CVE-2004-1705 in Citadel
Summary
by MITRE
Buffer overflow in Citadel/UX 6.23 and earlier allows remote attackers to cause a denial of service via a long username.
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Analysis
by VulDB Data Team • 11/08/2024
The vulnerability identified as CVE-2004-1705 represents a critical buffer overflow flaw within Citadel/UX version 6.23 and earlier implementations. This security weakness specifically manifests in the username handling mechanism of the Citadel/UX messaging and collaboration system, which is a multi-user server-based application designed for networked environments. The buffer overflow occurs when the system processes user authentication requests containing excessively long username strings, creating a condition where memory boundaries are exceeded during data processing operations.
This technical flaw falls under the Common Weakness Enumeration category of buffer overflow vulnerabilities, specifically classified as CWE-121 which encompasses stack-based buffer overflow conditions. The vulnerability exists due to insufficient input validation and bounds checking within the username parsing routines of the Citadel/UX server component. When an attacker submits a username exceeding the allocated buffer size, the excess data overflows into adjacent memory regions, potentially corrupting critical system structures or causing the application to crash. The flaw is particularly concerning because it operates at the authentication layer, making it accessible to remote attackers without requiring prior authentication credentials.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it can be exploited to disrupt legitimate service availability for all users within the affected network. The remote exploitation capability means that attackers can target the system from outside the local network perimeter, making this vulnerability particularly dangerous in internet-facing environments. When successfully exploited, the buffer overflow causes the Citadel/UX service to terminate abruptly, resulting in complete service disruption for all authenticated and unauthenticated users attempting to access the messaging system. This type of denial of service attack can be particularly damaging in enterprise environments where the system serves as a critical communication infrastructure for business operations.
Mitigation strategies for CVE-2004-1705 should prioritize immediate patching of affected Citadel/UX installations to version 6.24 or later, which contains the necessary fixes for the buffer overflow condition. Network administrators should implement input validation measures at network boundaries to filter out excessively long username strings before they reach the vulnerable application. Additionally, monitoring systems should be deployed to detect unusual authentication patterns or service disruptions that may indicate exploitation attempts. The vulnerability demonstrates the importance of implementing proper input sanitization and bounds checking in server applications, aligning with defensive programming practices recommended in the software security domain. Organizations should also consider implementing intrusion detection systems that can identify and alert on potential buffer overflow exploitation attempts, as this vulnerability operates through predictable attack vectors that can be detected through network traffic analysis.