Explain patch management lifecycle and why timely patching matters for a TA.

• A. Inventory, assess, test, deploy, verify; timely patches reduce attack windows and preserve trust by maintaining up-to-date attestations.
• B. Patch management involves only yearly reviews.
• C. Patches should be deployed without testing to save time.
• D. Patches are optional if systems are well configured.

Answer: (A)

Patching everything promptly is essential to keep systems secure and maintain trust in the agent’s attestations. A practical patch management lifecycle covers five connected steps: first, inventory, so you know what software and versions are running across the environment; next, assess, where you determine which vulnerabilities apply and how severe they are and how exposed the assets are. Then test, in a controlled environment, to ensure the patch won’t disrupt critical functions or introduce compatibility issues. After that comes deployment, moving the patch into production in a managed way, and finally verify, where you confirm the patch is applied successfully and that the system operates as expected and the attestation reflects the updated state.

Timely patching matters for a TA because it directly affects the freshness and reliability of attestations. When patches are applied quickly, the attack surface shrinks and the system’s current state is more accurately reflected in attestations, helping to preserve trust in the agent’s evidence of integrity. Delays leave known weaknesses open longer, increasing the risk of compromise and potentially invalidating attestations if the system no longer matches the expected secure posture. Testing is important too; skipping it can cause downtime or subtle failures that undermine trust in the system’s integrity reports. Deploying patches without testing or treating patches as optional undermines overall security and the credibility of the TA’s attestations.