White Papers

Protecting the Intranet Against "JavaScript Malware" and Related Attacks

Category: Software and Web Development, Security

Overview The networking functionality of JavaScript is restricted by the Same Origin Policy (SOP). However, as the SOP applies on a document level, JavaScript still possesses certain functionality for cross domain communication. These capabilities can be employed by malicious JavaScript to gain access to intranet resources from the outside. This paper exemplifies capabilities of such scripts. To protect intranet hosts against JavaScript based threats, the paper then proposes three countermeasures: Element Level SOP, rerouting of cross-site requests, and restricting the local network. These approaches are discussed concerning their respective protection potential and disadvantages. Based on this analysis, the most promising approach, restricting the local network, is evaluated practically.

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Publisher: Springer Science+Business Media
File Format: PDF
Date Published: Oct 22, 2008
Format: White Papers
Topics: Spyware, Intranet, Network Security

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