2022-02-04 16:28:24 +00:00

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include::../description.adoc[]
include::../ask-yourself.adoc[]
include::../recommended.adoc[]
== Sensitive Code Example
In Express.js application the code is sensitive if the https://www.npmjs.com/package/helmet-csp[helmet-csp] or https://www.npmjs.com/package/helmet[helmet] middleware is used without the ``++frameAncestors++`` directive (or if ``++frameAncestors++`` is set to ``++'none'++``):
----
const express = require('express');
const helmet = require('helmet');
let app = express();
app.use(
helmet.contentSecurityPolicy({
directives: {
// other directives
frameAncestors: ["'none'"] // Sensitive: frameAncestors is set to none
}
})
);
----
== Compliant Solution
In Express.js application a standard way to implement CSP frame-ancestors directive is the https://www.npmjs.com/package/helmet-csp[helmet-csp] or https://www.npmjs.com/package/helmet[helmet] middleware:
[source,javascript]
----
const express = require('express');
const helmet = require('helmet');
let app = express();
app.use(
helmet.contentSecurityPolicy({
directives: {
// other directives
frameAncestors: ["'example.com'"] // Compliant
}
})
);
----
include::../see.adoc[]
ifdef::env-github,rspecator-view[]
'''
== Implementation Specification
(visible only on this page)
include::../message.adoc[]
endif::env-github,rspecator-view[]