Combating Java Deserialization Vulnerabilities with Look-Ahead Object Input Streams (LAOIS)


Java Serialization is an important and useful feature of Core Java that allows developers to transform a graph of Java objects into a stream of bytes for storage or transmission and then back into a graph of Java objects. Unfortunately, the Java Serialization architecture is highly insecure and has led to numerous vulnerabilities, including remote code execution (RCE) and denial-of-service (DoS) attacks. Any Java program that deserializes a stream is susceptible to such vulnerabilities unless proper mitigations are taken. One such mitigation strategy is look-ahead deserialization or look-ahead object input streams (LAOIS). This whitepaper examines Java deserialization vulnerabilities and evaluates various LAOIS solutions including JDK Enhancement Proposal (JEP) 290.


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Published date:  16 June 2017

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