NetProwler 3.5.1 SU4 introduces signatures that detect escaped characters within a URL, directory traversals within a URL, multiple web server CGI vulnerabilities, HTML formatted e-mails that use frames, and buffer overflow style attacks for FTP services. It also strengthens the already existing NetProwler Stacheldraht signatures. You may obtain NetProwler 3.5.1 SU4 through the product's auto update feature.