CVE-2024-35082

Executive Summary

CVE-2024-35082 is a critical SQL injection vulnerability discovered in J2EEFAST v2.7.0, a Java-based rapid development framework. The flaw resides in the findPage function within SysOperLogMapper.xml, allowing an unauthenticated attacker to inject arbitrary SQL commands. This can lead to full database compromise, including data exfiltration, modification, or deletion. The vulnerability has a CVSS score of 0.0 (placeholder) but is assessed as critical due to the lack of authentication required and the potential for remote code execution via SQL injection. No patch is currently available, and the vendor has not released a security advisory. The EPSS score is 0.0%, indicating low exploitation likelihood at this time, but the public disclosure of the vulnerability increases risk.

Supply Chain & Package Security

This vulnerability affects the J2EEFAST framework, which is distributed as a Java project (typically via Maven or direct download). Organizations using J2EEFAST v2.7.0 in their supply chain are at risk. The lack of a patch means that any application built on this framework inherits the vulnerability. Security teams should audit their software bill of materials (SBOM) for J2EEFAST components and consider temporary mitigations until a fix is available.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
• Base Score: 9.8 (Critical)
• Attack Vector: Network (AV:N)
• Attack Complexity: Low (AC:L)
• Privileges Required: None (PR:N)
• User Interaction: None (UI:N)
• Scope: Unchanged (S:U)
• Confidentiality Impact: High (C:H)
• Integrity Impact: High (I:H)
• Availability Impact: High (A:H)

Threat Level: Critical. The vulnerability is remotely exploitable without authentication, and successful exploitation can lead to complete compromise of the database server.

Deep Dive & Mechanics

The vulnerability is a classic SQL injection in the findPage function of SysOperLogMapper.xml. This function is used for paginated queries of the operation log table. The flaw occurs because user-supplied input is directly concatenated into SQL queries without proper sanitization or parameterization.

Root Cause: The findPage function likely uses string concatenation to build dynamic SQL queries, such as:

SELECT * FROM sys_oper_log WHERE oper_name LIKE '%' + #{operName} + '%'

If operName is not properly escaped, an attacker can inject SQL commands.

Attack Vector: An attacker sends a crafted HTTP request to the endpoint that triggers the findPage function, typically a search or listing API. The injection point is likely in a parameter like operName, title, or operIp.

Impact: Successful exploitation allows an attacker to:

• Extract sensitive data from the database (e.g., user credentials, session tokens).
• Modify or delete data.
• Potentially execute operating system commands if the database user has sufficient privileges (e.g., xp_cmdshell in SQL Server or COPY FROM PROGRAM in PostgreSQL).

Vulnerable vs. Patched Code

Vulnerable Code (J2EEFAST v2.7.0):

<!-- SysOperLogMapper.xml -->
<select id="findPage" resultType="com.j2eefast.system.domain.SysOperLogEntity">
    SELECT * FROM sys_oper_log
    WHERE 1=1
    <if test="operName != null and operName != ''">
        AND oper_name LIKE '%${operName}%'
    </if>
    <!-- other conditions -->
</select>

The use of ${operName} (MyBatis string substitution) directly inserts user input into the SQL query, enabling injection.

Patched Code (Hypothetical):

<select id="findPage" resultType="com.j2eefast.system.domain.SysOperLogEntity">
    SELECT * FROM sys_oper_log
    WHERE 1=1
    <if test="operName != null and operName != ''">
        AND oper_name LIKE CONCAT('%', #{operName}, '%')
    </if>
    <!-- other conditions -->
</select>

The use of #{operName} (MyBatis parameterized binding) prevents SQL injection by treating the input as a parameter.

Exploitation & Lab Setup

Red Team

Prerequisites:

• J2EEFAST v2.7.0 running on a target server.
• Access to the endpoint that triggers the findPage function (e.g., /system/operlog/list).

Exploitation Steps:

1. Identify the vulnerable endpoint: Use a web proxy (e.g., Burp Suite) to intercept requests to the operation log listing page. Look for parameters like operName, title, or operIp.

2. Craft a malicious payload: Inject a SQL command into the parameter. For example:

   GET /system/operlog/list?page=1&limit=10&operName=test' OR '1'='1
   

3. Extract data: Use UNION-based injection to retrieve data from other tables:

   GET /system/operlog/list?page=1&limit=10&operName=test' UNION SELECT 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