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Questions and Answers
What is a key component of a secure SDLC process?
What is a key component of a secure SDLC process?
Malicious insider threats are categorized as unintentional threats.
Malicious insider threats are categorized as unintentional threats.
False
Name one reason why vulnerabilities in released software may not be addressed in a timely manner.
Name one reason why vulnerabilities in released software may not be addressed in a timely manner.
Lack of resources or prioritization.
Threats can be categorized based on their __________.
Threats can be categorized based on their __________.
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Match the following threat types with their descriptions:
Match the following threat types with their descriptions:
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What should be included in secure project management?
What should be included in secure project management?
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Vulnerabilities should be resolved by issuing patches without investigating root causes.
Vulnerabilities should be resolved by issuing patches without investigating root causes.
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Identify one element that supports secure sustainment in software development.
Identify one element that supports secure sustainment in software development.
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What is one of the main properties of secure software?
What is one of the main properties of secure software?
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The execution environment does not affect software security.
The execution environment does not affect software security.
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What should practitioners have to ensure software security?
What should practitioners have to ensure software security?
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The software's installer may fail to ________ the host platform.
The software's installer may fail to ________ the host platform.
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Match the stages of the software life cycle with their associated threats:
Match the stages of the software life cycle with their associated threats:
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During which phase are the user organization's responsibilities especially important?
During which phase are the user organization's responsibilities especially important?
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What is the primary goal of secure software development?
What is the primary goal of secure software development?
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Commercial-off-the-shelf (COTS) components do not need to be evaluated for security.
Commercial-off-the-shelf (COTS) components do not need to be evaluated for security.
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What is the primary goal of survivability in software security?
What is the primary goal of survivability in software security?
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Secure software is defined by its ability to correctly authenticate users.
Secure software is defined by its ability to correctly authenticate users.
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Name one key element of a secure Software Development Life Cycle (SDLC).
Name one key element of a secure Software Development Life Cycle (SDLC).
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The professionals who are not typically involved in the software development process include ______.
The professionals who are not typically involved in the software development process include ______.
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Match each role with its description in the software development process:
Match each role with its description in the software development process:
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Which of the following is a common threat that targets software?
Which of the following is a common threat that targets software?
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Software configuration managers play a crucial role in secure software development.
Software configuration managers play a crucial role in secure software development.
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What is one impact that can result from a successful software attack?
What is one impact that can result from a successful software attack?
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What is the primary difference between an 'attack' and an 'exploit'?
What is the primary difference between an 'attack' and an 'exploit'?
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Intentional but not malicious threats target software with deliberate malice.
Intentional but not malicious threats target software with deliberate malice.
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What does it mean for a software application to have 'world' write permissions?
What does it mean for a software application to have 'world' write permissions?
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A programmer who includes exploitable flaws and a backdoor in source code engages in _____ behavior.
A programmer who includes exploitable flaws and a backdoor in source code engages in _____ behavior.
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Match the following terms with their definitions:
Match the following terms with their definitions:
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Give an example of a threat that can occur during the deployment phase.
Give an example of a threat that can occur during the deployment phase.
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In which scenario does a user input unrelated to a security concern occur?
In which scenario does a user input unrelated to a security concern occur?
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Indirect attacks exclusively target the software itself.
Indirect attacks exclusively target the software itself.
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What can intentional changes to the execution environment result in?
What can intentional changes to the execution environment result in?
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External services can provide protection against direct attacks.
External services can provide protection against direct attacks.
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Name one type of malicious code trigger.
Name one type of malicious code trigger.
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Software can be vulnerable to direct attacks if failures occur in __________ protections.
Software can be vulnerable to direct attacks if failures occur in __________ protections.
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Match the types of input data with their purpose in delivering malicious payloads:
Match the types of input data with their purpose in delivering malicious payloads:
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Which of the following is NOT a potential impact of a successful attack?
Which of the following is NOT a potential impact of a successful attack?
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Malicious code can be triggered by the opening or closing of files.
