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diff --git a/doc/user/application_security/dast/checks/693.1.md b/doc/user/application_security/dast/checks/693.1.md new file mode 100644 index 00000000000..07cb368b39a --- /dev/null +++ b/doc/user/application_security/dast/checks/693.1.md @@ -0,0 +1,36 @@ +--- +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 X-Content-Type-Options: nosniff + +## Description + +The `X-Content-Type-Options` header with the value `nosniff` ensures that user agents do not attempt to +guess the format of the data being received. User Agents such as browsers, commonly attempt to guess +what the resource type being requested is, through a process called MIME type sniffing. + +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 could be interpreted as HTML and execute Cross-Site Scripting (XSS) attacks. + +## Remediation + +We recommend that the header and value of `X-Content-Type-Options: nosniff` be set server wide. +This ensures any resources that are mistakenly missing a `Content-Type` value are not +misinterpreted. + +## Details + +| ID | Aggregated | CWE | Type | Risk | +|:---|:--------|:--------|:--------|:--------| +| 693.1 | true | 693 | Passive | Low | + +## Links + +- [owasp](https://owasp.org/www-project-secure-headers/#x-content-type-options) +- [cwe](https://cwe.mitre.org/data/definitions/693.html) +- [Mozilla Blog on MIME Confusion attacks](https://blog.mozilla.org/security/2016/08/26/mitigating-mime-confusion-attacks-in-firefox/) +- [Mozilla MDN on X-Content-Type-Options](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options) |