CVE-2019-25414: Comodo Dome Firewall XSS Vulnerability

CVE-2019-25414 Overview

CVE-2019-25414 is a reflected cross-site scripting (XSS) vulnerability affecting Comodo Dome Firewall version 2.7.0. This security flaw allows unauthenticated attackers to inject malicious scripts by manipulating the ID parameter in requests to the /manage/ips/appid/ endpoint. When successfully exploited, attackers can execute arbitrary JavaScript code in the context of victim browsers, potentially leading to session hijacking, credential theft, or further compromise of the affected system.

Critical Impact

Unauthenticated attackers can execute arbitrary JavaScript in victim browsers by crafting malicious URLs with script payloads in the ID parameter, potentially compromising administrator sessions and firewall configurations.

Affected Products

• Comodo Dome Firewall 2.7.0
• Comodo Dome Firewall web management interface
• Systems with the /manage/ips/appid/ endpoint exposed

Discovery Timeline

• 2026-02-19 - CVE CVE-2019-25414 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2019-25414

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The flaw exists in the Comodo Dome Firewall web management interface, specifically within the application identification management functionality.

The vulnerability allows unauthenticated remote attackers to inject malicious JavaScript code through the ID parameter without proper input sanitization. When an administrator or authenticated user clicks on a crafted malicious link, the injected script executes within their browser session, inheriting their authentication context and privileges.

Given the nature of firewall management interfaces, successful exploitation could allow attackers to modify firewall rules, exfiltrate configuration data, or establish persistent access to the network infrastructure.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding in the Comodo Dome Firewall web application. The /manage/ips/appid/ endpoint fails to properly sanitize the ID parameter before reflecting it back in the HTTP response. Without adequate encoding of user-supplied input, script payloads embedded in the parameter are rendered as executable code rather than being treated as data.

Attack Vector

The attack vector for this vulnerability is network-based and requires user interaction. An attacker crafts a malicious URL containing JavaScript code in the ID parameter and delivers it to a victim through social engineering techniques such as phishing emails, malicious websites, or instant messages.

When an authenticated administrator clicks the crafted link, the malicious script executes in their browser with the same privileges as the legitimate application. The attacker can leverage this to steal session cookies, perform actions on behalf of the administrator, or redirect them to malicious sites.

The vulnerability is exploitable through the /manage/ips/appid/ endpoint where the ID parameter is reflected without proper sanitization. Detailed technical information and proof-of-concept code can be found in the Exploit-DB #46408 advisory.

Detection Methods for CVE-2019-25414

Indicators of Compromise

• HTTP requests to /manage/ips/appid/ containing script tags or JavaScript event handlers in URL parameters
• Unusual URL patterns with encoded characters such as %3Cscript%3E or javascript: in the ID parameter
• Web access logs showing requests with XSS payloads targeting the application management interface

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block common XSS patterns in URL parameters
• Monitor HTTP request logs for suspicious payloads containing <script>, onerror, onload, or similar JavaScript injection patterns
• Implement content security policy (CSP) headers to mitigate the impact of successful XSS attacks
• Review access logs for anomalous requests to the /manage/ips/appid/ endpoint

Monitoring Recommendations

• Enable detailed logging for all requests to the Comodo Dome Firewall web management interface
• Set up alerts for requests containing encoded special characters in URL parameters
• Monitor for unauthorized configuration changes that could indicate post-exploitation activity
• Implement session monitoring to detect potential session hijacking attempts

How to Mitigate CVE-2019-25414

Immediate Actions Required

• Restrict access to the Comodo Dome Firewall web management interface to trusted IP addresses only
• Implement network segmentation to limit exposure of the management interface
• Deploy a web application firewall with XSS protection rules in front of the management interface
• Educate administrators about phishing attacks and the risks of clicking untrusted links while authenticated

Patch Information

Organizations should contact Comodo directly for information regarding security patches or updated firmware versions that address this vulnerability. Additional details can be found through the VulnCheck Advisory on Comodo and the Comodo Firewall Overview pages.

Workarounds

• Restrict management interface access to internal networks only using firewall rules or network ACLs
• Implement multi-factor authentication for administrative access to reduce session hijacking risk
• Configure strict Content-Security-Policy headers to prevent inline script execution
• Use a separate browser profile or session for firewall administration tasks

# Configuration example - Restrict access to management interface by IP
# Example iptables rules to limit access to management interface
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP

# Enable CSP headers in reverse proxy configuration (nginx example)
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none';" always;