CCIS Seminar - Tuesday 6 October 2009 - CTL
14:00:00 - Salle de CTL

Elie Bursztein, Stanford Security Laboratory

XCS: Cross Channel Scripting and its Impact on Web Applications

Abstract: We study the security of embedded web servers used in con- sumer electronic devices, such as security cameras and photo frames, and for IT infrastructure, such as wireless access points and lights-out management systems. All the devices we examine turn out to be vulnerable to a variety of web attacks, including cross site scripting (XSS) and cross site request forgery (CSRF). In addition, we show that consumer electronics are particularly vulnerable to a nasty form of persistent XSS where a non-web channel such as NFS or SNMP is used to inject a malicious script. This script is later used to attack an unsuspecting user who connects to the device's web server. We refer to web attacks which are mounted through a non-web channel as cross channel script- ing (XCS). We propose a client-side defense again certain XCS which we implement as a browser extension.

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