Yonyou KSOA SQL Injection Vulnerability in Worksadd Plan JSP File

A SQL injection vulnerability has been identified in Yonyou KSOA version 9.0. The issue arises in the '/worksheet/worksadd_plan.jsp' file, where the application improperly handles the 'id' parameter in HTTP GET requests. This flaw allows remote, unauthenticated attackers to inject malicious SQL commands, potentially leading to unauthorized database access, data leakage, or manipulation of the database server. The vulnerability affects systems using Microsoft SQL Server.

Impact

Exploitation of this vulnerability allows for SQL injection, enabling attackers to execute arbitrary SQL commands. This could result in unauthorized access to the database, leakage or manipulation of sensitive data, and potentially gaining administrative control over the database server.

Reproduction

The vulnerability can be reproduced by sending a GET request to 'http://<target_ip>:<port>/worksheet/worksadd_plan.jsp' with the 'id' parameter manipulated to include SQL injection payloads. The injection can be verified by using payloads that, for example, cause a time delay, indicating successful exploitation.

Remediation

It is recommended to use prepared statements for database queries to prevent SQL injection. Input validation should be implemented to ensure that the 'id' parameter only contains expected values, such as integers. Additionally, deploying a Web Application Firewall (WAF) can help block common SQL injection patterns.