CVE-2005-4553 in Golden FTP Server
Summary
by MITRE
Buffer overflow in Golden FTP Server 1.92 allows remote attackers to execute arbitrary code via a long APPE command. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 06/28/2025
The vulnerability identified as CVE-2005-4553 represents a critical buffer overflow flaw within Golden FTP Server version 1.92 that exposes remote attackers to potential code execution capabilities. This vulnerability specifically manifests when processing the APPE command, which is used to append data to files on the FTP server. The buffer overflow occurs due to inadequate input validation and bounds checking within the server's handling of the APPE command, allowing malicious actors to craft specially formatted commands that exceed the allocated buffer space. Such buffer overflows fall under the common weakness enumeration CWE-121, which classifies them as stack-based buffer overflow conditions where insufficient bounds checking permits the overwriting of adjacent memory locations. The vulnerability operates at the application layer of the network stack, making it particularly dangerous as it requires no authentication to exploit, enabling attackers to remotely execute arbitrary code with the privileges of the FTP server process.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete system compromise and potential lateral movement within network environments. When an attacker successfully exploits this buffer overflow, they can overwrite critical memory segments including return addresses, function pointers, or other control data structures that govern program execution flow. This allows for the execution of malicious code in the context of the FTP server process, potentially leading to privilege escalation if the server runs with elevated permissions. The attack vector leverages the FTP protocol's inherent trust model where legitimate users expect to communicate with the server using standard commands, making the exploitation more subtle and harder to detect. According to the attack technique framework, this vulnerability aligns with ATT&CK technique T1210, which describes exploitation of remote services for privilege escalation and code execution, and T1072, which covers the use of remote services to establish persistence and maintain access.
Mitigation strategies for CVE-2005-4553 require immediate attention through software updates and network security measures to prevent exploitation. The most effective immediate solution involves upgrading to a patched version of Golden FTP Server that implements proper input validation and bounds checking for all FTP commands including APPE. Organizations should also implement network segmentation and access controls to limit exposure of FTP services to untrusted networks, utilizing firewalls to restrict access to FTP ports and implementing network intrusion detection systems to monitor for suspicious APPE command patterns. Additionally, security administrators should consider disabling unnecessary FTP commands and implementing input sanitization measures that validate command length and content before processing. The vulnerability demonstrates the importance of defensive programming practices and input validation as outlined in secure coding standards, where proper bounds checking and memory management techniques could prevent such exploitable conditions. Organizations should also maintain comprehensive monitoring and logging of FTP server activities to detect anomalous behavior that might indicate exploitation attempts, particularly focusing on unusual command sequences and memory access patterns that could suggest buffer overflow exploitation.