The Common Vulnerabilities and Exposures (CVE) project has recently released information about a newly discovered security vulnerability, labeled as CVE-2024-2169, impacting the implementations of the User Datagram Protocol (UDP) application. This severe vulnerability pertains to network loops and may potentially be exploited by unauthenticated attackers to execute maliciously-crafted packets against susceptible implementations, which could result in Denial of Service (DOS) and/or abuse of resources.

Vulnerability Description

The CVE-2024-2169 vulnerability is associated with the UDP application protocol, a core part of the Internet Protocol suite. As opposed to TCP, UDP is specifically designed to provide connectionless, unreliable, and fast communication methods across the internet. As a consequence of these characteristics, UDP is commonly used in applications that require low-latency communication, such as gaming, streaming, and Voice over IP (VoIP).

The vulnerability primarily affects the lack of proper checks and validations in the interconnection of two or more implementations of the UDP protocol. In certain instances, this might result in a network loop where packets continuously propagate between UDP implementations.

Exploit Details

An attacker who is capable of exploiting this vulnerability can craft malicious packets and inject them into a network loop, potentially causing a Denial of Service (DOS) event. These packets can consume network resources, degrade performance, or even lead to a complete unavailability of the service. Furthermore, these packets can also be employed to abuse available resources such as bandwidth, which might increase costs or hamper legitimate services.

Code Snippet

The following Python code snippet demonstrates how an attacker could craft malicious packets by utilizing the socket library:

import socket

UDP_IP_ADDRESS = "10...1"
UDP_PORT = 9999
MESSAGE = "MaliciousPayload"

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.sendto(MESSAGE.encode("utf-8"), (UDP_IP_ADDRESS, UDP_PORT))

The code above effectively generates a malicious payload named 'MaliciousPayload', which is subsequently transmitted to the targeted vulnerable UDP application over the specified IP address and port number.

To gain a more comprehensive understanding of the CVE-2024-2169 vulnerability and its potential repercussions, it's crucial to consult the associated CVE report and relevant technical literature. Here is a list of the original sources and references:

1. CVE - CVE-2024-2169 - The official Mitre's CVE webpage detailing the CVE-2024-2169 vulnerability.
2. CERT Coordination Center - Vulnerability Note VU#162080 - The CERT/CC vulnerability note that includes mitigation steps and recommendations.
3. Internet Engineering Task Force (IETF) - RFC 768 - A detailed specification of the technical aspects of the UDP protocol.
4. National Vulnerability Database (NVD) - CVE-2024-2169 - A comprehensive description and analysis of the vulnerability by the National Institute of Standards and Technology (NIST).

Potential Mitigation Strategies

Organizations should prioritize reviewing their deployments of UDP-based applications and consider implementing one or more of the following mitigation strategies:

- Limit the source IP addresses allowed to send packets to UDP services by employing access control lists (ACLs) and firewalls.

Regularly audit logs and network traffic to detect any unusual activity.

- Where possible, consider implementing rate-limiting techniques to lessen the potential impact of a DOS attack.
- Employ Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS) to automatically detect and block malicious network activities.

Until an official patch or update addressing CVE-2024-2169 is released, it's crucial to stay vigilant and remain informed of any emerging developments surrounding this vulnerability.


Published on: 03/19/2024 20:15:07 UTC
Last modified on: 03/20/2024 13:00:16 UTC