Comodo Dome Firewall Reflected Cross-Site Scripting Vulnerability

A reflected cross-site scripting vulnerability has been identified in Comodo Dome Firewall version 2.7.0. This vulnerability allows attackers to inject malicious scripts by sending crafted input to the antispyware endpoint. Exploitation involves POST requests with JavaScript payloads in the DNSMASQ_WHITELIST or DNSMASQ_BLACKLIST parameters, which can execute arbitrary code in the browsers of users.

Impact

Exploitation of this vulnerability allows for reflected cross-site scripting, where injected scripts are executed in the context of the user's browser.

Reproduction

To reproduce this vulnerability, send a POST request to the antispyware endpoint of Comodo Dome Firewall 2.7.0. Include a JavaScript payload in either the DNSMASQ_WHITELIST or DNSMASQ_BLACKLIST parameter. The injected script will be executed in the user's browser, demonstrating the cross-site scripting vulnerability.