Redirect 403 /testmail/index.php
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with XSS protection rules to block malicious payloads.
- Enforce Content Security Policy (CSP) headers to mitigate script injection impact.
🔍 How to Verify
Check if Vulnerable:
Test by attempting to inject a simple script payload into the /testmail/index.php parameter and checking if it executes in the browser.Check Version:
Check the LocalServer version in its configuration files or admin interface; specific command depends on installation.Verify Fix Applied:
After applying fixes, retest the injection to ensure scripts no longer execute and inputs are properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual or malformed requests to /testmail/index.php with script tags or JavaScript payloads in parameters.
Network Indicators:
- HTTP requests containing suspicious strings like <script>, javascript:, or encoded payloads targeting /testmail/index.php.
SIEM Query:
source="web_logs" AND uri="/testmail/index.php" AND (param CONTAINS "<script>" OR param CONTAINS "javascript:")