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Difficulty: HardChange Management and Security Impacts

An enterprise network engineering team is preparing to deploy an automated microsegmentation policy across multi-tenant cloud virtual networks during a scheduled maintenance window. The submitted change request includes implementation timelines, interface configuration backups, and automated rollback scripts triggered by network latency thresholds. During the Change Advisory Board (CAB) security impact review, a security analyst notes that the backout plan restores default port settings but does not restore tenant isolation access control lists (ACLs) or cryptographic session states. Which of the following security risks is most likely to occur if this rollback plan is executed as written?

  1. The network environment could be left in an inconsistent configuration state with residual permissive access, exposing tenant workloads to unauthorized lateral movement.Answer
  2. B
    The core routers will sustain application-layer buffer overflow vulnerabilities that require host software patches rather than network rollback steps.
  3. C
    The change management workflow will misclassify the microsegmentation policy as a deterrent administrative control instead of a preventive technical control.
  4. D
    The automated backout script will reclassify all future standard change requests as emergency changes, permanently bypassing Change Advisory Board approval.

Answer

Executing a backout plan that fails to restore tenant access control lists and isolation rules leaves residual permissive configurations, introducing severe lateral movement risks.
A comprehensive security impact assessment during change management requires verifying that backout and rollback plans restore all security controls—including access control lists and tenant isolation rules—to a verified baseline state. Restoring network interface hardware settings without restoring security policy dependencies leaves the network in a permissive, insecure state, exposing systems to lateral movement.

Step-by-Step Solution

1
Analyze the change management proposal and proposed backout procedure
Identified that the rollback script restores interface defaults but omits tenant ACL state restoration
Change management security impact assessments must evaluate backout scenarios as thoroughly as primary deployment steps
2
Evaluate the security impact of an incomplete rollback plan
Discovered that uncoordinated interface resets leave microsegmentation boundaries open or improperly defined
Security dependencies (such as ACL integrity and isolation boundaries) must be preserved during backout execution to maintain baseline protection
3
Determine the primary risk exposure resulting from CAB approval without remediation
Residual permissive rules create unauthorized network paths between isolated tenant workloads
Inconsistent state rollbacks compromise confidentiality and integrity by exposing assets to potential lateral movement

Key Concept

Security Impact Assessment of Rollback and Backout Plans in Change Control
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Topics

Change Management and Security Impacts

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