Starting Letter: W

Constantly improving your web applications allows you to unlock new business opportunities.

However, you must be aware of the risks of modernizing your web applications, as it may generate new security vulnerabilities that malicious actors are ready to exploit. Thus, when thinking about web application security, you must keep in mind:

1. Follow all the paths to strengthen the application security

2. Actionable strategies for mitigating security threats and risks

3. Plan to defend against business logic attacks

JavaScript is an interpreted language, meaning everybody can use a browser debugger to go through the JS code and read or modify it.

The accessibility of client-side JavaScript code through browser debugging tools does not inherently create vulnerabilities. However, it does introduce potential security risks, as attackers can exploit this access to identify and target weaknesses in unprotected code.

Therefore, businesses must consider the security risks posed to their web applications, especially the ones that handle sensitive user data, such as mobile banking, streaming services, online retailers, and e-commerce.

The frequent attacks against web applications include:

• Cross-site scripting.

• Man-in-the-middle and man-in-the-browser attacks. 

• Sensitive data leakage

• Customer journey hijacking.

According to an Accenture study in 2019, cybercrime could cost companies US$5.2 trillion over the next five years, says Accenture.

Security technologies are crucial for limiting client-side vulnerabilities and web application weaknesses exploitation by malicious actors.

Web application threats can destroy users' trust, business assets, brand loyalty, and companies' reputations. Hence, web application security is urgent for all organizations, regardless of the size or industry.

You can improve your web application’s security by following this quick checklist:

• Information gathering: Be aware of all third-party scripts and libraries used in your web application and ensure they are kept up-to-date.
  
  

• Authorization: Implement strong authorization controls to ensure only authorized users access specific resources and functionality.
  
  

• Cryptography: Use encryption methods to protect sensitive data during transmission and follow best practices to safely store and manage cryptographic keys.
  
  

• Denial of service: enhance an application’s resilience against denial of service threats.
  
  

Side note: it is mandatory to follow and apply other security-related measures, like Input Validation, Session Management, Error Handling and Logging, and Regular Security Testing, among others.

Web developers can build apps to prevent attackers from accessing sensitive data and performing client-side attacks.

The OWASP 10 updated list of common application security risks are:

1. Broken Access Control

2. Cryptographic Failures

3. Injection

4. Insecure Design

5. Security Misconfiguration

6. Vulnerable and Outdated Components

7. Identification and Authentication Failures

8. Software and Data Integrity Failures

9. Security Logging and Monitoring Failures

10. Server-Side Request Forgery
    
    

Therefore, we highlight some application security best practices for organizations and their vendors:

1. Develop a web application security blueprint.

2. Create an inventory of all web apps.

3. Require input validation.

4. Use solid authentication and authorization.

5. Perform the tracking of APIs.

6. Monitor web pages for changes.

7. Document code changes.

8. Review the client-side logic during a web application security test.

9. Prioritize security vulnerabilities.
   
   

Side note: web app security is an always-changing area and industry. Consequently, our best practices must be flexible and open to change as the cyber security attacks and vulnerabilities in the enterprise world also change.

More than 75% of cyberattacks target applications and their vulnerabilities. Web application security policies and solutions aim to protect applications through measures such as multi-factor authentication for users and web application firewalls.

Organizations must adopt application shielding and third-party management techniques to protect web apps from malicious actors. It includes protecting the client-side source code through a multi-layered approach while gaining visibility of all third-party code running on the web app or website.

Client-side security raises as a crucial web app security strategy. Why?

The modern enterprise world runs on apps, from online banking to e-commerce. Consequently, applications are a target for attackers who seek to identify and exploit vulnerabilities, such as issues related to open-source code, third-party scripts, and access control.

On September 1, 2023, Jscrambler announced its inclusion for the third consecutive year in Gartner’s® 2023 Hype Cycle for Application Security.

Jscrambler,  a leading client-side security solution for JavaScript in-app protection, delivers client-side security, streamlining compliance, visibility, and reporting.

Side note: The best way to ensure that JavaScript code is secure is by utilizing multiple layers of security solutions. This approach enables secure code to resist the threats posed by attackers.

Web skimming, also known as e-skimming or Magecart attacks, is about cybercriminals injecting malicious code into a website, typically on payment pages. This code is designed to capture sensitive information that users enter during the checkout process, such as credit card details, personal identification numbers, and other personal data. The stolen data is then transmitted to servers controlled by the attackers, who may use it for fraudulent transactions or sell it on the dark web.

