Verschlagwortet: xss

Remember „semi-persistent“ XSS-attacks?

Remember „semi-persistent“ XSS-attacks?

It was in March of 2008 when I was writing about a third kind of Cross-Site-Scripting attacks, the so called „semi-persistent“ ones. One may prove this at my university’s public library ;-). But here I also have the digital version...

Fortify PHP Webapps against Cross-Site-Scripting

Fortify PHP Webapps against Cross-Site-Scripting

I’ve been working since 2007 to distill a simple method to prevent web applications to be threatened by insecure user input. Here I mean „Cross-Site-Scripting“ in special. After reading some books of well known security specialist, one thing seems sure:...

Cross Site Scripting trotz htmlentities() [UPDATE]

Cross Site Scripting trotz htmlentities() [UPDATE]

Die PHP-Funktion htmlentities() soll vor Cross Site Scripting Angriffen schützen, denn sie kodiert Zeichen wie „„, sowie auch doppelte und einfache Anführungszeichen in deren HTML-Code-Entsprechung um. Dass allerdings die Kodierung der Anführungszeichen explizit eingeschaltet werden muss kann wohl als Designschwäche...