CVE-2005-1034 in SurgeFTP
Summary
by MITRE
SurgeFTP 2.2m1 allows remote attackers to cause a denial of service (application hang) via the LEAK command.
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Analysis
by VulDB Data Team • 05/31/2019
The vulnerability identified as CVE-2005-1034 affects SurgeFTP version 2.2m1, a file transfer protocol server implementation that was widely used in enterprise environments during the mid-2000s. This particular flaw represents a classic denial of service condition that can be exploited by remote attackers without requiring authentication or specialized privileges. The vulnerability specifically manifests through the LEAK command, which is not a standard ftp command but appears to be a proprietary extension or custom implementation within the SurgeFTP software. The LEAK command functionality likely serves some diagnostic or monitoring purpose within the application's internal architecture, making it an attractive target for attackers seeking to disrupt service availability.
The technical exploitation of this vulnerability occurs when a remote attacker sends a specially crafted LEAK command to the affected SurgeFTP server. This particular command triggers an application hang condition that causes the ftp service to become unresponsive and unable to process additional requests. The flaw demonstrates poor input validation and error handling within the command processing logic of the ftp server implementation. When the LEAK command is received, the application fails to properly validate the command parameters or handle malformed input, leading to a state where the process becomes stuck in an infinite loop or deadlock condition. This behavior aligns with common software vulnerabilities categorized under CWE-248, which addresses "Uncaught Exception" conditions in software applications.
The operational impact of this vulnerability extends beyond simple service disruption to potentially affect business continuity and operational security. Organizations relying on SurgeFTP for file transfers and data management could experience complete service outages when this vulnerability is exploited, leading to productivity losses and potential data access issues. The remote nature of the attack means that adversaries can exploit this weakness from anywhere on the internet without requiring physical access or network proximity to the affected systems. This vulnerability particularly affects organizations that have not implemented proper network segmentation or firewall rules to restrict ftp service access, making them more susceptible to exploitation. The attack vector follows typical patterns associated with the attack technique T1499.004 from the MITRE ATT&CK framework, which covers "Endpoint Denial of Service" attacks targeting application-level services.
Mitigation strategies for this vulnerability should include immediate patching of the affected SurgeFTP installation to the latest available version that addresses this specific flaw. Organizations should also implement network-level controls such as firewall rules that restrict access to the ftp service to only trusted networks and IP addresses. Additionally, monitoring systems should be configured to detect unusual patterns of ftp command usage that might indicate exploitation attempts. The vulnerability highlights the importance of proper input validation and error handling in network services, which can be addressed through secure coding practices and regular security assessments of ftp server implementations. Organizations should also consider implementing intrusion detection systems that can identify and alert on suspicious ftp command sequences that could indicate attempts to exploit similar vulnerabilities. The remediation process should include comprehensive testing of patched environments to ensure that the vulnerability is fully resolved without introducing regressions in service functionality.