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Sam
Sam

Reputation: 2792

Prevent "clickjacking" aka "UI redress attack" through AWS security web services

It is possible to prevent Clickjacking or "UI redress attack" through any of AWS security services like WAF or CloudFront?

https://www.owasp.org/index.php/Clickjacking

It is known that certain security HTTP headers can be added to user requests that would instruct browsers to enforce certain security measures as follows,

These can be configured at the back end code level, however, I would like to know if one desire not to set these parameters at the application level, can this be done at the AWS level using any of their security gateway services like WAF or CloudFront?

Upvotes: 2

Views: 2147

Answers (2)

James G
James G

Reputation: 2914

EDIT: This has a similar answer here:

For those that come along now, you can use Lambda@Edge to add HSTS headers as well as other "frame-buster" headers like x-frame-options and referrer-policy.

This is quite cheap, working out to about 30 cents per million requests.

This link from the AWS networking and content delivery blog describes how to do this in detail.

It is too long to repeat the entire contents here but essentially it describes the following process flow:

Here is how the process works:

  1. Viewer navigates to website.
  2. Before CloudFront serves content from the cache it will trigger any Lambda function associated with the Viewer Request trigger for that behavior.
  3. CloudFront serves content from the cache if available, otherwise it goes to step 4.
  4. Only after CloudFront cache ‘Miss’, Origin Request trigger is fired for that behavior.
  5. S3 Origin returns content.
  6. After content is returned from S3 but before being cached in CloudFront, Origin Response trigger is fired.
  7. After content is cached in CloudFront, Viewer Response trigger is fired and is the final step before viewer receives content.
  8. Viewer receives content.

Once again, in case the blog linked to disappears, the below code is a sample to add security headers via Lambda (remembering this is to be run by CloudFront using Lambda@Edge integration):

'use strict';
exports.handler = (event, context, callback) => {
    
    //Get contents of response
    const response = event.Records[0].cf.response;
    const headers = response.headers;

//Set new headers 
 headers['strict-transport-security'] = [{key: 'Strict-Transport-Security', value: 'max-age=63072000; includeSubdomains; preload'}]; 
 headers['content-security-policy'] = [{key: 'Content-Security-Policy', value: "default-src 'none'; img-src 'self'; script-src 'self'; style-src 'self'; object-src 'none'"}]; 
 headers['x-content-type-options'] = [{key: 'X-Content-Type-Options', value: 'nosniff'}]; 
 headers['x-frame-options'] = [{key: 'X-Frame-Options', value: 'DENY'}]; 
 headers['x-xss-protection'] = [{key: 'X-XSS-Protection', value: '1; mode=block'}]; 
 headers['referrer-policy'] = [{key: 'Referrer-Policy', value: 'same-origin'}]; 
    
    //Return modified response
    callback(null, response);
};

Upvotes: 1

James Dean
James Dean

Reputation: 4451

You can take some actions at the Server level by adding headers in response mentioned in below link:

Upvotes: 1

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