CVE-2005-0798 in Mini FTP Server
Summary
by MITRE
Novell iChain Mini FTP Server 2.3, and possibly earlier versions, does not limit the number of incorrect logins, which makes it easier for remote attackers to conduct brute force login attacks.
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Analysis
by VulDB Data Team • 07/21/2017
The vulnerability identified as CVE-2005-0798 affects Novell iChain Mini FTP Server version 2.3 and potentially earlier releases, presenting a significant security weakness that undermines authentication mechanisms. This flaw represents a critical design oversight in the server's access control implementation, where the system fails to enforce any form of login attempt limiting or account lockout functionality. The absence of such protective measures creates an environment where malicious actors can systematically attempt numerous password guesses without encountering any barriers or rate limiting mechanisms.
From a technical perspective, the vulnerability stems from the server's lack of built-in brute force protection mechanisms, which is classified under CWE-307 - Improper Restriction of Excessive Authentication Attempts. The server operates without implementing any form of account lockout policy, login attempt counter, or temporary lockout functionality that would normally be expected in secure authentication systems. This absence allows attackers to conduct unlimited brute force attacks against user accounts, making credential guessing attacks extremely effective and efficient.
The operational impact of this vulnerability is substantial, as it enables remote attackers to systematically compromise user accounts through automated password guessing techniques. Attackers can leverage tools to rapidly iterate through common username and password combinations, potentially gaining unauthorized access to sensitive data, system resources, or administrative functions. The vulnerability particularly affects environments where FTP services are exposed to the internet or untrusted networks, as these configurations provide direct attack vectors without additional network-level protections.
Security professionals should recognize this issue as a fundamental flaw in authentication security that aligns with ATT&CK technique T1110 - Brute Force, specifically targeting credential access through automated guessing methods. The vulnerability creates a persistent risk that can be exploited without requiring sophisticated attack techniques or special privileges, making it particularly dangerous for organizations relying on the affected FTP server implementation.
Mitigation strategies should include immediate implementation of external protections such as firewall rules to restrict access to the FTP service, deployment of network-based intrusion detection systems to monitor for suspicious login patterns, and consideration of alternative authentication mechanisms. Organizations should also evaluate the necessity of maintaining the affected FTP service and consider migrating to more secure protocols or implementations that provide proper authentication limiting features. Additionally, implementing account lockout policies at the network level or through proxy configurations can provide temporary protection while more permanent solutions are implemented. The vulnerability underscores the critical importance of proper authentication design and the necessity of implementing comprehensive access control measures to prevent unauthorized system access through credential-based attacks.