Abstract: Fuzz testing,as one of the automatic bug detection techniques,has found a large number of bugs in recent years by continuously inputting random or semi-random variant data to the target under test,leading to anomalies or crashes of the target under test.This paper focuses on fuzz testing for network protocol software implementation,and systematically analyses and summarises the research results related to network protocol fuzz testing in recent years.First,the basic process of network protocol fuzz testing is taken as the traction,and the working principle of fuzz testing technology in the testing phases of protocol message pre-processing,test case generation,fuzz test execution,and test anomaly monitoring and other testing phases are elaborated,as well as the progress of its representative research work.Then,through the application of mainstream protocol fuzz testing tools in the large-scale integrated testing of multiple network protocols,the evaluation and validation of mainstream network protocol fuzz testing tools are realised.Finally,the research results in recent years are analysed and summarised.Then,the evaluation and validation of the current mainstream network protocol fuzz testing tools are achieved through the application of mainstream protocol fuzz testing tools in the large-scale integrated testing of multiple network protocols;finally,the future development direction and challenges of network protocol fuzz testing technology are summarised and outlooked.

Key words: Fuzz testing, Vulnerability detection, Network protocols, Test case generation, Protocol reverse engineering