Aug 25
GRC

GRC's Access Risk Analysis is a tool within Access Controls to enable you to define user access risk (via way of a rule set); execute risk analysis to identify access risk (or simulate for potential risk); and then provide you with system functionality to remediate the risk or mitigate via assignment of a control. As this is an approach, it can apply to any version of GRC (of course the system screen shots are in 10.x version).

Like any other risk process the reviewer is has four options: accept; transfer; mitigate or remediate. This document details our strategy and approach to risk remediation. Our position is that you should always attempt to remediate a risk before your mitigate. Remediation removes the risk (or the residual level is acceptable) from the system and does not rely on the use of compensating control (typically manual control that requires a person to take regular action and can be subjected to human error). Accepting and transferring of risk are last resorts. Of-course the your decision would involve a cost-benefit analysis. It makes not sense to spend more on the control than the true cost of the risk (financial, reputation, legal and compliance, etc).

When a risk has been identified (violation, issue, etc.) someone has to take action to resolve it. Depending on your master data setup, GRC automatically displays the risk definition, including who is responsible (risk owner); the respective business process; as well as mitigation owners/monitors. This information is important to enable your to know who to contact to discuss the risk and receive advise (and some of this interaction will occur off system).


Risk Violation Count is Massive (Why?)


Be aware that the first time you run a risk analysis it is likely that the number of violations will be very high. Users may have access creep due to change in job function and retained old access. Roles may have been built with too much access. At the time, the business did not have adequate tools to identify these risks. Many organisations undergo a security redesign project once they have implemented GRC due to the number of inherent conflicts in their roles. In the end they find it easier to completely rebuild security (get it right and clean first time) than try to unpick the issues and clean the existing roles. In some cases, companies are aware of the issues but mistakenly believe implementing GRC will fix it: all GRC will do is give you the number of violations and will not help you if you do not go down the path of remediation and mitigation.


For example, in the screen shot below there are over 200,000 conflicts (more if we scrolled down). This number is large - huge - and probably daunting when it comes to fixing it. After all where would you start? Remember a risk violation is one rule in the risk definition being met. Therefore, if a risk has two functions and both functions have two actions you then have 4 rule violations. If a user happens to have all four actions they too have 4 violations. If there are 50 derived roles, you will see the violation count increase to 200 (4 x 200). In the screen shot below, on further analysis (not visible in this screen shot) the bulk of the issues are caused by derived roles. By cleaning the imparting roles the number of violations will reduce substantially (also, you cannot clean a derived role without using PFCG incorrectly or actually fixing the imparting role).

Risk_Analysis.png

Where to start for Remediation (Still overwhelmed by so many violations)?

Your security role design as well as access provisioning strategies will impact how you approach remediation. This diagram below assumed position-based security is used in your organisation. Depending on the authorisation concept and access management in your system, the number of circles will vary. For example, you may not user business roles or composite roles.

object sequence for remediation pbs.jpg

When approaching risk remediation, use the diagram below as a reference and work your way from the inside out.

    1. Single Roles: focus on remediating conflict in your imparting roles and other non-derived single roles. You will fix the derived roles when you distribute the change from the imparting (assuming you have followed SAP standard security rules and not added additional authorisations to your derived). Single role clean up will involved removal of transactions and other authorisations.
    2. Composite Roles: by this stage you expect that none of the single roles have inherent conflict. You cannot remediate risk in a composite role if the single role has conflict. Your choice to remediate at this point is to remove roles assigned to the composite (possible replace with a different version). Another option is to remove access from the single (it may not cause an inherent conflict in the single) if the access is not required and it is contributing to the violation.
    3. Business Roles: this assumes you have built business roles via GRC Business Role Management for provisioning. Same principal applies as composite.
    4. Positions: if you are using position based security then you can consider removing roles (single, derived, composite, etc) from the position.
    5. Users: finally you have removed all inherited risk. The only unmitigated risk violations against the user is due to the combination of access. At this stage you can then remove roles.

