 Role of the Control Owner:

The control owner is responsible for the design, implementation, and maintenance of a specific control.

They have detailed knowledge of the control’s purpose, its intended functionality, and its operational context within the organization.

 Responsibility for Remediation:

When a penetration testing team discovers an ineffectively designed access control, it is the control owner’s responsibility to ensure the design gap is remediated.

The control owner must assess the findings, determine the root cause of the ineffectiveness, and take necessary actions to redesign or enhance the control to address the identified weaknesses.

 Steps to Remediate Control Design Gap:

Assess the Findings:Understand the specific issues identified by the penetration testing team.

Redesign the Control:Modify the control design to address the identified gaps and ensure it meets security requirements.

Implement Changes:Apply the redesigned control and test its effectiveness.

Continuous Monitoring:Regularly review the control to ensure it remains effective over time.

 Comparing Other Roles:

Risk Owner:Manages overall risk but does not directly handle control design.

IT Security Manager:Oversees the security posture but delegates specific control responsibilities to control owners.

Control Operator:Operates the control but is not responsible for its design or remediation.

 References:

The CRISC Review Manual emphasizes the control owner's responsibility in maintaining and improving control effectiveness (CRISC Review Manual, Chapter 3: Risk Response and Mitigation, Section 3.7 Control Design and Selection)​​.