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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
---
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# AspNet header exposes version information
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## Description
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The target website returns AspNet headers and 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-AspNet-Version` header set `<httpRuntime enableVersionHeader="false" />` in the `<system.Web>`
section of the `Web.config` file.
## Details
| ID | Aggregated | CWE | Type | Risk |
|:---|:--------|:--------|:--------|:--------|
| 16.5 | true | 16 | Passive | Low |
## Links
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- [CWE ](https://cwe.mitre.org/data/definitions/16.html )
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- [IIS Remove Unwanted Headers ](https://techcommunity.microsoft.com/t5/iis-support-blog/remove-unwanted-http-response-headers/ba-p/369710 )
