A Security Domain Model for Static Analysis and Verification of Software Programs
Shaffer, Alan B.
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Unauthorized information flows can result from malicious software exploiting covert channels and overt flaws in access control design. To address this problem, we present a precise, formal definition for information flow that relies on control flow dependency tracing through program execution, and extends Dennings’ and follow-on classic work in secure information flow . We describe a formal security Domain Model (DM) for conducting static analysis of programs to identify illicit information flows, access control flaws and covert channel vulnerabilities. The DM is comprised of an Invariant Model, which defines the generic concepts of program state, information flow, and security policy rules; and an Implementation Model, which specifies the behavior of a target program. The DM is compiled from a representation of the program, written in a domain-specific Implementation Modeling Language (IML), and a specification of the security policy written in Alloy. The Alloy Analyzer tool is used to perform static analysis of the DM to automatically detect potential covert channel vulnerabilities and security policy violations in the target program.
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