EUVD-2025-20212

Comprehensive Technical Analysis of EUVD-2025-20212

1. Vulnerability Assessment and Severity Evaluation

The vulnerability in langgenius/dify versions 1.1.0 to 1.1.2 allows for unsanitized input in the code node, leading to the execution of arbitrary code with full root permissions. This vulnerability is critical due to its potential for complete system compromise. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a high severity, reflecting the ease of exploitation and the significant impact on confidentiality, integrity, and availability.

CVSS Vector Breakdown:

• AV:N (Network Vector): The vulnerability can be exploited remotely over the network.
• AC:L (Low Complexity): The attack requires low skill or resources to exploit.
• PR:N (No Privileges Required): No prior authentication is needed to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required for the exploit to succeed.
• S:U (Unchanged Scope): The vulnerability does not change the security scope.
• C:H (High Confidentiality Impact): Complete loss of confidentiality.
• I:H (High Integrity Impact): Complete loss of integrity.
• A:H (High Availability Impact): Complete loss of availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Code Execution (RCE): An attacker can inject malicious code through unsanitized input, leading to arbitrary code execution with root privileges.
• Function Overriding: The ability to override global functions in JavaScript, such as parseInt, before sandbox security restrictions are imposed, can be exploited to bypass security measures.

Exploitation Methods:

• Code Injection: An attacker can inject malicious code into the code node, which will be executed with root permissions.
• Function Manipulation: By overriding global functions, an attacker can manipulate the behavior of the application to gain unauthorized access to sensitive information or internal network servers.

3. Affected Systems and Software Versions

Affected Software:

• langgenius/dify versions 1.1.0 to 1.1.2

Affected Systems:

• Any system running the vulnerable versions of langgenius/dify, including but not limited to:
  • Web servers hosting dify.ai
  • Internal network servers accessible through dify.ai
  • Systems storing secret keys and other sensitive information

4. Recommended Mitigation Strategies

Immediate Actions:

• Upgrade to Version 1.1.3: Immediately upgrade to langgenius/dify version 1.1.3, which resolves the vulnerability.
• Temporary Workarounds: If upgrading is not immediately possible, consider implementing temporary workarounds such as disabling the affected code node or applying additional input sanitization measures.

Long-Term Mitigation:

• Regular Patch Management: Implement a robust patch management process to ensure timely updates and patches.
• Input Validation: Enhance input validation and sanitization mechanisms to prevent unsanitized input from reaching critical code nodes.
• Security Audits: Conduct regular security audits and code reviews to identify and mitigate potential vulnerabilities.
• Network Segmentation: Implement network segmentation to limit the lateral movement of attackers within the internal network.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using langgenius/dify, particularly those within the European Union. The potential for unauthorized access to secret keys, internal network servers, and lateral movement within dify.ai can lead to data breaches, financial loss, and reputational damage. The high severity of this vulnerability underscores the importance of timely patching and robust cybersecurity practices within the European cybersecurity landscape.

6. Technical Details for Security Professionals

Vulnerability Details:

• Root Cause: The vulnerability arises from the ability to override global functions in JavaScript before sandbox security restrictions are imposed, allowing for unsanitized input in the code node.
• Exploit Mechanism: An attacker can inject malicious code through the code node, which will be executed with root permissions. The overriding of global functions can be used to bypass security measures and gain unauthorized access.

Detection and Response:

• Log Analysis: Monitor logs for unusual activity, such as unexpected function overrides or code execution attempts.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious network traffic and behavior.
• Incident Response Plan: Develop and implement an incident response plan to quickly identify, contain, and mitigate the impact of any successful exploitation.

References:

• Huntr Bounty Report
• GitHub Commit

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