CVE-2019-25413
📋 TL;DR
Comodo Dome Firewall 2.7.0 contains a reflected cross-site scripting vulnerability in the ID parameter of the /manage/ips/rules/ endpoint. Unauthenticated attackers can inject malicious JavaScript that executes in victim browsers when they visit crafted URLs. This affects all users of Comodo Dome Firewall 2.7.0 with the vulnerable endpoint accessible.
💻 Affected Systems
- Comodo Dome Firewall
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on administrator systems.
Likely Case
Session hijacking leading to unauthorized firewall configuration changes, credential theft, or redirection to phishing sites.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, though some information disclosure may still occur.
🎯 Exploit Status
Exploit code is publicly available on Exploit-DB, making this easily weaponizable by attackers with basic web skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not publicly available
Restart Required: No
Instructions:
Check Comodo's official channels for security updates. Upgrade to the latest version if available. If no patch exists, implement workarounds immediately.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allImplement WAF rules to block malicious script patterns in the ID parameter
Depends on specific WAF platform
Input Validation Filter
allAdd server-side validation to reject or sanitize script tags in the ID parameter
Implementation specific to application code
🧯 If You Can't Patch
- Restrict access to the /manage/ips/rules/ endpoint to trusted IP addresses only
- Implement Content Security Policy (CSP) headers to restrict script execution
🔍 How to Verify
Check if Vulnerable:
Test by accessing https://[firewall-ip]/manage/ips/rules/?id=<script>alert('XSS')</script> and checking if script executesCheck Version:
Check firewall web interface or administrative console for version informationVerify Fix Applied:
Retest with the same payload after implementing fixes to confirm script does not execute📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /manage/ips/rules/ with script tags or JavaScript in ID parameter
- Unusual length or character patterns in ID parameter values
Network Indicators:
- HTTP GET requests containing script payloads in query parameters
- Requests to management interface from unexpected sources
SIEM Query:
source="firewall_logs" AND uri_path="/manage/ips/rules/" AND (query_string CONTAINS "<script>" OR query_string CONTAINS "javascript:")