Corrective Controls

5 minutes 5 Questions

Corrective controls are designed to correct the effects of security incidents that have occurred. They are used to respond to security breaches and restore normal operations, including the implementation of measures to mitigate further incidents. Corrective controls include backup/restoration, patches, system reconfiguration, quarantine tools, and incident-response procedures. In a CISSP course, understanding the role and design of corrective controls is essential to creating effective security solutions and recovering from security incidents.

Corrective Controls: A Comprehensive Guide

The Corrective Controls are crucial components of an integrated security system which are designed to rectify any security breaches or vulnerabilities that have been detected in the system. They play a vital role in altering system settings and modifying the environment to remove or minimize the negative impacts of a security incident.

Importance: The significance of Corrective Controls emanates from their ability to take remedial action post-incident to limit damage, restore the system to full functionality, and prevent future occurrences. They are vital in the incident response process, where they not only rectify the detected vulnerabilities but also prevent further exploitation of those vulnerabilities.

How it works: Corrective Controls operate by first diagnosing the vulnerabilities or the causes of the security incident. Post identification, these controls work to restore the system parameters to their normal settings. They also develop and implement changes to the system to avoid similar incidents in the future. This may involve system patches, modifications in system architecture, or changes in security protocols.

Exam Tips: Answering Questions on Corrective Controls
When answering questions about Corrective Controls in an exam, it's important to:

Understand the Function: Corrective Controls function to rectify system vulnerabilities and improve security protocols. They are the next line of defense after detective controls.
Identify Different Forms: Corrective Controls can come in many forms including system patches, architecture changes, and protocol modifications.
Know their Place in Incident Response: Remember, Corrective Controls are crucial in incident response, rectifying vulnerabilities, and preventing future incidents.

Knowing these key points and understanding the pivotal role of Corrective Controls in maintaining system security will aid in effectively answering related questions in the exam.

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Question 1

A company experienced a data breach due to an SQL injection attack. What corrective control should be implemented to prevent further attacks?

Regularly updating antivirus software Input validation Encrypting sensitive data Implementing a firewall

Correct Answer: Input validation

Input validation is the appropriate corrective control in this scenario, as it will prevent malicious code from being executed via the SQL injection. The other options are important for overall security but do not directly address the specific vulnerability that led to the data breach.

Question 2

A small business has suffered a ransomware attack that has encrypted critical files. What corrective control should they implement to regain access to their data?

Restore from backup Pay the ransom Reformat the affected systems Upgrade antivirus software

Correct Answer: Restore from backup

Restoring from backup is the appropriate corrective control for recovering encrypted files without giving in to the attacker's demands. Paying the ransom is not recommended, as it encourages future attacks and does not guarantee file recovery. Other options might help prevent future attacks but will not recover the encrypted files.

Question 3

An employee accidentally deleted sensitive files. How should the company proceed to implement a corrective control?

Updating the company's security policies Monitoring user access controls Restore from backup Encrypting data at rest

Correct Answer: Restore from backup

Restoring from backup is the best corrective control in this situation, as it directly addresses the loss of data by returning the deleted files to the system. The other options focus on prevention and mitigation of future risks but do not resolve the immediate issue of missing files.

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