EUVD-2024-1491

Comprehensive Technical Analysis of EUVD-2024-1491

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-1491, also known as CVE-2024-4264, is a remote code execution (RCE) issue in the berriai/litellm project. The vulnerability arises from the unsafe use of the eval function in the litellm.get_secret() method, particularly when the server interacts with Google KMS. Untrusted data is passed to the eval function without proper sanitization, allowing attackers to inject malicious code.

Severity Evaluation:

• CVSS Base Score: 9.8
• CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The high CVSS score indicates a critical vulnerability due to its potential for remote exploitation without user interaction, leading to high confidentiality, integrity, and availability impacts.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Environment Variable Injection: Attackers can inject malicious values into environment variables through the /config/update endpoint, which updates settings in proxy_server_config.yaml.
• Unsanitized Data: The eval function processes unsanitized data, allowing for the execution of arbitrary code.

Exploitation Methods:

• Code Injection: By crafting specific payloads, attackers can inject code that will be executed by the eval function.
• Configuration Manipulation: Attackers can manipulate the configuration settings to introduce malicious code that will be executed during the normal operation of the server.

3. Affected Systems and Software Versions

Affected Systems:

• Any system running the berriai/litellm project that utilizes Google KMS and has the /config/update endpoint exposed.

Software Versions:

• All versions of berriai/litellm up to the latest release at the time of the vulnerability disclosure.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Disable the /config/update Endpoint: Temporarily disable the /config/update endpoint to prevent configuration updates until a patch is applied.
• Input Sanitization: Implement strict input sanitization for all environment variables and configuration settings.

Long-Term Mitigation:

• Patch Deployment: Apply the official patch provided by the berriai/litellm maintainers as soon as it is available.
• Code Review: Conduct a thorough code review to identify and remediate similar vulnerabilities.
• Security Audits: Regularly perform security audits and penetration testing to identify and mitigate potential vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using the berriai/litellm project, particularly those in critical sectors such as finance, healthcare, and government. The potential for remote code execution can lead to data breaches, service disruptions, and unauthorized access to sensitive information. This underscores the importance of robust security practices and timely patch management in the European cybersecurity landscape.

6. Technical Details for Security Professionals

Vulnerable Code Sections:

• litellm.get_secret() Method: The method uses the eval function unsafely, allowing for the execution of arbitrary code.
• /config/update Endpoint: This endpoint allows for the update of settings in proxy_server_config.yaml, which can be manipulated to inject malicious values.

References:

• NVD Entry: CVE-2024-4264
• GitHub Repository: BerriAI/litellm
• Specific Code Lines:
  • proxy_server.py#L2104-L2108
  • proxy_server.py#L2118
  • proxy_server.py#L2509-L2517
  • proxy_server.py#L2562-L2577
  • utils.py#L9867-L9885

Additional Resources:

• Huntr Bounty: Huntr Bounty

Conclusion: This vulnerability highlights the critical importance of secure coding practices, particularly in handling user inputs and configuration settings. Organizations must prioritize timely patching and continuous monitoring to mitigate such risks effectively.