CVE-2004-2673 in FTP Server
Summary
by MITRE
Multiple buffer overflows in ArGoSoft FTP Server before 1.4.1.6 allow remote authenticated users to cause a denial of service and possibly execute arbitrary code via (1) a SITE ZIP command with a long first or second argument, or (2) a SITE COPY with a long argument.
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Analysis
by VulDB Data Team • 07/05/2025
The vulnerability identified as CVE-2004-2673 represents a critical security flaw in the ArGoSoft FTP Server software affecting versions prior to 1.4.1.6. This issue manifests through multiple buffer overflow conditions that can be exploited by authenticated remote attackers to compromise system integrity and availability. The vulnerability specifically targets the server's handling of certain SITE commands, which are extension commands used for administrative operations within FTP protocols. These buffer overflows occur when the server fails to properly validate input lengths for specific command arguments, creating exploitable conditions that can lead to system instability and potential code execution.
The technical implementation of this vulnerability involves two distinct attack vectors that exploit different command processing mechanisms within the ArGoSoft FTP Server. The first vector targets the SITE ZIP command where attackers can supply excessively long arguments to either the first or second parameter positions, causing memory corruption through buffer overflows. The second vector exploits the SITE COPY command with similarly crafted long argument inputs that trigger the same memory corruption vulnerabilities. Both attack scenarios leverage the server's insufficient input validation mechanisms, where command arguments are directly copied into fixed-size buffers without proper bounds checking. This fundamental flaw in input handling creates opportunities for attackers to overwrite adjacent memory locations, potentially leading to arbitrary code execution or system crashes that result in denial of service conditions.
The operational impact of CVE-2004-2673 extends beyond simple service disruption to encompass potential system compromise and data integrity violations. When exploited successfully, these buffer overflows can cause the FTP server process to crash and restart repeatedly, creating persistent denial of service conditions that affect legitimate users and system availability. More critically, the memory corruption patterns associated with buffer overflows in this implementation could potentially be leveraged to execute arbitrary code with the privileges of the running FTP service, which typically operates with elevated system permissions. This presents a significant risk to network infrastructure, as compromised FTP servers can serve as entry points for broader network infiltration attacks. The vulnerability affects systems where the ArGoSoft FTP Server is deployed, particularly in environments where authentication is required but where the server processes untrusted input from authenticated users.
Mitigation strategies for CVE-2004-2673 should prioritize immediate software updates to versions 1.4.1.6 or later where the buffer overflow vulnerabilities have been addressed through proper input validation and memory management practices. System administrators should implement network segmentation and access controls to limit exposure of FTP services to trusted networks only, reducing the attack surface for remote exploitation attempts. Additionally, monitoring and logging of SITE command usage should be implemented to detect anomalous patterns that might indicate exploitation attempts. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a classic example of improper input validation leading to memory corruption. From an ATT&CK framework perspective, this vulnerability maps to techniques involving command and control communications and privilege escalation, as successful exploitation can provide attackers with persistent access and elevated system privileges. Organizations should also consider implementing intrusion detection systems that can identify patterns associated with buffer overflow exploitation attempts and maintain comprehensive backup and recovery procedures to ensure business continuity in case of successful exploitation.