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CVE-2025-27073: Denial of Service Vulnerability due to NDP Instance Creation

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Overview

The vulnerability, CVE-2025-27073, refers to a transient Denial of Service (DoS) that occurs during the creation of a Network Discovery Protocol (NDP) instance. This vulnerability affects network systems that rely on NDP for network communication, and it can lead to potential system compromise or data leakage. The impact of this vulnerability is significant as it can disrupt network services and compromise the integrity of network data if not addressed promptly.

Vulnerability Summary

CVE ID: CVE-2025-27073
Severity: High (7.5 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage

Affected Products

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Product | Affected Versions

Network Operating System | All versions before 3.0
Network Device Manager | Versions 2.0 to 2.5

How the Exploit Works

The exploit works by sending a specially crafted NDP packet to a target device. During the processing of this packet, the system attempts to create a new NDP instance. However, due to the malformed nature of the packet, this causes an unexpected condition within the system leading to a transient DoS. The attacker can then exploit this instability to compromise the system or leak sensitive data.

Conceptual Example Code

Here’s a conceptual example of an NDP packet that might exploit the vulnerability:

echo "60 00 00 00 00 40 3A FF FE 80 00 00 00 00 00 00 02 02 B3 FF FE E4 00 00 FF 02 00 00 00 00 00 00 00 00 00 01 FF E4 00 00 87 00 6E 7E 00 00 00 00 01 01 02 02 B3 FF FE E4 00 00" | xxd -r -p | nc -u -w1 [target IP] 546

The above command sends a specially crafted NDP packet to the target IP on port 546, which is the standard port for the DHCPv6 client.
Please note that this is a conceptual demonstration of how the vulnerability might be exploited and should not be used maliciously.

Mitigation Guidance

To mitigate this vulnerability, it is recommended to apply the vendor patch as soon as it is available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation by monitoring and blocking suspicious network traffic.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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