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] 546The 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.
