Web vulnerability front-end modification

With the rapid development of the Internet, more and more applications have begun to rely on Web services to provide information and services. However, these web applications expose many security vulnerabilities, the most common of which are web vulnerabilities. Web vulnerabilities refer to security weaknesses in a web application that can be exploited by attackers due to defects, errors, or vulnerabilities. Attackers can attack the system through web vulnerabilities, obtain sensitive information, steal accounts, destroy websites or hijack user data, and even go further to conduct denial-of-service attacks (DDoS) on web services.

The root cause of Web vulnerabilities is that developers usually do not have enough security awareness or the ability to identify and fix vulnerabilities. In fact, many web application vulnerabilities are fundamentally caused by front-end code and design issues.

The main cause of front-end code vulnerabilities is that programmers have insufficient understanding of web standards or do not have the experience to deal with these problems. The front-end interface of a web application is usually rendered in the browser and consists of HTML, CSS and JavaScript. These pages can be modified at will by attackers, causing them to mistakenly believe that the modifications come from legitimate sources, causing them to unknowingly leak sensitive information or perform repeated wrong operations.

The following are some common front-end vulnerabilities:

1. XSS (Cross-site scripting attack): An attacker can steal the victim's cookies and passwords by inserting JavaScript code into the input box. Session ID and other data.
2. CSRF (cross-site request attack): The attacker constructs a forged request so that the user can execute the request without their knowledge.
3. DOM type XSS: The attacker uses JavaScript to modify the DOM content of the page, causing the user to execute and leak local cookie information.

Front-end vulnerability repair method:

1. HTTPS: Use HTTPS to encrypt all user data.
2. Input verification: For data submitted by users, the front end should filter and verify it, such as limiting the range of input data, avoiding special characters and injected codes, etc.
3. Reduced privileges: In order to prevent malicious attackers from attacking, the front-end code needs to reduce privileges, and critical data can only be processed on the server side.
4. Coding standards: Code standards help discover and prevent potential vulnerabilities. Coding standards require that all code be reviewed and tested, which helps ensure the security of web applications.
5. Security training: Security training for developers can help improve their ability to identify and resolve common web vulnerabilities. This reduces the occurrence of vulnerabilities.
6. Continuous monitoring: Web applications often use continuous monitoring to detect and fix vulnerabilities. Through regular testing and evaluation, you can help detect and fix security vulnerabilities and reduce the probability of being attacked.

Summary:

Web vulnerabilities bring great security risks to web applications, and most of the web vulnerabilities are caused by front-end code security issues. By strengthening the review and verification of front-end code security, and increasing the security awareness training of team members, the occurrence of such security vulnerabilities can be greatly reduced in terms of application design optimization.

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