Citibank, N.a.

Ilia Shevrin

Oded Margalit

Uri Kahana

Mickey Hovel

Max Leibovich

Joseph Tal

A model checking system configures a formal compliance document with remediation actions to correct security conflicts in an IAM system. The system applies a model checker on an abstract model of the IAM system to identify security conflicts and identifies remediation actions from the formal compliance document. The system applies the model checker after applying the first remediation action and determines whether the first remediation action creates another security conflict. If a remediation action is identified that does not create a new security conflict, then the system applies the identified remediation action. The formal compliance document is updated accordingly. When an operator revises code for a policy change, the system will apply the model checker on an abstract model of the IAM system with the code revision to identify security conflicts. If new security conflicts are not created in the simulation, then the system may deploy the code revision.

Security remediation

A model checking system detects violations and conflicts in security and verification policies by running model checking processes. The system detects privilege escalation attacks in misconfigured identification and access management ('IAM') policies by modeling security policy documents and IAM actions as logical formulas and then running model checking on the model. The system translates non-Boolean variables, such as string variables, into Boolean variables in order to apply an SAT model checker. The model checker also determines whether a policy violation can be achieved in a finite number of steps by elevating privileges of some compromised principal over multiple iterations of the model checking process, or proves absence thereof.

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Ramat Gan, Israel

Ilia Shevrin