EUVD-2023-27250

Comprehensive Technical Analysis of EUVD-2023-27250

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in the SA-WR915ND router firmware v17.35.1 allows for remote code execution. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The scoring 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 special privileges are needed to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability results in a complete loss of confidentiality.
• Integrity (I): High (H) - The vulnerability results in a complete loss of integrity.
• Availability (A): High (H) - The vulnerability results in a complete loss of availability.

Given these factors, the vulnerability is highly critical and poses a significant risk to affected systems.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is network-based, meaning an attacker can exploit the vulnerability remotely without needing physical access to the device. Potential exploitation methods include:

• Remote Code Execution (RCE): An attacker could send specially crafted network packets to the router, leading to arbitrary code execution.
• Malware Distribution: The vulnerability could be used to distribute malware, turning the router into a botnet node or a launchpad for further attacks.
• Data Exfiltration: Sensitive information could be exfiltrated, including network traffic, user credentials, and configuration data.

3. Affected Systems and Software Versions

The vulnerability specifically affects the SA-WR915ND router running firmware version v17.35.1. It is crucial to identify all deployed instances of this router model and firmware version within the organization's network.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following steps should be taken:

• Firmware Update: Immediately update the router firmware to a patched version provided by the vendor.
• Network Segmentation: Implement network segmentation to isolate critical systems and reduce the attack surface.
• Firewall Rules: Configure firewall rules to restrict access to the router's management interface.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity and potential exploitation attempts.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address similar vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant threat to the European cybersecurity landscape, particularly for organizations and individuals relying on the affected router model. The potential for widespread exploitation could lead to data breaches, service disruptions, and compromised network integrity. Given the critical nature of the vulnerability, it is essential for European cybersecurity authorities to issue advisories and ensure that affected parties take immediate action.

6. Technical Details for Security Professionals

• Vulnerability Identification: The vulnerability is identified by EUVD ID EUVD-2023-27250 and is also known by the aliases CVE-2023-23150 and GSD-2023-23150.
• References: For further technical details, refer to the provided references:
  • Reference14
  • GitHub Gist
• Assigner: The vulnerability was assigned by Mitre.
• EPSS: The Exploit Prediction Scoring System (EPSS) score is not available (N/A), indicating that the likelihood of exploitation in the wild is unknown.
• ENISA ID: The ENISA ID for the product and vendor is not available (n/a), suggesting that further identification and tracking may be required.

Conclusion

The vulnerability in the SA-WR915ND router firmware v17.35.1 is critical and requires immediate attention. Organizations should prioritize updating the firmware and implementing robust security measures to mitigate the risk. Continuous monitoring and regular security assessments are essential to protect against similar vulnerabilities in the future.