Source: cna@vuldb.com
A flaw has been found in Yonyou KSOA 9.0. Affected by this vulnerability is an unknown functionality of the file /worksheet/work_update.jsp. This manipulation of the argument Report causes sql injection. The attack can be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Yonyou KSOA 9.0 is vulnerable to a critical SQL injection flaw, allowing remote attackers to execute arbitrary SQL commands. This vulnerability, located in the /worksheet/work_update.jsp file, can lead to data breaches, system compromise, and loss of confidentiality. The vendor has not provided a patch, increasing the risk of widespread exploitation.
Step 1: Payload Delivery: An attacker crafts a malicious HTTP request targeting the /worksheet/work_update.jsp endpoint. The request includes a crafted Report parameter containing a SQL injection payload.
Step 2: Request Processing: The vulnerable application receives the HTTP request and processes the Report parameter value.
Step 3: SQL Query Construction: The application constructs a SQL query using the unsanitized Report parameter value.
Step 4: Query Execution: The database server executes the maliciously crafted SQL query.
Step 5: Data Exfiltration/System Compromise: The attacker's injected SQL code allows them to perform actions such as reading sensitive data, modifying database contents, or potentially gaining remote code execution (RCE) depending on the database configuration and the complexity of the injected payload.
The vulnerability stems from insufficient input validation on the Report parameter within the /worksheet/work_update.jsp file. Specifically, the application fails to properly sanitize user-supplied input before incorporating it into a SQL query. This allows an attacker to inject malicious SQL code, which is then executed by the database server. The lack of parameterized queries or prepared statements exacerbates the issue, making it easier for attackers to craft effective payloads. The root cause is a missing or inadequate input validation mechanism, allowing for the direct injection of SQL commands.
While no specific APTs are directly linked to this CVE, the ease of exploitation and the potential impact (data breaches, system compromise) make it attractive to various threat actors. This vulnerability could be leveraged by financially motivated groups, nation-state actors, or opportunistic attackers. CISA KEV status is likely to be high if the vulnerability is actively exploited.
Network Intrusion Detection Systems (NIDS) should be configured to detect SQL injection attempts. Look for suspicious patterns in HTTP requests, such as the use of SQL keywords (e.g., SELECT, INSERT, UPDATE, DELETE, UNION, WHERE) within the Report parameter.
Web Application Firewalls (WAFs) can be deployed to filter malicious requests. Configure the WAF to block requests containing SQL injection payloads.
Review web server access logs for unusual activity, such as a high volume of requests to /worksheet/work_update.jsp or requests containing suspicious parameter values.
Monitor database server logs for unexpected queries or errors that may indicate SQL injection attempts.
Implement file integrity monitoring to detect any unauthorized changes to the /worksheet/work_update.jsp file or related files.
Implement input validation and sanitization on the Report parameter. Ensure that all user-supplied input is properly validated and sanitized before being used in SQL queries. This includes filtering out or escaping special characters that could be used in SQL injection attacks.
Use parameterized queries or prepared statements. This is the most effective way to prevent SQL injection. Parameterized queries treat user-supplied input as data, not as executable code.
Apply the principle of least privilege. The database user account used by the application should have only the necessary permissions to perform its tasks. This limits the potential damage from a successful SQL injection attack.
Regularly update the Yonyou KSOA software to the latest version. While a patch is not yet available, monitor for updates from the vendor.
Implement a Web Application Firewall (WAF) to filter malicious traffic.
Conduct regular vulnerability scans to identify and address security weaknesses.