CVE-2003-0554 in Direct Connect
Summary
by MITRE
NeoModus Direct Connect 1.0 build 9, and possibly other versions, allows remote attackers to cause a denial of service (connection and possibly memory exhaustion) via a flood of ConnectToMe requests containing arbitrary IP addresses and ports.
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Analysis
by VulDB Data Team • 05/03/2019
The vulnerability described in CVE-2003-0554 represents a significant denial of service weakness in NeoModus Direct Connect 1.0 build 9 and potentially other versions of the software. This issue manifests when remote attackers exploit the application's handling of ConnectToMe requests, which are fundamental communication elements within the Direct Connect protocol used for peer-to-peer file sharing networks. The flaw specifically targets the application's ability to process incoming connection requests and can result in system instability or complete service unavailability.
The technical implementation of this vulnerability stems from inadequate input validation and resource management within the Direct Connect client software. When the application receives a flood of ConnectToMe requests containing arbitrary IP addresses and ports, it fails to properly validate the incoming data or implement rate limiting mechanisms. This lack of proper sanitization allows attackers to overwhelm the system with malformed connection requests that can exhaust available resources or cause the application to crash. The vulnerability operates at the network protocol level, where the software's connection handling logic does not adequately distinguish between legitimate and malicious requests, making it susceptible to resource exhaustion attacks.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise system stability and availability. Attackers can leverage this weakness to consume system resources such as memory, CPU cycles, and network connections, leading to complete denial of service conditions that affect both the targeted system and potentially the broader network infrastructure. The vulnerability affects the core functionality of the Direct Connect protocol implementation, which is commonly used in peer-to-peer file sharing environments, making it particularly concerning for systems that rely on these communication protocols for legitimate operations.
From a cybersecurity perspective, this vulnerability aligns with CWE-400, which categorizes "Uncontrolled Resource Consumption" as a critical weakness that can lead to denial of service conditions. The attack pattern corresponds to techniques described in the MITRE ATT&CK framework under the "Resource Exhaustion" tactic, where adversaries consume system resources to prevent legitimate use of services. Organizations using NeoModus Direct Connect software should implement immediate mitigations including network-level rate limiting, firewall rules to restrict connection attempts, and monitoring for unusual connection patterns. The vulnerability also highlights the importance of proper input validation and resource management in network applications, particularly those handling real-time communication protocols where malformed data can lead to system instability.
The broader implications of this vulnerability demonstrate how seemingly minor protocol implementation flaws can create significant security risks in peer-to-peer networking environments. The weakness exposes the fundamental importance of robust error handling and resource management in network applications, particularly those that must process untrusted input from remote peers. System administrators should consider implementing additional security controls such as connection throttling, automatic system monitoring, and regular security assessments to prevent exploitation of similar weaknesses in other network protocols and applications. This vulnerability serves as a reminder of the critical need for security-by-design principles in network communication software and the importance of regular security updates and patches to address known weaknesses in legacy systems.