Microsoft Frontpage configuration information
Description
This vulnerability occurs when Microsoft FrontPage Server Extensions configuration information is exposed through HTML comments in web pages. The exposed metadata typically includes the FrontPage version number and other configuration details that should remain internal. This information disclosure allows attackers to fingerprint the server technology stack and identify specific versions that may have known vulnerabilities.
Remediation
Remove or restrict access to pages containing FrontPage configuration information in HTML comments. If the affected pages are FrontPage-generated administrative or configuration files (such as _vti_inf.html), configure your web server to deny public access to all files and directories beginning with '_vti_'. For IIS servers, add a request filtering rule to block these paths. For Apache servers, add the following to your .htaccess or server configuration:
# Block access to FrontPage directories
<DirectoryMatch "^/.*/(_vti_|_private)">
Require all denied
</DirectoryMatch>Additionally, review all publicly accessible pages and remove any HTML comments containing version information or configuration details. If FrontPage Server Extensions are no longer needed, consider uninstalling them entirely to eliminate this and related security risks.