hunt-aspnet

To test ASP.NET ViewState deserialization vulnerabilities, you POST crafted __VIEWSTATE payloads to the target and interpret the validation errors to distinguish signed versus encrypted ViewState and map machineKey dependencies.

Common ASP.NET misconfiguration vectors include exposed trace.axd and elmah.axd endpoints, enumerable .svc, .asmx, and .axd endpoints, and vulnerable WCF services across classic Webforms and SharePoint deployments.

ViewState MAC validation impacts deserialization risk by requiring a valid machineKey to accept payloads; testing involves sending crafted __VIEWSTATE POSTs and interpreting errors to determine if MAC signing or encryption is enforced.

Yes, you can use this workflow for SharePoint and WCF endpoint security testing by enumerating .svc and .asmx endpoints, probing SafeControl whitelists, and validating deserialization vectors across enterprise IIS web applications.

The best way to fingerprint ASP.NET versions during a security assessment is by analyzing error banners and HTTP headers returned by the target IIS server to identify the framework version and potential attack surface.

Trace.axd and elmah.axd endpoints are a security risk because they can expose application tracing and error handling data, allowing testers to enumerate surface points and chain potential exploit paths during red-team assessments.