This blog, written by Michael Felt, discusses AIX security topics. Articles on IBM AIX security including PowerSC, AIX RBAC, AIX shell scripting, passwords and user security. RBAC or Role Based Access Control has been available in AIX since starting with AIX Prior to that, access control is AIX was the same as for any .

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Legacy RBAC also provides a framework for extending the pre-defined roles but it is quite difficult to use. Also, the owner can modify object accessibility at any time i. AIX family Software version: Different root user tasks aixx are assigned different authorizations.

How-to Integrate Applications Into AIX RBAC

DAC does not allow this. To summarize, authorizations can be assigned to an executable command. Should a user with information system security officer ISSO or a similar role be able to execute shutdown?

Yes, it is possible if the process has the required privilege to execute the command. Anyone who gets control of the administrative user maliciously cannot do anything, since the administrator alone cannot do anything rrbac.

System shutdown reboot File system backup, restore, and quotas System error logging, trace, and statistics Workload administration. The root user decides who can log in, who can access the data, which process has the privileges to get into the kernel mode, and so on.

The system has a pre-defined authorization to certain commands and roles for system-defined users.


IBM Creating a RBAC role to run a command in AIX – United States

AIX Cryptographic Services improves security while simplifying administration. There are five 5 components to the RBAC security database:. Non-root users will be additionally be blocked by the attributes login, rlogin,su and sugroups. However, DAC does not allow the file to be executed by any non-root user. Written by Michael Felt. This article shows how RBAC provides enhanced security to the system. There are five 5 components to the RBAC security database: The owner has the privlidge discretion or right to determine who has access to an object i.

Contact the author for any further clarification on this topic. Hence, a user who does not have the required authorization will fail to execute bootinfo. You have the option of disabling the root access to the system and performing all tasks through one or more user accounts.

Since this user, httpd, owns all the files all normal access rights read, write, execute should be available where appropriate. Successfully updated the Kernel Object Domain Table. Some of the ISSO tasks or responsibilities are:. Some of the ISSO tasks or responsibilities are: System shutdown and reboot File system backup, restore and quotas System error logging, trace and statistics Workload administration. Priviledges are assigned to users.

Prior to AIX version 6, portions of root-user authority could be assigned to non-root users. Note that this account is not in the group httpd. Successfully updated the Kernel Device Table. Further, following this example shows how creating the user and setting the password for the user is not a single-user responsibility.


Every object is owned by a single user, with additional access controlled via group membership group permissionsor anyone else others, i. X We use cookies to optimize your visit to our website. The basic question is: Yes, access control DAC, or discretionary access controlbut no role based management of lists of authorizations or priviledges to execute sets of commands. Is it possible that a malicious user can get the role of ISSO and use his own shutdown program to attack the system?

Successfully updated the Kernel Command Table. The following table shows the command details in the order of how authorization and roles can be used. If this contains too many authorizations we can create a new role for just the specific authorization we wish to give.

The answer is No provided if the isso role is not assigned intentionally. This can pose a major security threat.

First determine which command the user wants to run. This means that the user needs an authorization and privileges to execute bootinfo. The root user succeeds any access control and performs any operation that it wants to do.

Start with the user we just created. Authorizations get assigned to one or more roles; roles get assigned to users.