CVE-2018-7633
📋 TL;DR
This vulnerability allows attackers to inject and execute arbitrary JavaScript code through the Language parameter in the /ui/login form of Epicentro E firmware. Attackers can exploit this by tricking users into making manipulated POST requests, potentially leading to session hijacking, credential theft, or further system compromise. Affected systems are ADB firmware Epicentro E version 7.3.2 and potentially later versions.
💻 Affected Systems
- ADB firmware Epicentro E
📦 What is this software?
Epicentro by Adbglobal
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through session hijacking, credential theft, and potential lateral movement within the network.
Likely Case
Session hijacking, credential theft, and unauthorized access to the affected device's administrative interface.
If Mitigated
Limited impact with proper input validation, output encoding, and security controls in place.
🎯 Exploit Status
Exploitation requires social engineering to trick users into submitting malicious requests. The vulnerability itself is straightforward to exploit once the malicious request is crafted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not publicly available
Restart Required: No
Instructions:
Check with ADB for firmware updates. If unavailable, implement workarounds and monitor for patches.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement server-side validation and sanitization of the Language parameter to reject malicious input.
Web Application Firewall (WAF)
allDeploy a WAF with rules to block malicious JavaScript injection attempts in POST parameters.
🧯 If You Can't Patch
- Restrict network access to the device's web interface using firewall rules or network segmentation.
- Implement strong authentication mechanisms and monitor for unusual login attempts or parameter tampering.
🔍 How to Verify
Check if Vulnerable:
Test by submitting a POST request to /ui/login with a Language parameter containing JavaScript payload (e.g., <script>alert('test')</script>) and check if it executes.Check Version:
Check firmware version via device web interface or administrative console.Verify Fix Applied:
Retest with the same payload after applying fixes; ensure JavaScript does not execute and input is properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /ui/login with JavaScript or HTML in parameters
- Multiple failed login attempts with suspicious parameter values
Network Indicators:
- HTTP traffic to /ui/login with encoded or obfuscated JavaScript in POST data
SIEM Query:
source="web_logs" AND uri_path="/ui/login" AND (http_method="POST") AND (param_value CONTAINS "<script>" OR param_value CONTAINS "javascript:")