CVE-2019-25412: Comodo Dome Firewall XSS Vulnerability

CVE-2019-25412 Overview

CVE-2019-25412 is a reflected Cross-Site Scripting (XSS) vulnerability affecting Comodo Dome Firewall version 2.7.0. The vulnerability allows attackers to inject malicious scripts by submitting unsanitized input through the NTP_SERVER_LIST parameter. When exploited, attackers can send POST requests to the /korugan/time endpoint with script payloads in the NTP_SERVER_LIST parameter to execute arbitrary JavaScript in users' browsers.

Critical Impact

Successful exploitation enables attackers to execute arbitrary JavaScript in the context of authenticated users' sessions, potentially leading to session hijacking, credential theft, or administrative actions performed on behalf of the victim.

Affected Products

• Comodo Dome Firewall 2.7.0

Discovery Timeline

• 2026-02-19 - CVE CVE-2019-25412 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2019-25412

Vulnerability Analysis

This reflected XSS vulnerability exists in Comodo Dome Firewall's time configuration functionality. The web application fails to properly sanitize user-supplied input in the NTP_SERVER_LIST parameter before reflecting it back in HTTP responses. This missing input validation allows attackers to craft malicious URLs or POST requests that, when processed by the application, inject JavaScript code into the page rendered to the victim.

The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), which represents one of the most common web application security flaws. In this case, the firewall's administrative interface accepts configuration data that should only contain server addresses but instead processes and reflects arbitrary content without encoding.

Root Cause

The root cause is improper input validation and output encoding in the /korugan/time endpoint handler. The application directly reflects the NTP_SERVER_LIST parameter value into the HTML response without sanitizing or encoding special characters such as angle brackets (<, >), quotes, and other HTML/JavaScript metacharacters.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker must craft a malicious request containing JavaScript payload in the NTP_SERVER_LIST parameter and trick an authenticated administrator into executing it. This can be accomplished through:

1. Sending a phishing email containing a malicious link
2. Embedding the exploit in an iframe on a compromised website
3. Social engineering to convince a target to submit a crafted form

The attacker sends a POST request to the /korugan/time endpoint with a crafted NTP_SERVER_LIST parameter containing script tags. When the server processes this request and reflects the unsanitized input, the malicious JavaScript executes in the victim's browser context with full access to the session and DOM.

For detailed technical information and proof-of-concept details, refer to the Exploit-DB #46408 entry and the VulnCheck Advisory on Comodo.

Detection Methods for CVE-2019-25412

Indicators of Compromise

• Unusual POST requests to /korugan/time endpoint containing script tags or encoded JavaScript
• HTTP requests with NTP_SERVER_LIST parameter values containing special characters like <script>, javascript:, or event handlers
• Web application logs showing repeated access to time configuration pages from unexpected sources
• Browser-based alerts or unusual behavior reported by firewall administrators

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block requests containing XSS payloads in POST parameters
• Configure intrusion detection systems to monitor for common XSS patterns in traffic destined for the firewall management interface
• Review web server access logs for suspicious requests targeting the /korugan/time endpoint with encoded or obfuscated payloads

Monitoring Recommendations

• Enable detailed logging for all administrative interface access attempts
• Set up alerting for requests to configuration endpoints containing HTML or JavaScript syntax
• Monitor for anomalous administrative actions that may indicate session hijacking following XSS exploitation

How to Mitigate CVE-2019-25412

Immediate Actions Required

• Restrict administrative interface access to trusted networks only using firewall rules or VPN
• Implement Content Security Policy (CSP) headers to prevent inline script execution
• Educate administrators about the risks of clicking untrusted links while logged into the firewall console
• Consider deploying a reverse proxy with XSS filtering capabilities in front of the management interface

Patch Information

Organizations using Comodo Dome Firewall 2.7.0 should contact Comodo for information about available security updates. For product information and support, refer to the Comodo Firewall Overview page.

Workarounds

• Limit access to the firewall management interface to trusted IP addresses only
• Use separate browser profiles or private browsing when administering the firewall to reduce session hijacking risk
• Implement network segmentation to isolate the firewall management interface from general network traffic
• Deploy a Web Application Firewall with XSS detection capabilities in front of the management interface

# Example: Restrict management interface access via iptables
# Allow only specific admin network to access management port
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP