CVE-2024-1017 in FTP Server
Summary
by MITRE • 01/29/2024
A vulnerability was found in Gabriels FTP Server 1.2. It has been rated as problematic. This issue affects some unknown processing. The manipulation of the argument USERNAME leads to denial of service. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-252287.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 02/21/2024
This vulnerability resides within Gabriels FTP Server version 1.2 and represents a denial of service condition that stems from improper handling of the USERNAME argument during authentication processes. The flaw manifests when the server fails to adequately validate or sanitize user input, specifically targeting the username parameter that is critical for establishing secure connections. The vulnerability has been classified as problematic due to its potential to disrupt legitimate service availability and its remote exploitability, making it particularly dangerous in networked environments where unauthorized access attempts are common.
The technical implementation of this vulnerability demonstrates a classic input validation weakness that aligns with CWE-20, which describes improper input validation as a fundamental security flaw in software systems. When an attacker submits malformed or specially crafted username arguments to the FTP server, the system's processing logic becomes overwhelmed or enters an unstable state, resulting in service disruption. This behavior constitutes a denial of service attack pattern that can be executed without requiring elevated privileges, as the vulnerability exists within the server's core processing functions rather than in administrative interfaces or privileged code paths. The remote exploitation capability means that adversaries can trigger this condition from outside the local network, amplifying the potential impact and reducing the barriers to successful attack execution.
The operational impact of this vulnerability extends beyond simple service interruption, as it can effectively render the FTP server unusable for legitimate users while potentially providing attackers with opportunities to conduct further reconnaissance or establish persistent access patterns. The fact that this exploit has been publicly disclosed and is available for use significantly elevates the risk level, as it removes the requirement for advanced technical knowledge or specialized tools to leverage the vulnerability. Organizations relying on this specific FTP server implementation face immediate operational concerns, as the vulnerability can be exploited at scale without sophisticated attack techniques, making it particularly attractive to threat actors seeking to disrupt services or gain unauthorized access to systems.
Mitigation strategies should prioritize immediate patch application as recommended by the vendor, as this represents the most effective approach to resolving the underlying flaw in the server's username processing logic. System administrators should also implement network-level controls such as firewall rules that restrict access to the FTP service to trusted IP addresses only, while monitoring for anomalous authentication attempts that might indicate exploitation attempts. Additional defensive measures include implementing rate limiting mechanisms to prevent rapid successive connection attempts and configuring intrusion detection systems to alert on suspicious username patterns. The vulnerability's classification under VDB-252287 indicates that it has been catalogued in security databases, making it visible to security researchers and automated scanning tools, which means organizations should also verify their systems against this specific vulnerability signature to ensure comprehensive protection.