• Target Identification: Attackers begin identifying vulnerable websites, often focusing on e-commerce sites due to their high traffic and volume of payment transactions. They look for outdated systems, unpatched software, or poorly secured third-party services integrated into the target website.
  
  

• Gaining Access: The entry point for web skimming can vary. Attackers may use known vulnerabilities in web platforms like content management systems (CMS) or e-commerce platforms that haven’t been updated or patched. Many websites use external plugins for various functionalities, such as ads, analytics, or payment gateways, and here attackers might infiltrate these third-party services, especially if they're not securely configured. Sometimes, the direct attack vector can be through phishing campaigns targeting employees of the company, and successfully deceiving an employee can provide attackers with the necessary credentials to access web application infrastructures.

  
  

• Injection of Skimming Code: Once access is obtained, attackers inject malicious JavaScript code into the website’s pages. This script is often:

  • Highly Obfuscated: To avoid detection, the malicious code is typically obfuscated, making it look benign or like legitimate analytics or payment scripts.

  • Dynamically Loaded: The malicious scripts may only activate under certain conditions to avoid raising suspicions, such as only executing when the checkout page is accessed or when certain form fields are interacted with.
    
    

• Data Capture: The skimming code is designed to listen for specific user actions, like filling out a payment form. When a user enters their payment information, the script captures this data in real time. The script can capture everything typed into a form field, even if the user does not submit the form.
  
  

• Exfiltration: The stolen data is then packaged and sent to a server controlled by the attackers. This transmission is often disguised to look like legitimate network traffic or is encrypted to bypass security measures that monitor for data leaks.
  
  

• Persistence and Spread: In more advanced skimming operations, the code might include mechanisms to maintain persistence on the infected site or to spread laterally to other parts of the web infrastructure, which could entail creating backdoors or compromising more accounts.

Web skimming represents a dangerous threat in the web security landscape, primarily due to its stealthy nature and potentially devastating impact. Awareness and proactive measures are key in combating these attacks. As cybercriminals continually refine their methods, the need for robust cybersecurity strategies becomes more critical. Here’s a list of best practices to adopt to prevent web skimming: 

• Regular Security Audits: Conducting regular security assessments can help identify and fix vulnerabilities that could be exploited by skimmers.

• Enhanced Monitoring: Implementing real-time monitoring tools to detect unusual script behaviors or unauthorized changes can alert administrators to potential breaches.

• Using Subresource Integrity: This feature for browsers aids to verify that resources fetched from servers are delivered without unexpected manipulation; it always uses cryptographic hashes to check the integrity of each script.

• Content Security Policy (CSP): Setting up a CSP can restrict the sources from which scripts can be loaded, significantly reducing the risk of malicious script injection.

• Third-Party Management: Since third-party services are a common vector for attacks, it’s really, really vital to audit and monitor all third-party components integrated into a website.

The implications of web skimming are severe. For individuals, it leads to financial loss and potential identity theft. For businesses, the consequences extend to damaged reputation, loss of customer trust, and potentially significant financial and legal repercussions. Businesses must stay vigilant, upgrade their security postures regularly, and ensure compliance with the latest security standards to protect themselves and their customers from this pervasive threat.

In addition to technical safeguards, it’s important to educate stakeholders about the risks and indicators of web skimming, including training employees, especially those involved in web development and maintenance, to recognize the signs of a potential breach and understand the best practices for securing web applications.

Collaboration among businesses, cybersecurity experts, and law enforcement can lead to better security protocols and quicker responses to threats. Sharing information about emerging threats, attack vectors, and effective countermeasures can help the entire industry stay one step ahead of cybercriminals.

The Jscrambler Client-Side Protection Platform safeguards first-party JavaScript through state-of-the-art obfuscation and exclusive runtime protection.

Its fine-grained JavaScript behavioral analysis also mitigates threats and risks posed by third-party tags all while ensuring compliance with the new PCI DSS v4 standard. With Jscrambler, businesses adopt a unified, future-proof client-side security policy all while achieving compliance with emerging security standards.

Trusted by digital leaders from several industries, including financial, healthcare, and entertainment, Jscrambler gives businesses the freedom to innovate securely.

