CVE-2019-25409
📋 TL;DR
Comodo Dome Firewall 2.7.0 contains a reflected cross-site scripting vulnerability in the destination parameter of routing endpoints. Attackers can inject malicious JavaScript via POST requests, which executes in victims' browsers when they visit manipulated links. Organizations using Comodo Dome Firewall 2.7.0 are affected.
💻 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 via browser exploitation.
Likely Case
Session hijacking leading to unauthorized firewall configuration changes, credential theft, or phishing attacks against administrators.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, though some information disclosure may still occur.
🎯 Exploit Status
Exploit requires user interaction (clicking malicious link) but no authentication. Public exploit code available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: Not found in provided references
Restart Required: No
Instructions:
Check Comodo vendor website for security updates. Upgrade to latest version if available. If no patch, implement workarounds.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation on the destination parameter to reject script tags and special characters
Not applicable - requires code changes
Output Encoding
allApply proper output encoding when displaying destination parameter values in responses
Not applicable - requires code changes
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads in POST requests
- Restrict access to firewall management interface to trusted IP addresses only
🔍 How to Verify
Check if Vulnerable:
Test by sending POST request to routing endpoint with <script>alert('XSS')</script> in destination parameterCheck Version:
Check firewall web interface or CLI for version informationVerify Fix Applied:
Verify script payloads are properly sanitized or rejected in responses📡 Detection & Monitoring
Log Indicators:
- POST requests to routing endpoints with script-like content in parameters
- Unusual parameter values containing JavaScript syntax
Network Indicators:
- HTTP requests with encoded script tags in POST body parameters
- Traffic to firewall management interface from unexpected sources
SIEM Query:
http.method:POST AND http.uri:"/routing" AND (http.param:*script* OR http.param:*alert*)