45 lines
1.8 KiB
Markdown
45 lines
1.8 KiB
Markdown
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---
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stage: Secure
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group: Dynamic Analysis
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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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---
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# Server header exposes version information
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## Description
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The target website returns the `Server` header 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
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vulnerabilities, or catalog known sites running particular versions to exploit in the future when a
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vulnerability is identified in the particular version.
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## Remediation
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We recommend that the version information be removed from the `Server` header.
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Apache:
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For Apache based web sites, set the `ServerTokens` to `Prod` in the `httpd.conf` configuration file.
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NGINX:
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For NGINX based websites, set the `server_tokens` configuration value to `off` in the `nginx.conf` file.
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IIS:
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For IIS based websites version 10 and above you can use the `removeServerHeader` element to the `requestFiltering`
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section of the `Web.config` file.
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For all other server types, please consult your product's documentation on how to redact the version information from
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the `Server` header.
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## Details
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| ID | Aggregated | CWE | Type | Risk |
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|:---|:--------|:--------|:--------|:--------|
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| 16.2 | true | 16 | Passive | Low |
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## Links
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- [cwe](https://cwe.mitre.org/data/definitions/16.html)
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- [Apache ServerTokens](https://blog.mozilla.org/security/2016/08/26/mitigating-mime-confusion-attacks-in-firefox/)
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- [NGINX server_tokens](https://nginx.org/en/docs/http/ngx_http_core_module.html#server_tokens)
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- [IIS 10 Remove Server Header](https://docs.microsoft.com/en-us/iis/configuration/system.webserver/security/requestfiltering/#attributes)
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