Prevent excessive permissions on HR reporting
Use SAP Code Vulnerability Analyser
For these scenarios, there are several ways to determine which systems and clients to display to the user in the self-service selection. We therefore describe a possibility that you can use in all scenarios. To do this, use the BAPI BAPI_USER_GET_DETAIL, which you must call for the SAP User ID on all relevant systems. Check the entry for the RETURN table parameter first. If the entry is empty, the user is present in the SAPS system. Any error messages during the call are displayed in this parameter (e.g. if the user is not present). If the PROFILES or ACTIVITYGROUPS table parameters have entries, permissions in this system are assigned to the user. In addition, you can use the REF_USER export parameter to identify a reference user that is associated with it. However, you must also check that it has permissions. You can also determine if a lock exists when you call the BAPI BAPI_USER_GET_DETAIL. To do this, use the ISLOCKED export parameter, which returns a four-character combination of the L (locked) and U (not locked) characters.
Armed with this information, it goes to the conceptual work. Describe which employee groups, which organisational units use which applications and define the scope of use. In the description, indicate for which organisational access (organisational level, but also cost centres, organisational units, etc.) the organisational unit per application should be entitled; So what you're doing is mapping out the organisation. It is also important to note which mandatory functional separation must be taken into account. This gives you a fairly detailed description, which in principle already indicates business roles (in relation to the system).
Manual authorizations
If you do not encrypt communication between the client and the application servers, it is surprisingly easy for a third party to catch the username and password. Therefore, make sure you encrypt this interface! There is often uncertainty as to whether the password in SAP systems is encrypted by default and whether there is encryption during communication between the client and application servers by default. This ignorance can lead to fatal security vulnerabilities in your system landscape. We would therefore like to explain at this point how you can secure the passwords in your system and protect yourself against a pick-up of the passwords during transmission.
Your system landscape does not correspond to a typical three-system landscape? Find out what you should consider when upgrading the suggested values of roles. Your system landscape may differ from the typical three-system landscapes, for example, because you have several development systems or development mandates. Transports are then used to merge all developments and customising entries into one consolidation system. Perform your upgrade work in the SU25 transaction and use Step 3 to transport your SU24 data. By contrast, perform this step in all development systems, run all transports together in your consolidation system, and only the last import of the tables is used. The same entries are also recognised as deleted entries. The same is true with your PFCG rolls. Maintain these in multiple development systems or mandates, and if you now want to transport the rolls with their generated profiles, there is a risk that the profile numbers will be the same, as the profile names consist of the first and third characters of the system ID and a six-digit number. If the profiles originate from the same system (even if the client is a different one), import errors may occur due to the same profile names. In addition, the origin of the profile can no longer be traced afterwards. Therefore, you need a way to transport the data for the permission proposal values and the PFCG rolls in Y landscapes in a transparent and consistent way.
The possibility of assigning authorizations during the go-live can be additionally secured by using "Shortcut for SAP systems".
For release-dependent information on SNC client encryption, see SAP Note 1643878.
If you want to know more about SAP authorizations, visit the website www.sap-corner.de.
Therefore, only apply these permissions in a restricted way.