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XCS: cross channel scripting and its impact on web applications

Posted on : 10-11-2009 | By : Elie Bursztein | In : Article, Publications

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We study the security of embedded web servers used in consumer 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 scripting (XCS). We propose a client-side defense against certain XCS which we implement as a browser extension.

Presented by Hristo at CCS’09 Chicago USA
Paper

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