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| ID | About: | Link: |
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| 1 | However, beside records as representation of stored data, users can interact with other data representation, which are not affected by the mandatory access policy. Tables are an example of such objects. Users indeed can modify structure of tables, i.e. add new fields, change their names, and modify data types. OLS loses its ability to work properly on table level. | Adobe premier software free |
| 2 | For instance, a user with higher mandatory rights has a right to create a new field in a table. The name of the field may be confidential itself, and OLS mechanism does not prevent this operation. A user with lower access rights has always a possibility to query names of all the fields. | Dog patch viet nam |
| 3 | For example, a new field is created with the name new_password_xxx (where xxx is a top secret information) with the following sql-query: | Limewire acceleration patch carck |
| 4 | ALTER TABLE user1.test_table ADD (new_password VARCHAR2(30)); | Open source software to download |
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If another user who does not have any mandatory rights executes the following query (SELECT * FROM user1.test_table; ), he gets an empty data set, however all field names ofuser1.test_table are exposed to him. As it was shown above, column name can contain classified information.
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Operations shown in the example create duplex channels of data exchange between subjects with higher and lower access rights, and therefore they can cause leakage of classified information.
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In the issue of the foresaid, the mandatory access model implemented in Oracle is not complete, and this fact makes it possible to exchange classified information without any control of the mandatory access system, which decreases information value.