Remediation Issues
Legacy systems
Compensating controls: filtering devices installed in front of it.
Air-gap
Just take it out and replace it
Proprietary Systems
Custom software (developed in house or purchased)
Developer out of business
Product no longer supported (abandonware)
Degrading functionality. We secured it, but does it still work?
Business process interruption. Reboots. Badly implemented high availability/fault tolerance. Plan your maintenance window.
Slow hardware.
Library version conflicts.
New patches, new bugs and crashes. Test your patches in a test environment.
Organizational Governance
The bureaucracy of making things happen
Always have approval
Who to thank, who to blame.
Change management
MOUs and SLAs – Memo of Understanding and Service Level Agreement
MOU
Not legally binding
Sets some roles, expectations, timelines
Gentleman’s agreement
Can be an email
SLA
Contract
Legally Binding
Describes deliverables
Describes how they are measured
Describes penalties
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