Malicious code can be triggered by the opening or closing of files.
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What are three types of potential attack paths mentioned?
What are three types of potential attack paths mentioned?
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The use of __________ lists might open up a software system to vulnerabilities.
The use of __________ lists might open up a software system to vulnerabilities.
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What is one way an attacker may deliver malicious code?
What is one way an attacker may deliver malicious code?
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Study Notes
Secure Software Development
- The primary goal is to integrate security considerations and principles into software development practices and processes.
Main Purpose
- Secure software development aims to equip developers, integrators, and testers with the knowledge needed to produce secure software.
Intended Software Practitioners
- This knowledge is relevant for various roles including requirements analysts, architects, programmers, testers, maintainers, software integrators, security experts, software configuration managers, and project technical leads.
What Is Secure Software?
- Secure software should be dependable, trustworthy, and survivable.
- Dependable software functions predictably and correctly under all conditions, including attacks.
- Trustworthy software does not contain malicious logic that causes harmful behavior.
- Survivable software recovers quickly from attacks, minimizing damage.
Factors Influencing Software Security
- Development principles and practices adopted
- Practitioner knowledge: security awareness and expertise amongst developers, designers, and testers
- Development tools used
- Acquired components: evaluation of chosen commercial-off-the-shelf (COTS) and open-source software (OSS) components
- Deployment configuration: how software is installed and configured
Threats to Software Throughout Its Lifecycle
- During development: unintentional or intentional code corruption by developers
- During deployment: insecure configuration by administrators, failure to apply patches and updates
- During operation: vulnerabilities exposed on network-connected platforms, potential threats from malicious insiders, and exploitation by external attackers
- During sustainment: failure to address discovered vulnerabilities in a timely manner, missing root cause analysis for vulnerability prevention
Key Elements of a Secure SDLC Process
- Security criteria in SDLC checkpoints
- Secure software principles and practices
- Adequate architecture and design requirements
- Secure coding integration
- Secure software distribution and deployment
- Secure testing
- Secure configuration management
- Secure project management and upper management commitment
- Supportive development tools
- Security-knowledgeable developers
Threats Targeting Software
- A threat is any actor, action, or event capable of causing harm to a system, data, or resources.
- Malicious threats are realized through attacks.
- Attacks, often synonymous with "exploits", target vulnerabilities in software.
- Exploits are techniques or malicious code used to carry out an attack.
Types of Threats
- Unintentional: arise from mistakes or ignorance, like a developer using unsafe library calls or an administrator granting incorrect permissions.
- Intentional but non-malicious: stem from negligence or pressure, like a developer skipping security reviews due to deadlines.
- Intentional and malicious: involve deliberate attempts to harm, like intentional code flaws or leaving default passwords unchanged.
Indirect Attacks
- These attacks don't target the software directly but create vulnerabilities.
- Examples include triggering external faults, introducing changes to the execution environment, and exploiting vulnerabilities in external services.
Attack Paths
- Attackers exploit vulnerabilities in network elements, software elements, or the execution environment.
- Network elements include network services, ports, and security devices.
- Software elements include software services, APIs, RPCs, and malicious code.
- Execution environment vulnerabilities include operating system flaws, runtime system weaknesses, or virtual machine vulnerabilities.
Potential Impacts of Successful Attacks
- Unexpected or unauthorized software execution
- Unauthorized access to software, resources, or data
- Unauthorized modifications to software, resources, or data
- Denial of Service for the software, resources, or data
Types of Input Data Delivering Malicious Payloads
- Command line parameters
- Environmental variables
- URLs
- Filename references
- Uploaded file content
- Flat file imports
- HTTP headers
- HTTP GET parameters
- Form fields (including hidden fields)
- Selection lists and drop-down lists
- Cookies
- Java applet communications
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Description
This quiz explores the principles and practices of secure software development. It is designed for software practitioners to understand the importance of security in their development processes. Learn how to create software that is dependable, trustworthy, and survivable against attacks.
