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---
stage: Secure
group: Dynamic Analysis
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
---
# AspNetMvc header exposes version information
## Description
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The target website returns AspNet headers along with version information of this website. By
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exposing these values attackers may attempt to identify if the target software is vulnerable to known
vulnerabilities. Or catalog known sites running particular versions to exploit in the future when a
vulnerability is identified in the particular version.
## Remediation
To remove the `X-AspNetMvc-Version` information set `MvcHandler.DisableMvcResponseHeader = true;` in the
`Global.asax.cs` file in the `Application_Start()` method.
```cs
protected void Application_Start()
{
MvcHandler.DisableMvcResponseHeader = true;
}
```
## Details
| ID | Aggregated | CWE | Type | Risk |
|:---|:--------|:--------|:--------|:--------|
| 16.6 | true | 16 | Passive | Low |
## Links
- [CWE ](https://cwe.mitre.org/data/definitions/16.html )
- [IIS Remove Unwanted Headers ](https://techcommunity.microsoft.com/t5/iis-support-blog/remove-unwanted-http-response-headers/ba-p/369710 )
