EUVD-2025-199783

Comprehensive Technical Analysis of EUVD-2025-199783

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-199783 pertains to Anyscale Ray version 2.52.0, which has an insecure default configuration. Specifically, token-based authentication for Ray management interfaces, including the dashboard and Jobs API, is disabled by default. This configuration allows remote attackers with network access to submit jobs and execute arbitrary code on the Ray cluster.

Severity Evaluation:

• Base Score: 9.3 (CVSS 4.0)
• Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

The high base score indicates a critical vulnerability due to the potential for unauthorized access and arbitrary code execution, which can lead to significant confidentiality, integrity, and availability impacts.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network Access: An attacker with network access to the Ray management interfaces can exploit this vulnerability.
• Unauthenticated Access: The default configuration allows unauthenticated access to critical interfaces, enabling attackers to submit jobs and execute code.

Exploitation Methods:

• Job Submission: Attackers can submit malicious jobs to the Ray cluster, leading to arbitrary code execution.
• Dashboard Access: Unauthorized access to the dashboard can reveal sensitive information about the cluster's operations and configurations.
• API Exploitation: The Jobs API can be manipulated to inject malicious code or commands, compromising the cluster's integrity.

3. Affected Systems and Software Versions

Affected Software:

• Anyscale Ray version 2.52.0

Affected Systems:

• Any system running Anyscale Ray 2.52.0 with the default configuration, where token-based authentication is not explicitly enabled.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Enable Token Authentication: Set the environment variable RAY_AUTH_MODE=token to enable token-based authentication for the Ray management interfaces.
• Network Segmentation: Restrict network access to the Ray management interfaces to trusted networks and devices.
• Monitoring and Logging: Implement robust monitoring and logging to detect and respond to unauthorized access attempts.

Long-Term Mitigation:

• Update to Secure Versions: Plan for future updates where the vendor intends to enable token authentication by default.
• Regular Security Audits: Conduct regular security audits and configuration reviews to ensure secure settings.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using Anyscale Ray, particularly those in critical sectors such as finance, healthcare, and government. Unauthorized access and arbitrary code execution can lead to data breaches, service disruptions, and potential financial losses. The European cybersecurity landscape must prioritize addressing such vulnerabilities to maintain the integrity and security of digital infrastructures.

6. Technical Details for Security Professionals

Configuration Settings:

• RAY_AUTH_MODE: This environment variable should be set to token to enable token-based authentication.
• Token Management: Ensure that tokens are securely generated, stored, and rotated to prevent unauthorized access.

Detection and Response:

• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activities on the Ray management interfaces.
• Incident Response Plan: Develop and maintain an incident response plan specific to unauthorized access and code execution scenarios.

References:

• Documentation: Ray Token Authentication
• Advisories: GHSA-w8vc-465m-jjw6
• Vulnerability Details: VulnCheck Advisory
• NVD Entry: CVE-2025-34351

By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of unauthorized access and arbitrary code execution, thereby safeguarding their digital assets and operations.