Consistency and Compliance

Consistency and Compliance

While the audit and assessment element of your patch management program will help identify systems that are out of compliance with your organisational guidelines, additional work is required to reduce non-compliance. Your audit and assessment efforts can be considered ‘after the fact’ evaluation of compliance, since the systems being evaluated will typically be already deployed into production. To supplement post-implementation assessment, controls should be in place to ensure that newly deployed and rebuilt systems are up to spec with regard to patch levels.

patch Consistency and Compliance

System build tools and guidelines are the primary enforcement means of ensuring compliance with patch requirements at installation time. As new patches are approved and deployed, build images and scripts should be updated so that all newly built systems are appropriately patched, and associated build documentation should be updated to reflect these changes. In addition to updates to build tools and documentation, operational procedures must exist to facilitate ongoing compliance of newly built systems. If an engineering team typically builds servers (e.g. with the base operating system and applications) and a separate operations team then assumes management of the system, a process must exist to funnel operational changes back to the build and engineering stage of the system lifecycle. These modifications are most ideally and suitably handled via an enterprise-wide change management system. Any new patches and updates that are approved and installed by operations should also be integrated by the engineering team into new builds, with the change management system providing both an appropriate audit trail and suitable procedural guidelines for this implementation.


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