EUVD-2024-21540

Comprehensive Technical Analysis of EUVD-2024-21540

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in EUVD-2024-21540 affects the Ruijie RG-NBS2009G-P RGOS v.10.4(1)P2 Release(9736). This issue allows a remote attacker to gain privileges via the system/config_menu.htm page. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Privileges Required (PR): None (N) - No privileges are required to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - There is a high impact on confidentiality.
• Integrity (I): High (H) - There is a high impact on integrity.
• Availability (A): High (H) - There is a high impact on availability.

The EPSS (Exploit Prediction Scoring System) score of 59 suggests a moderate likelihood of exploitation in the wild.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is through the network, specifically targeting the system/config_menu.htm page. Potential exploitation methods include:

• Unauthenticated Access: An attacker could exploit the vulnerability without needing any credentials.
• Privilege Escalation: Once access is gained, the attacker could escalate privileges to perform unauthorized actions.
• Remote Code Execution: The attacker might inject malicious code to execute arbitrary commands on the affected system.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Device: Ruijie RG-NBS2009G-P
• Software Version: RGOS v.10.4(1)P2 Release(9736)

Other versions of RGOS and similar devices should be checked for similar vulnerabilities.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Patch Management: Apply the latest security patches and updates provided by the vendor.
• Network Segmentation: Isolate critical systems and devices to limit the attack surface.
• Access Control: Implement strict access controls and authentication mechanisms.
• Monitoring and Logging: Enhance monitoring and logging to detect and respond to suspicious activities.
• Intrusion Detection Systems (IDS): Deploy IDS to identify and alert on potential exploitation attempts.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using the affected Ruijie devices, particularly in critical infrastructure sectors such as telecommunications, healthcare, and finance. The high CVSS score and the potential for remote exploitation make it a critical concern for European cybersecurity. Organizations should prioritize patching and implementing robust security measures to protect against potential attacks.

6. Technical Details for Security Professionals

For security professionals, the following technical details are essential:

• Vulnerability Identification: The vulnerability is identified by EUVD-2024-21540, CVE-2024-24116, and GSD-2024-24116.
• References:
  • GitHub Repository
  • Gist
• Exploitation Details: The vulnerability can be exploited by accessing the system/config_menu.htm page without authentication, leading to privilege escalation and potential remote code execution.
• Mitigation Steps:
  • Immediate Action: Apply the vendor-provided patch.
  • Long-Term Strategy: Implement a comprehensive security framework including regular vulnerability assessments, patch management, and incident response planning.

By addressing this vulnerability promptly and effectively, organizations can significantly reduce the risk of a successful attack and maintain the integrity and security of their systems.