Note: Remediating inherent role conflict will take time. You will need to work with the business process owners (the business) to determine the appropriate solution. Once you identify the permissions to removal from a role you will then need to follow your companies change management process to schedule the change and arrange a transport to Production. As an interim measure, you may need to implement a mitigating control.

Who should I engage with? What should I say?


This will depend on your company's organisational model and approach to risk management. However, regardless of approach it is still a business decision. You will need to consider meeting with the business process owners, line managers, etc.


In starting the conversation with these stakeholders you need to outline and explain what the risk is and why it needs to be remediated. In some cases the conversation may be as simple as 'Is this access really required'. You may discover over time that access creep has cause the conflict and requires clean-up. Where a user is concerned, the question may be 'Does this user really need both access'. The stakeholders identify non-compliance in a job duties or that there is an alternative person to take on part of the function. Again, it will all depend on the business so get out there and talk to the stakeholders!

For some more ideas refer to Reviewing of Risks in the: Risk Lifecycle


How can I decide remediation approach?


The diagram below has been devised to visually represent the process to deciding how to remediate the access. You may devise a similar approach and change the sequence of options depending on your organisation's policy.

decision flow.jpg

Is it a Risk?: Before investing work effort into remediation you need to verify that violation is actually a risk and not a false positive.You may have executed the report at Action level only but if you re-ran at permission the violation is not longer there. Alternatively, you may look at the violation and question why it is a risk in the first place. If you realise the risk definition is incorrect then you need to change it. The rule-set is not static and must be reviewed regularly.

Does the object need both functions?

The violation is a risk and you need to take action. Does the object (role, position, etc) require both actions? To assist in this decision you could look at action usage reports in GRC. If it appears one of the functions is not used, then remove it. For roles this will be a change request and users/positions it will be an Access Request. Approval from the business will be required regardless.


Is there Alternative Access?

You determined the both functions were used but could you assign a different transaction or authorisation combination to restrict. For example, the user might have XK01/02 transactions for Vendors but does not need all views - such as payments details. Instead they only need FK01/02 which does not include the payment details.  By changing the transaction over the user can still perform their job function via a different transaction.

Is there a System Control - Can system controls via IMG configuration, workflow and ABAP development be implemented to remove the risk? Alternatively, can the business process be changed to include a new step. For example, add vendor confirmation via FK08/FL09 for sensitive fields to force a second pair of eyes to review the change.


Unable to Remediate -  By this stage you have exhausted all possibilities to remediate the access and must investigate mitigation as an option.As already mentioned many times on SCN, always try to find a way to remediate a risk instead of defining compensating controls. Mitigation, whether it be with the help of spot checks, reviewing postings, etc. is always a reactive way and fraudulent actions might be done in the mean time. Still there needs to be a balance between managing risk and allowing the business to function. If you cannot remediate, refer to the document for further details on defining mitigating controls: Defining Mitigating Controls / Compensating Controls



Analyse Again (or verify your Remediation via Simulation)


Once you have remediated your risk we recommend you re-execute your risks analysis. You need to ensure that by remediating the list violations you did not introduce a new one. The good news with GRC is the ability to simulate access risk. Before going to the effort of role change or access change you can execute a risk simulation to test removing of the conflicting function and replacing with the alternative. This will provide you with confidence to remediate and avoid introduction of new risk. Using simulation will also reduce rework through continual rebuild or access change.


Finally I'm Finished - the system is clean...

Sorry to break it to you bust risk identification and analysis is continual. You must regularly plan to review your rule set to ensure the risks are valid (support packs, enhancement packs, custom development, changes to configuration, changes to the business, etc) as the system and business is in a constant state of change. In addition, when security role changes are migrated to production then user may now have risks.


Keep on top of the review so you only ever have a small number of violations to respond to. Scheduling Role Re-certification in BRM, SoD and UAR Review workflow will help manage this regular review.


Does your organisation approach remediation in GRC differently? We would love to hear your feedback in the comments below.


Best regards,

Alessandro Banzer & Colleen Lee

See the original version of the document: http://scn.sap.com/docs/DOC-57447

Posted by Alessandro Banzer

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