Vb net validating input
It depends on what the application does with the uploaded file and especially where it is stored. Following security controls should be implemented for File Upload functionality: If you use the Parameters collection, SQL treats the input is as a literal value rather then as executable code.The Parameters collection can be used to enforce type and length constraints on input data. If type-safe SQL parameters are not used, attackers might be able to execute injection attacks that are embedded in the unfiltered input.Using a file upload helps the attacker accomplish the first step.The consequences of unrestricted file upload can vary, including complete system takeover, an overloaded file system or database, forwarding attacks to back-end systems, and simple defacement.The first step in many attacks is to get some code to the system to be attacked.Then the attack only needs to find a way to get the code executed.Prohibit Dtd = true; Xml Reader reader = Xml Reader. NET 4 Xml Reader Settings settings = new Xml Reader Settings(); settings. To disable entity resolution for Xml Documents, use the If disabling entity resolution is not possible for your application, set the Xml Reader Settings.Max Characters From Entities property to a reasonable value according to your application's needs.
If entity resolution is not required by your application, then disable it.This header is designed to mitigate MIME-Sniffing attacks.Support for this header was added in Internet Explorer 8 (IE8)Only users of Internet Explorer 8 (IE8) will benefit from X-Content-Type-Options. This allows custom functions to be used in an XSLT transformation.The script is executed under the context of the process performing the transform.