Exposing this specific version can lead an attacker to test for the following critical flaws:
XSS vulnerabilities can occur in web applications built on top of ASP.NET, allowing attackers to inject malicious scripts into content from otherwise trusted websites.
One of the primary concerns with ASP.NET, including version 4.0.3, is the potential for information disclosure. The detailed error messages and stack traces that can be displayed can provide attackers with valuable information about the system. x-aspnet-version 4.0.3 vulnerabilities
When an ASP.NET application handles a request (e.g., .aspx , .ashx , or MVC routes), the runtime automatically appends a response header similar to:
Regularly perform security audits and vulnerability assessments to identify and address potential weaknesses. Exposing this specific version can lead an attacker
protected void Application_PreSendRequestHeaders()
To mitigate these risks, consider the following steps: When an ASP
Response.Headers.Remove("X-AspNet-Version");