CVE-2019-25410 Overview
CVE-2019-25410 is a reflected cross-site scripting (XSS) vulnerability [CWE-79] in Comodo Dome Firewall 2.7.0. The flaw resides in the policy routing endpoint, where the source and destination parameters are reflected without proper output encoding. Attackers can craft POST requests containing JavaScript payloads in these parameters to execute arbitrary script in an authenticated user's browser session. Successful exploitation requires user interaction, such as clicking a malicious link or submitting a forged form. The vulnerability affects the firewall's web administration interface and can lead to session compromise or unauthorized administrative actions.
Critical Impact
Attackers can execute arbitrary JavaScript in administrator browsers, enabling session theft and unauthorized policy changes on the firewall.
Affected Products
- Comodo Dome Firewall 2.7.0
- Comodo Dome Firewall web administration interface
- Policy routing functionality (policyrouting endpoint)
Discovery Timeline
- 2026-02-19 - CVE-2019-25410 published to NVD
- 2026-02-20 - Last updated in NVD database
Technical Details for CVE-2019-25410
Vulnerability Analysis
The vulnerability is a reflected XSS flaw in the policy routing component of Comodo Dome Firewall 2.7.0. The web interface accepts POST requests targeting the policy routing endpoint and processes user-supplied source and destination parameters. These parameters are echoed back into the rendered HTML response without proper sanitization or context-aware output encoding. An attacker can embed <script> tags or event-handler payloads in either parameter, and the server reflects the payload into the response body. When an authenticated administrator triggers the request, the browser executes the injected script in the context of the firewall's management origin. This permits theft of session cookies, manipulation of the DOM, or issuance of authenticated requests to modify firewall configuration. See the VulnCheck Comodo Advisory for technical details.
Root Cause
The root cause is missing output encoding on reflected request parameters in the policyrouting handler. The server-side template embeds the source and destination values directly into HTML output without HTML-entity encoding or input validation against script metacharacters.
Attack Vector
Exploitation occurs over the network and requires user interaction. An attacker hosts a malicious page or sends a phishing link that submits a crafted POST request to the firewall's policy routing endpoint while the victim is authenticated. The reflected payload then executes within the administrator's browser session. A public proof of concept is available at Exploit-DB #46408.
Detection Methods for CVE-2019-25410
Indicators of Compromise
- POST requests to the Comodo Dome Firewall policyrouting endpoint containing <script>, onerror=, javascript:, or other script metacharacters in the source or destination parameters
- Unexpected administrative actions or configuration changes following an administrator's browsing session
- HTTP referer headers from external or unfamiliar domains preceding access to firewall management URLs
Detection Strategies
- Inspect web server and reverse proxy logs for POST requests to policy routing URLs containing URL-encoded script payloads such as %3Cscript%3E or %3Cimg
- Deploy a web application firewall (WAF) rule that flags HTML or JavaScript metacharacters in source and destination form fields
- Correlate administrator authentication events with subsequent configuration changes to detect session-riding activity
Monitoring Recommendations
- Enable verbose HTTP request logging on the Comodo Dome Firewall management interface and forward logs to a centralized SIEM
- Alert on outbound HTTP requests from administrator workstations to unknown domains shortly after firewall logins, which may indicate cookie exfiltration
- Review firewall audit logs daily for unauthorized policy routing changes or unexpected rule modifications
How to Mitigate CVE-2019-25410
Immediate Actions Required
- Restrict access to the Comodo Dome Firewall web administration interface to a dedicated management network or VPN
- Require administrators to use isolated browser profiles or dedicated jump hosts when managing the firewall
- Train administrators to avoid clicking external links while authenticated to the firewall management console
Patch Information
No vendor advisory or patch URL is listed in the enriched CVE data. Review the Comodo Firewall product page and contact Comodo support for the latest fixed version. Until a confirmed patched release is available, treat version 2.7.0 as vulnerable.
Workarounds
- Place the firewall management interface behind a reverse proxy that strips or encodes script metacharacters in POST parameters
- Enforce a strict Content Security Policy (CSP) via the reverse proxy to block inline script execution on management pages
- Log out of the firewall management console immediately after administrative tasks and clear browser session state
- Disable or restrict use of the policy routing feature if it is not required in the deployment
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
