TheoryCSSLP Secure Software Prep Practice Questions
Free CSSLP Secure Software Prep practice questions with answers and plain-English explanations. Browse the PDF, video and online mock test.
CSSLP Secure Software Prep Questions
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Q1During software deployment, which category includes sensitive information like database connection strings and API tokens that need to be secured through encryption and strict access controls?
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✓ Correct answer: Secrets
Answer: Secrets During the deployment and maintenance phases of software development, it is crucial to securely store and manage various types of sensitive information. Examples include: Credentials: These control access to different environments and tools. Each environment and account should have dedicated credentials following the principle of least privilege. Secrets: This category includes data such as database connection strings, API tokens, and other sensitive information which should be protected with encryption and access controls. Keys/Certificates: Proper management of encryption keys and digital certificates is necessary. They should not be embedded directly into the code and should be validated before usage. Configurations: The security configuration of an application must be preserved through access control measures and ensuring the integrity and authenticity of the configuration data.
Q2The terms Transactions, Constrained Transactions, and Well-formed Transactions relate to which of the following security models?
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✓ Correct answer: Clark-Wilson
Answer: Clark-Wilson The Clark-Wilson security model emphasizes the concept of data integrity by defining Constrained Data Items (CDIs), and Unconstrained Data Items (UDIs). Transactions refer to processes that change the state of CDIs while ensuring compliance with integrity policies. Well-formed Transactions are sequences of operations that transition CDIs from one consistent state to another. Bell-LaPadula is a confidentiality protection model that combines attributes of Mandatory Access Control (MAC) and Discretionary Access Control (DAC). Its Simple Security Rule prevents reading data at a higher level of classification, while its * property prevents writing data to a system with a lower classification level. Biba is an integrity model designed to protect higher-level, more trustworthy data from being corrupted by lower-level data. Its no-write-up rule blocks systems from writing data to a system with a higher classification level. Its second rule states that a system reading/processing data from a lower-level system will have its integrity level lowered as a result. Brewer-Nash or the Chinese Wall is a confidentiality model for enterprises. It addresses the case where one group within an organization may have information that cannot be shared with another.
Q3Which of the following security principles is LEAST related to the concept of confidentiality?
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✓ Correct answer: Availability
Answer: Availability Availability is a principle that ensures systems and data are accessible when needed, but it is not directly related to confidentiality. Confidentiality is more concerned with preventing unauthorized access to information. Here are the definitions of the other principles: Encryption: A technique to secure information by transforming it into a coded format that is unreadable without a decryption key. Access Controls: Mechanisms that restrict access to information and resources to only authorized users. Data Hiding: Techniques used to conceal information within other data to prevent unauthorized access or detection.
Q4Which of the following is MOST critical when ensuring the proper actions are taken after discovering a software vulnerability?
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✓ Correct answer: Responsibility
Answer: Responsibility Responsibility: Assigning ownership for ensuring the software vulnerability is assessed, documented, and resolved. This includes determining who is accountable for each action step in the remediation process. Authentication: Verifying the identity of users and administrators who access the systems. Common factors include passwords, tokens, and biometrics. Authorization: Confirming that authenticated users have appropriate permissions to perform certain actions. Typically managed through access controls. Accessibility: Ensuring that the software and data are available to users when needed. This might involve implementing redundant systems, backups, and ensuring minimal downtime.
Q5In a hardware security module (HSM), a random number generator and key generator are part of which of the following?
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✓ Correct answer: Cryptographic Processor
Answer: Cryptographic Processor A hardware security module (HSM) provides hardware protection for cryptographic keys on a system. Key elements include: Cryptographic Processor: The cryptographic processor includes a random number generator, key generators, encryption algorithms, and digital signature algorithms. Secure Memory: Secure memory includes storage for sensitive keys and certificates. Root of Trust: The root of trust ensures that the identity and integrity of the module can be verified. Network Interface: The network interface handles communication between the HSM and other systems but is not involved in cryptographic processing.
Q6Which of the following types of certificates would be most useful in ensuring the integrity and authenticity of a distributed mobile application?
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✓ Correct answer: Software Publisher Certificate
Answer: Software Publisher Certificate Digital certificates have several uses, including: Type of Certificate Purpose Usage Scenario Personal Certificate Uniquely identify a person Secure email or similar functions Server Certificate Prove the identity of a server Enable encryption for SSL/TLS traffic (such as HTTPS) Extended Validation Certificate Provide extra validation of domain ownership by a company Largely deprecated due to vulnerability to attackers registering companies with the same name in different jurisdictions Software Publisher Certificate Digitally sign software Prove the authenticity and integrity of the code
Q7Which of the following is used to manage the dependencies of a software project?
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✓ Correct answer: Package manager
Answer: Package manager Package managers automate the process of installing, upgrading, configuring, and removing software dependencies. Compilers convert source code into machine code. Static linking copies required dependencies into an executable during compilation, creating a faster, easily-distributed, and bloated file. Dynamic linking stores the names and locations of dependencies to be resolved at runtime. It creates smaller files at risk of hijacked dependencies.
Q8Which of the following database architecture models provides the HIGHEST level of data centralization?
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✓ Correct answer: Centralized Database Architecture
Answer: Centralized Database Architecture Some common database architecture models include: Architecture Description Centralized Database Architecture All data is stored and managed in a single central location, providing the highest level of centralization. Distributed Database Architecture Data is distributed across multiple physical locations, enhancing availability and redundancy. Federated Database Architecture Multiple autonomous databases are interconnected, allowing access to data across different systems. Client-Server Database Architecture Clients make requests to a central server, which processes and manages data. It provides a balance between centralization and distribution.
Q9Which of the following is NOT one of the software security requirements recommended in OWASP's Secure Coding Practices?
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✓ Correct answer: Monitor network traffic
Answer: Monitor network traffic The OWASP Secure Coding Practices guide lists several important software security requirements, including: Requirement Input validation Output encoding Authentication and password management Session management Access control Although monitoring network traffic is important for overall security, it is not explicitly listed as a software security coding practice by OWASP.
Q10Which of the following roles is responsible for ensuring the secure configuration and regular patching of servers and network devices?
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✓ Correct answer: System administrator
Answer: System administrator A system administrator is responsible for the upkeep, configuration, and reliable operation of computer systems, especially multi-user computers, such as servers. They ensure that the servers and network devices are securely configured and patched regularly to prevent security vulnerabilities. A network engineer focuses on the design and implementation of network infrastructures, while a security auditor reviews and assesses the effectiveness of security policies and controls. A security manager oversees the security of an organization's information systems but is not typically responsible for the hands-on management of server configurations and patches.
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