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Erschienen in:
2008 | OriginalPaper | Buchkapitel
A Self-learning System for Detection of Anomalous SIP Messages
verfasst von : Konrad Rieck, Stefan Wahl, Pavel Laskov, Peter Domschitz, Klaus-Robert Müller
Erschienen in: Principles, Systems and Applications of IP Telecommunications. Services and Security for Next Generation Networks
Verlag: Springer Berlin Heidelberg
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Current Voice-over-IP infrastructures lack defenses against unexpected network threats, such as zero-day exploits and computer worms. The possibility of such threats originates from the ongoing convergence of telecommunication and IP network infrastructures. As a countermeasure, we propose a self-learning system for detection of unknown and novel attacks in the Session Initiation Protocol (SIP). The system identifies anomalous content by embedding SIP messages to a feature space and determining deviation from a model of normality. The system adapts to network changes by automatically retraining itself while being hardened against targeted manipulations. Experiments conducted with realistic SIP traffic demonstrate the high detection performance of the proposed system at low false-positive rates.