Security

Detecting Vulnerabilities in C Programs Using Trace-Based Testing

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Executive Summary

Security testing has gained significant attention recently due to frequent attacks against software systems. This paper presents a trace-based security testing approach. It reuses test cases generated from previous testing methods to produce execution traces. An execution trace is a sequence of program statements exercised by a test case. Each trace is symbolically executed to produce program constraints and security constraints. A program constraint is a constraint imposed by program logic on program variables. A security constraint is a condition on program variables that must be satisfied to ensure system security. A security flaw exists if there is an assignment of values to program variables that satisfies the program constraint but violates the security constraint.

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