NDLI: Analysis of the communication between colluding applications on modern smartphones

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Analysis of the communication between colluding applications on modern smartphones

Content Provider	ACM Digital Library
Author	Marforio, Claudio Ritzdorf, Hubert Capkun, Srdjan Francillon, Aurélien
Abstract	Modern smartphones that implement permission-based security mechanisms suffer from attacks by colluding applications. Users are not made aware of possible implications of application collusion attacks---quite the contrary---on existing platforms, users are implicitly led to believe that by approving the installation of each application independently, they can limit the damage that an application can cause. We implement and analyze a number of covert and overt communication channels that enable applications to collude and therefore indirectly escalate their permissions. Furthermore, we present and implement a covert channel between an installed application and a web page loaded in the system browser. We measure the throughput of all these channels as well as their bit-error rate and required synchronization for successful data transmission. The measured throughput of covert channels ranges from 3.7 bps to 3.27 kbps on a Nexus One phone and from 0.47 bps to 4.22 kbps on a Samsung Galaxy S phone; such throughputs are sufficient to efficiently exchange users' sensitive information (e.g., GPS coordinates or contacts). We test two popular research tools that track information flow or detect communication channels on mobile platforms, and confirm that even if they detect some channels, they still do not detect all the channels and therefore fail to fully prevent application collusion. Attacks using covert communication channels remain, therefore, a real threat to smartphone security and an open problem for the research community.
Starting Page	51
Ending Page	60
Page Count	10
File Format	PDF
ISBN	9781450313124
DOI	10.1145/2420950.2420958
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-12-03
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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