Client-side vulnerabilities and web page protection in JavaScript go hand-in-hand when the concern is client-side security. JavaScript security threats and risks are a real concern. Moreover, JavaScript may represent a security vulnerability for businesses when the source code is provided by third-party providers, for example.

• First-Party JavaScript – The code an organization generates may have been secure when written. However, the code may have been tampered with after it went into production or reverse-engineered by malicious actors.

• Third-Party JavaScript – JavaScript code originating from third-party sources poses a significant risk because it has all the same privileges as first-party JavaScript code. Since there are no default security settings for third-party JavaScript, the organization that operates the website or app pulling in that code is responsible for enforcing security and continuous monitoring.

• Use of Forms and Secure Form Data – More than 90% of websites use forms to collect users’ personal information. Therefore, businesses must be committed to preventing breaches. On average, the personal information collected has a high level of exposure, involving more than 15 third-party domains, which increases the risk of unauthorized access to data and script misbehaviors.

Why do businesses need client-side security?

Client-side attacks have increased in cost and scale as companies expand their investments in the end-user digital experience. From Jscramblers’ experience, we give three fundamentals to start improvising the client-side security of your applications:

• Identify all third-party JavaScripts running on your web applications and website;

• Understand what these third-party JavaScripts are doing and why;

• Define which scripts are allowed to access data in forms on payment pages and block those that should not.

Web applications typically load 20 or more third-party scripts as part of the digital user experience. By not developing a client-side security strategy and approach, security teams allow third-party code libraries to run amok on their servers.

The relevance of third-party scripts for users’ digital experience creates a JavaScript supply chain, and the lack of client-side security measures generates potential vulnerabilities to a software supply chain implemented almost in real-time on users’ devices. That said:

• For businesses that accept online payments, users’ browsers may be facing a silent war.

• Website forms are open windows for data breaches.

• It is urgent to control third-party script behaviors on the client side, including tracking pixels and chatbots.

Web scraping is a way to automatically gather information from websites using special tools or computer programs. Instead of manually visiting a website to copy information, these tools do the job for you quickly.

Web scraping is useful for things like research, keeping track of prices, or watching for updates on a website without having to check it yourself all the time.

Think of it as having a helper who quickly reviews different web pages, picks out the important parts you need, and then puts all that information together in one place. This is done using special tools or programming languages like Python. 

Website scraping is used for other purposes, such as: 

Price Monitoring: price monitoring involves tracking prices on shopping websites to compare products, see what competitors charge, or understand how prices change over time.

Content Accumulation: Involves collecting information from various sources, such as news websites, blogs, or social media, and consolidating it in one place for easier access.

Market Survey: This type of survey examines data from online stores and forums to study trends, customer feedback, and product performance.

Monitoring Website Changes: Involves tracking specific web pages to detect any updates, such as product availability or newly posted regulations.

Review Analysis: This method analyzes reviews, comments, or social media posts to determine public sentiment toward a product, brand, or service.

Business Intelligence: This involves gathering information on competitors, market trends, and customer behavior to help make smart business decisions.

Sports Analysis: Website scraping in sports is used to track real-time scores, gather player and team statistics, compare betting odds, update schedules, analyze performance, and aggregate news to keep fans and analysts informed and engaged.

Beautiful Soup: A Python tool that helps you extract information from web pages, especially useful for organizing data from HTML and XML files.

Scrapy: Scrapy is an open-source tool that helps you gather and manage data from websites easily. It’s especially useful for large-scale web scraping projects.

Octoparse: Octoparse is an easy web scraping tool that doesn’t need any coding skills, making it perfect for beginners. It allows you to extract data by simply pointing and clicking, and it comes with ready-made templates for many popular websites.

Webscrapper: Webscrapper is an automated tool that helps you extract a large amount of data in minutes. It has a Chrome plugin and can be integrated with other systems. 

While website scraping is an excellent idea for collecting data, there are several limits that you may encounter while trying to extract this data.

​​Legal and Moral Issues: Most websites want to protect their data, so they have rules, called terms of service, that forbid scraping. Ignoring these rules can result in legal trouble.

Anti-Scraping Technology: Websites use different techniques to block scraping. They might use CAPTCHAs to make sure you’re a real person, block certain IP addresses to stop unwanted access, and limit how many times you can request information in a short period.

Website Restructuring: Many websites often change their design and layout to make things easier for users, keep up with new trends, or improve security. These changes can suddenly disrupt your scraping efforts, causing problems like missing data or making scraping stop working altogether.