Angular applications are very popular now, but its security problems are particularly prominent. Because developers not only have to secure the application, but also the connection to the server. This article will show you how to secure your Angular application and how to avoid potential vulnerabilities in your application.
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Angular Security Overview
A key feature of Angular is its security, Angular uses several security features to protect the application from attacks. For example, Angular prevents cross-site scripting (XSS) attacks using Content Security Policy (CSP), a security policy that helps detect and prevent XSS attacks by allowing content sources to be loaded into web pages.
Another security feature of Angular is its sandbox, which is a security mechanism that isolates untrusted code from the rest of the application. This isolation helps prevent malicious code from accessing sensitive data or destroy the application.
Overall, Angular is a very secure framework for building web applications, however like any powerful tool, there are risks of security holes if used incorrectly. Angular applications can face security issues if they are not properly secured.
What are the different types of attacks your Angular application might suffer from?
There are several different types of attacks that your AngularJS application can suffer from, including:
Cross-site scripting (XSS) attack
This type of attack injects malicious code into your application that can be executed by an unsuspecting user.
Cross-site request forgery (CSRF) attack
This attack tricks a user into submitting an illegal request to your app, such as transferring money or changing a password.
SQL injection attack
This attack occurs when malicious input is entered into a form field, which can then be used to execute SQL code on the backend database. This can allow an attacker to access sensitive data, modify or delete it.
Ways to secure Angular applications
To protect your app from these and other types of attacks, it's important to use a secure development process and keep dependencies up to date. Here are some best practices to keep in mind.
Sanitize with XSS
One way cybercriminals attack businesses is through XSS attacks, which is when they insert malicious scripts into DOM elements on your website to steal user data or perform other harmful actions. To prevent this, you must sanitize any untrusted input in several places throughout your website or web application, doing so can make it more difficult for attackers to insert malicious code and help keep your users' data safe.
Here are a few places you should clean up:
- HTML (internal binding HTML)
- style (CSS)
- property (bind value)
- resources (reference files)
Always ensure that any untrusted value provided by an external user is converted to a trusted value before using it, you can bind the safe value to an internal HTML attribute and pass the HTML string to the DomSanitizer service method, this will help To ensure that only trusted values are used in the application.
import { Component, OnInit } from '@angular/core';
import { MyService } from './data.service';
import { DomSanitizer, SafeHtml } from '@angular/platform-browser';
@Component({
selector: 'app-root',
template: `<div [innerHtml] = "safeValue"></div>`,
providers: [MyService]
})
export class AppComponent implements OnInit {
safeValue: SafeHtml;
constructor(private secure: MyService) {
this.safeValue = this.secure.getSafeHtml("<h1>Sanitization Success</h1>");
}
ngOnInit() {
}
}Binding using the InnerHtml property
If you must dynamically add HTML to a component, bind its generation to [innerHTML], this ensures the data will be interpreted as HTML in its context and is sanitized, removing all unsafe markup and preventing it from executing Any malicious cross-site scripting code.
<div [innerHtml] = "safeValue"></div>Avoid template engines that use server-side templates
In Angular, we need to avoid using template engines on server-side templates for several reasons:
- Templating engines tend to be large and complex, and they can impose a huge overhead on our application.
- They reduce the portability of our code, since templates may need to be rewritten if we switch to a different templating engine.
- They can make the code difficult to maintain as we may need to keep track of multiple template engines and their respective configuration options.
Avoid Dangerous Angular API Endpoints
There are many potential dangers when using Angular API endpoints, endpoints may be overloaded, unavailable, or simply incorrect, which may cause the application to break or misbehave.
To avoid these dangers, it is important to understand the Angular API and how it works. Once you have a good understanding of the API, you can start making calls to specific endpoints. If one endpoint is giving you trouble, switch to another endpoint. Always test your application thoroughly before deploying it to production.
Don't add custom to core library
One of the amazing aspects of the Angular platform is that users expect customization in the software world, however, customization in the Angular core library is generally not a good idea.
By customizing the core library, you're tied to a specific Angular version - once you've customized the library, there's no easy way to apply a patch or update to the latest version without compromising your app's functionality.
Using a professional component library like Kendo UI in Angular allows you to develop an application that fits with your company's branding style and continues to grow with each new version of Angular.
Other Important Points to Remember for Angular Security
- Always update Angular version.
- Use strong authentication mechanisms.
- Keep dependencies up to date.
- Use a security-conscious framework.
- Use safe coding practices.
- Encrypt communication between application and server using SSL.
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