![]() The name "O'Reilly" would likely pass the validation step since it is a common last name in the English language. Consider a SQL injection scenario in which a person's last name is inserted into a query. For example, some weaknesses might involve inadvertently giving control to an attacker over an input when they should not be able to provide an input at all, but sometimes this is referred to as input validation.įinally, it is important to emphasize that the distinctions between input validation and output escaping are often blurred, and developers must be careful to understand the difference, including how input validation is not always sufficient to prevent vulnerabilities, especially when less stringent data types must be supported, such as free-form text. ![]() Caution must be used when referencing this CWE entry or mapping to it. Note that "input validation" has very different meanings to different people, or within different classification schemes. Errors in deriving properties may be considered a contributing factor to improper input validation. Implied or derived properties of data must often be calculated or inferred by the code itself. a cryptographic signature to prove the source of the data
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