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User authentication is usually performed by entering a user name and password. This information is called user credentials and should only be known to the user, so that no third party can gain access to the system under a false identity. This post explains how a user's password protection can be circumvented and how to prevent it. SAP system legacy data The login data of a user, including password, are saved in the USR02 database table. However, the password is not in plain text, but encrypted as a hash value. For each user there are not only one but up to three generated password hashes. Different algorithms are used to calculate these values, but only the Salted SHA1 can be considered sufficiently safe. Table deduction USR02 The secure password hash is located in the fifth column of the pictured table deduction with the heading Password hash value. The corresponding data field in the column is called PWDSALTEDHASH. Weak Password Hash Risks You have a good and working permission concept that ensures that no processes or data can be manipulated or stolen. A potential attacker now has the ability to read out your database with the password hashes. The hash values are calculated using password crackers, which are available on the Internet at home, and the attacker now has a long list of user credentials. To damage your system, the user will now search for the appropriate permissions and perform the attack under a false identity. Identifying the actual attacker is virtually impossible. Check if your system is vulnerable too Your system generates the weak hash values if the login/password_downwards_compatibility profile parameter has an unequal value of 0.
Job scheduling: your system needs to run various automated background jobs that consume resources. Your administrator must carefully schedule these tasks when user demand is low so they don't impact performance.
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Especially in larger companies, which also have multiple locations in different countries, it is often necessary to grant different employees the same permissions for different levels of organisation, such as accounting circles. In order to make maintenance and maintenance of the system easy in such a situation, it is useful to set the inheritance principle for SAP permissions. How does SAP Permissions Inheritance work? An inheritance is always about a master object passing certain properties to a derived (sub) object. Therefore, these properties do not need to be maintained several times. Also, changes to the master object are passed directly to the derived objects. This allows easier maintenance and drastically minimises the error rate. In the case of SAP Permission Inheritance, the required permissions are bundled in a Upper or Master role. Only the organisational levels have to be maintained in the roles derived from them. The permissions are automatically pulled from the master role. Create Inheritance for SAP Permissions The following shows how to create and use inheritances for SAP permissions. This requires only two steps: Creating a master role and defining derived roles. Step 1: Create a master role Inheritance always requires a parent role, because all properties are inherited from it. If this role, in which all shared permissions are bundled, is missing, the first step is to create this master role. To do this, open the PFCG transaction and enter the desired name of the master role in the Name field. It is possible to identify master and derived roles by using naming conventions. The "Single Role" button will then be used to create the desired role. In the following example I create the master role "findepartment_r".
With all these tasks we can support you to compensate e.g. bottlenecks or failures as well as fast growth in your teams. We have resources that have been active in this environment for many years and have gained extensive experience. We are happy to assist you with these challenges.
"Shortcut for SAP Systems" makes many tasks in the area of the SAP basis much easier.
Because hybrid landscapes are seen as the operating model of the future, it is necessary to develop monitoring strategies for this.
On www.sap-corner.de you will also find useful information about SAP basis.
In order to drive innovation in the company, it is necessary to establish a team or a few experts whose recognised role is to promote research projects and PoCs, to continuously train themselves in this regard, to develop innovation proposals and to bring them into the committees.