Papers › GLITCH: Automated Polyglot Security Smell Detection in Infrastructure as Code
GLITCH: Automated Polyglot Security Smell Detection in Infrastructure as Code
Nuno Saavedra, João F. Ferreira
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Infrastructure as Code (IaC) is the process of managing IT infrastructure via programmable configuration files (also called IaC scripts). Like other software artifacts, IaC scripts may contain security smells, which are coding patterns that can result in security weaknesses. Automated analysis tools to detect security smells in IaC scripts exist, but they focus on specific technologies such as Puppet, Ansible, or Chef. This means that when the detection of a new smell is implemented in one of the tools, it is not immediately available for the technologies supported by the other tools -- the only option is to duplicate the effort. This paper presents an approach that enables consistent security smell detection across different IaC technologies. We conduct a large-scale empirical study that analyzes security smells on three large datasets containing 196,755 IaC scripts and 12,281,251 LOC. We show that all categories of security smells are identified across all datasets and we identify some smells that might affect many IaC projects. To conduct this study, we developed GLITCH, a new technology-agnostic framework that enables automated polyglot smell detection by transforming IaC scripts into an intermediate representation, on which different security smell detectors can be defined. GLITCH currently supports the detection of nine different security smells in scripts written in Ansible, Chef, or Puppet. We compare GLITCH with state-of-the-art security smell detectors. The results obtained not only show that GLITCH can reduce the effort of writing security smell analyses for multiple IaC technologies, but also that it has higher precision and recall than the current state-of-the-art tools.
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