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An attacker gains access to a Web server's database and displays the contents of the table that holds all of the names, passwords, and other user information. The attacker did this by entering information into the Web site's user login page that the software's designers did not expect to be entered. This is an example of what kind of software design problem/issue?

Insufficient firewall rules

Insufficient anti-virus detection

Insufficient exception handling

Insufficient input validation

Explanation

Circumventing Authentication

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