Add external services from SAP CRM to the proposal values
Analyzing the quality of the authorization concept - Part 1
The passwords of the users are stored in the SAP system as hash values. The quality of the hash values and thus their safety, however, depends on the hash algorithms used. The hash algorithms previously used in SAP systems are no longer considered safe; They can be cracked in a short time using simple technical means. You should therefore protect the passwords in your system in various ways. First, you should severely limit access to the tables where the hash values of the passwords are stored. This applies to the USR02 and USH02 tables and in more recent releases the USRPWDHISTORY table. The best way to assign a separate table permission group to these tables is to do so, as described in Tip 55, "Maintain table permission groups". In addition, you should also control the accesses using the S_TABU_NAM authorization object.
The system checks direct access to the contents of tables, for example, with transactions SE16, SM30, or SE16N with authorization checks on a table authorization group, object S_TABU_DIS. If there are no suitable authorizations for the table authorization group, the system checks the name of the table or view, object S_TABU_NAM. When making changes to client-independent tables, the system also checks the authorizations for object S_TABU_CLI. If you have configured line-based authorization checks in Customizing, the system also checks authorization object S_TABU_LIN. Assign tables or views to a table authorization group using transaction SE11 or SE54. You can also define table authorization groups using transaction SE54. If your customer development implements direct access to a table, use the VIEW_AUTHORITY_CHECK function module to perform the authorization check. For more information about generic access to tables, see SAP Note 1434284 Information Published on SAP Site and the online documentation for the authorization objects mentioned above.
User and authorization management
An essential aspect in the risk assessment of a development system is the type of data available there. Normally, at least a 3-system landscape is used (development, test and production system). One of the purposes of this is to ensure that (possibly external) developers do not have access to productive or production-related data. Since developers with the required developer authorizations have access to all data in all clients of the system concerned, there should be no production-related data in a development system. Even a division into a development and a test client (with the sensitive data) within the system does not protect against unauthorized data access for the reasons mentioned above. In the following, it is assumed that no production-related data exists on the development system. Otherwise, extended authorization checks must be carried out in the modules and access to production-related data must be approved beforehand with respect to the production system by the respective data owners. Since developers, as described, have quasi full authorization through their developer rights, revoking the authorizations listed below can raise the inhibition threshold for performing unauthorized activities, but ultimately cannot prevent them.
You know that changing your SU24 data involves mixing the roles in question. Previously, the permission administrators had to select roles from, for example, the SUIM transaction to edit them. Often, the remixing of the respective roles is also forgotten. In order to ensure that you can set the mixing mode for the respective roles directly when maintaining the data in the transaction SU24, the function has been provided here with the respective support packages named in SAP Note 1896191. Correction is used to change the mixing mode for PFCG: On/Off/Roles. The function assigns the shuffle mode to the roles, which corresponds to step 2c of the transaction SU25 (see tip 43, "Customise Permissions After an Upgrade"). You can enable this function by using the value Y for the parameter SU2X_SET_FORCE_MIX in the table PRGN_CUST. The status of the mixing mode can be checked by clicking the button Mixing mode for PFCG: Enquire On/Off. By default, this feature is off. The Roles button (Use in Single Roles) identifies all the roles that the selected application contains and displays them directly in the SU24 transaction. You will receive a list of all matching roles in the SUPC transaction by selecting the Also-to-be-matched roles option, and you can now gradually update the roles.
During go-live, the assignment of necessary authorizations is particularly time-critical. The "Shortcut for SAP systems" application provides functions for this purpose, so that the go-live does not get bogged down because of missing authorizations.
Upgrades also require that the eligibility roles be revised.
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The use of suggestion values not only brings advantages when creating or maintaining PFCG roles, but also when maintaining permissions as a rework of an upgrade.