CVE-2010-2425 in Titan FTP Server
Summary
by MITRE
Directory traversal vulnerability in TitanFTPd in South River Technologies Titan FTP Server 8.10.1125, and probably earlier versions, allows remote authenticated users to read or delete arbitrary files via "..//" sequences in a COMB command.
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Analysis
by VulDB Data Team • 04/02/2019
The directory traversal vulnerability identified as CVE-2010-2425 affects the TitanFTPd component of South River Technologies Titan FTP Server version 8.10.1125 and potentially earlier releases. This vulnerability represents a critical security flaw that undermines the integrity of file access controls within the FTP server implementation. The vulnerability specifically manifests in the COMB command processing functionality, where the server fails to properly validate and sanitize input sequences containing directory traversal patterns. The flaw allows authenticated remote attackers to exploit the system's file handling mechanisms by crafting malicious input strings that contain "..//" sequences, which should normally be rejected or properly resolved by the server's file system access layer.
The technical exploitation of this vulnerability stems from improper input validation within the FTP server's command processing pipeline. When the COMB command receives input containing "..//" sequences, the server does not adequately sanitize these patterns before attempting file system operations. This failure in input validation creates an opportunity for attackers to manipulate the file system path resolution logic and gain unauthorized access to files outside the intended directory boundaries. The vulnerability directly relates to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal. The attack vector requires authentication, meaning that an attacker must first establish valid credentials to the FTP server before attempting to exploit this weakness, though the privilege escalation potential remains significant once the vulnerability is successfully leveraged.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it provides attackers with the capability to both read sensitive files and delete critical system components. This dual functionality makes the vulnerability particularly dangerous from a security perspective, as it enables not only data exfiltration but also potential system disruption and destruction. The affected Titan FTP Server version 8.10.1125 represents a specific target for exploitation, though the vulnerability likely exists in earlier versions of the software due to the nature of the input validation flaw. The implications for organizations using this FTP server include potential exposure of confidential data, system integrity compromise, and possible regulatory violations depending on the nature of files accessible through this vulnerability. From an attacker's perspective, this vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation through legitimate credentials, as the attack requires authentication but then leverages the system's trust in authenticated users to access unauthorized resources.
Mitigation strategies for this vulnerability should focus on immediate software updates and patches provided by South River Technologies, as the vendor would have released a fix addressing the input validation flaw in the COMB command processing. Organizations should also implement network segmentation and access control measures to limit exposure of FTP services to only necessary users and systems. Additional protective measures include implementing proper input validation at multiple layers of the application stack, monitoring FTP command logs for suspicious "..//" patterns, and establishing robust file system access controls that limit the impact of potential traversal attacks. Security teams should also consider implementing intrusion detection systems that can identify and alert on anomalous FTP command sequences that may indicate exploitation attempts. The vulnerability demonstrates the importance of comprehensive input validation and the principle of least privilege in secure system design, as proper validation of user-supplied data could have prevented the traversal attack from succeeding.