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diff --git a/doc/user/application_security/dast/checks/16.1.md b/doc/user/application_security/dast/checks/16.1.md new file mode 100644 index 00000000000..bb030d2f9c4 --- /dev/null +++ b/doc/user/application_security/dast/checks/16.1.md @@ -0,0 +1,33 @@ +--- +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 +--- + +# Missing Content-Type header + +## Description + +The `Content-Type` header ensures that user agents correctly interpret the data being received. Without this header +being sent, the browser may misinterpret the data, leading to MIME confusion attacks. If an attacker were able +to upload files that are accessible by using a browser, they could upload files that may be interpreted as +HTML and so execute Cross-Site Scripting (XSS) attacks. + +## Remediation + +Ensure all resources return a proper `Content-Type` header that matches their format. As an example, +when returning JavaScript files, the response header should be: `Content-Type: application/javascript` + +For added protection, we recommend that all resources return the `X-Content-Type-Options: nosniff` +header to disable user agents from mis-interpreting resources. + +## Details + +| ID | Aggregated | CWE | Type | Risk | +|:---|:--------|:--------|:--------|:--------| +| 16.1 | true | 16 | Passive | Low | + +## Links + +- [cwe](https://cwe.mitre.org/data/definitions/16.html) +- [Mozilla Blog on MIME Confusion attacks](https://blog.mozilla.org/security/2016/08/26/mitigating-mime-confusion-attacks-in-firefox/) |