Snoop Servlet information disclosure
Description
The Snoop Servlet is a diagnostic utility that displays detailed information about incoming HTTP requests, including headers, parameters, cookies, session data, and server environment variables. When left accessible in production environments, this servlet exposes sensitive technical information that can be leveraged by attackers during reconnaissance activities to identify system configurations, software versions, and potential attack vectors.
Remediation
Remove the Snoop Servlet from all production deployments immediately. If the servlet must be retained for diagnostic purposes in non-production environments, implement the following controls:
1. Delete the servlet mapping from web.xml or application configuration files
2. Remove the servlet class files from the deployment package
3. If removal is not possible, restrict access using IP-based filtering or authentication requirements in your web server or application server configuration
4. Implement role-based access control (RBAC) limiting access to administrative users only
5. Regularly audit deployed applications to ensure diagnostic servlets are not inadvertently included in production releases
For web.xml, remove or comment out entries similar to:
<servlet> <servlet-name>SnoopServlet</servlet-name> <servlet-class>SnoopServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>SnoopServlet</servlet-name> <url-pattern>/snoop</url-pattern> </servlet-mapping>