An organization recently updated its security policy to include the following statement:
Regular expressions are included in source code to remove special characters such as $, |, ;. &, `, and ? from variables set by forms in a web application.
Which of the following best explains the security technique the organization adopted by making this addition to the policy?
Input validation is a security technique that checks the user input for any malicious or unexpected data before processing it by the application. Input validation can prevent various types of attacks, such as injection, cross-site scripting, buffer overflow, and command execution, that exploit the vulnerabilities in the application code. Input validation can be performed on both the client-side and the server-side, using methods such as whitelisting, blacklisting, filtering, sanitizing, escaping, and encoding. By including regular expressions in the source code to remove special characters from the variables set by the forms in the web application, the organization adopted input validation as a security technique. Regular expressions are patterns that match a specific set of characters or strings, and can be used to filter out any unwanted or harmful input. Special characters, such as $, |, ;, &, `, and ?, can be used by attackers to inject commands or scripts into the application, and cause damage or data theft. By removing these characters from the input, the organization can reduce the risk of such attacks.
Identify embedded keys, code debugging, and static code analysis are not the security techniques that the organization adopted by making this addition to the policy. Identify embedded keys is a process of finding and removing any hard-coded keys or credentials from the source code, as these can pose a security risk if exposed or compromised. Code debugging is a process of finding and fixing any errors or bugs in the source code, which can affect the functionality or performance of the application. Static code analysis is a process of analyzing the source code without executing it, to identify any vulnerabilities, flaws, or coding standards violations. These techniques are not related to the use of regular expressions to remove special characters from the input.
Reference = CompTIA Security+ SY0-701 Certification Study Guide, page 375-376; Professor Messer's CompTIA SY0-701 Security+ Training Course, video 4.1 - Vulnerability Scanning, 8:00 - 9:08; Application Security -- SY0-601 CompTIA Security+ : 3.2, 0:00 - 2:00.
Which of the following is a type of vulnerability that involves inserting scripts into web-based applications in order to take control of the client's web browser?
Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into a website, which are then executed in the user's web browser, potentially leading to data theft or session hijacking.Reference: Security+ SY0-701 Course Content, Security+ SY0-601 Book.
While reviewing logs, a security administrator identifies the following code:
Which of the following best describes the vulnerability being exploited?
Which of the following aspects of the data management life cycle is most directly impacted by local and international regulations?
Retention policies dictate how long data must be stored to comply with local and international regulations. Non-compliance can result in legal and financial penalties. Reference: CompTIA Security+ SY0-701 Study Guide, Domain 5: Security Program Management, Section: 'Data Retention and Legal Requirements'.
A security engineer at a large company needs to enhance IAM to ensure that employees can only access corporate systems during their shifts. Which of the following access controls should the security engineer implement?
Time-of-day restrictions limit access to corporate systems based on predefined schedules. This ensures employees can only access resources during their assigned work hours. Reference: CompTIA Security+ SY0-701 Study Guide, Domain 3: Security Architecture, Section: 'Access Control Models'.
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