How To Prevent BREACH Attack in ASP.NET MVC 5 Apps?

BREACH attack -

1. Disabling HTTP compression

2. Separating secrets from user input

3. Randomizing secrets per request

4. Masking secrets (effectively randomizing by XORing with a random secret per request)

5. Protecting vulnerable pages with CSRF

6. Length hiding (by adding random number of bytes to the responses)

7. Rate-limiting the requests

This is reported by this tool - https://acunetix.com/

How To Prevent BREACH attacks in ASP.NET MVC 5 Apps? How do we implement them?

The Points will need to be Implements to Prevent the BREACH Attacks -

1. Implement the CSRF attacks on every form.

2. Encrypt all sensitive information within the response body.

3. Disabling HTTP compression in IIS and the BREACH ATTACH issue was no longer raise by our security scans by acunetix.com

How To Disabling HTTP compression?

Disabling HTTP Compression - Windows 8 or Windows 8.1

The Steps Are -

1. Go to Start => Control Panel

2. Control Panel => Programs and Features and click on Turn Windows features on or off

3. Expand Internet Information Services

4. Expand World Wide Web Services

5. Expand Performance Features

6. Select Dynamic Content Compression and Static Content Compression

7. Ok

8. Close

Disabling HTTP compression - Windows Server 2012 or Windows Server 2012 R2

The Steps Are -

1. GO to Server Manager

2. Click the Manage menu

3. Click Add Roles and Features

4. Add Roles and Features wizard

5. Click to Next button

6. Select the installation type

7. Click to Next button

8. Select the destination server

9. Click to Next button

10. Server Roles

11. Expand Web Server (IIS)

12. Expand Web Server

13. Expand Performance

14. Select Static Content Compression and Dynamic Content Compression

15. Click to Next button

16. Select features

17. Click Next button

18. Confirm installation selections

19. Click to Install

20. Close

How To Enable or Disable Static and Dynamic Compression for a site or application?

The steps to enable or disable static and dynamic compression for a site -

1. Open Internet Information Services (IIS) Manager

2. Go to IIS application directory and select the site for enable or disable compression

3. Go to Home

4. Go to Compression and double click

5. Check the check-boxes to enable static and dynamic compression or remove the compression.

6. Once you have completed the above steps, click Apply in the actions pane.

References -

https://docs.microsoft.com/en-us/iis/configuration/system.webServer/httpCompression/

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By Anil Singh | Rating of this article (*****)

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