A recent vulnerability in the popular rapid development platform Jeecg-boot (v3.4.3) has been discovered and assigned the Common Vulnerabilities and Exposures (CVE) identifier CVE-2022-45207. This critical vulnerability affects the component updateNullByEmptyString, leading to potential SQL injection attacks due to the improper sanitization of user inputs. This article provides a detailed explanation of the vulnerability, the related code snippets, exploitation techniques, and references to the original sources.

Vulnerability Details

Jeecg-boot is a widely used Java-based rapid development platform that streamlines the process of web application development. In version 3.4.3 of Jeecg-boot, the updateNullByEmptyString component has a critical weakness in its handling of user-supplied inputs, making it prone to SQL injection attacks.

This vulnerability allows an attacker to submit specially crafted data that, when processed by the affected component, can lead to arbitrary SQL execution. Upon successful exploitation, attackers could potentially gain unauthorized access to sensitive data, modify database contents, or even execute arbitrary commands on the victim's system.

As per the OWASP Top 10 list of security risks, SQL injection is a prevalent and dangerous vulnerability that developers must take seriously and ensure proper mitigations are in place.

Code Snippet

The root cause of this vulnerability lies in the updateNullByEmptyString component, where user-supplied inputs are not correctly sanitized before being processed. Here's an example code snippet showcasing the affected component:

public void updateNullByEmptyString() {
  String sql = "UPDATE tableName SET columnName='' WHERE columnName IS NULL;";
  executeUpdate(sql);
}

In this code snippet, the 'columnName' and 'tableName' values are directly used in the SQL query without proper sanitization or validation, creating a risk of SQL injection attacks.

Exploitation

Exploiting this vulnerability involves crafting malicious data containing special SQL characters and injecting it into the vulnerable component. For example, an attacker might send a payload similar to the following:

columnName = "user; DROP TABLE users;"

If the application doesn't sanitize this input correctly, it can lead to the direct execution of the SQL payload sent by the attacker, such as deleting an entire database table.

Original References

1. Official CVE record for CVE-2022-45207: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-45207
2. Jeecg-boot GitHub repository: https://github.com/zhangdaiscott/jeecg-boot
3. OWASP Top Ten Project: https://owasp.org/www-project-top-ten/

To prevent SQL injection attacks, it's crucial to follow secure coding practices, including

1. Input validation: Validate user-supplied inputs to ensure they conform to the expected format and type.
2. Parameterized queries: Use parameterized queries or prepared statements to separate SQL query structure from data.
3. Escaping user inputs: Implement proper data escaping techniques to render special characters harmless.

Please follow these recommendations and review the official Jeecg-boot repository for potential updates addressing this issue.

Conclusion

CVE-2022-45207 is a critical vulnerability affecting Jeecg-boot v3.4.3 via the updateNullByEmptyString component, enabling potential SQL injection attacks. This article has provided an overview of the vulnerability, code, exploitation details, and links to original references. Adhering to secure coding practices and regularly reviewing the Jeecg-boot documentation and updates can help mitigate such risks and ensure the security of your applications.

Timeline

Published on: 11/25/2022 17:15:00 UTC
Last modified on: 11/28/2022 19:42:00 UTC