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ServiceNow - Access Control Lists

ServiceNow - Access Control Lists

Security Rules defined and set at the Row Level (access to the record) and at the Column Level (access to the field) and is executed when attempting to access any ServiceNow table to perform CRUD (create, read, update and delete)  operations. Admins are except from the Access Controls when the Admin overrides checkbox is checked.

Note: By default, the system provides ACL rules to restrict access to all database and configuration operations.
ACL rules can be defined in three ways:
  1. Conditional Expressions
  2. Scripts
  3. Roles
After finding a matching ACL rule, the system evaluates if the user has the permissions required to access the object and operation. If a user meets the ACL rule permissions, the instance grants the user access to the listed operation on the object. If a user does not meet the ACL rule permissions of the first matching rule, the system evaluates the next matching ACL rule. If the user fails to meet the ACL rule permissions of any matching ACL rule, the system denies the user access to the operation on the object.