CVE-2010-2426 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 arbitrary files, determine file size, via "..//" sequences in the xcrc command.
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Analysis
by VulDB Data Team • 04/02/2019
The vulnerability identified as CVE-2010-2426 represents a critical directory traversal flaw within the TitanFTPd component of South River Technologies Titan FTP Server version 8.10.1125 and potentially earlier releases. This security weakness specifically affects the xcrc command implementation, which is used for calculating cyclic redundancy checks on files within the FTP server environment. The flaw enables authenticated remote attackers to exploit improper input validation mechanisms that fail to adequately sanitize path traversal sequences, creating a pathway for unauthorized file access and information disclosure.
The technical exploitation of this vulnerability relies on the manipulation of path traversal sequences using double forward slashes followed by dot-dot components in the xcrc command. This particular implementation flaw allows attackers to bypass normal file access controls and navigate through the file system hierarchy to access files outside the intended directory structure. The vulnerability stems from insufficient input validation and path normalization routines that do not properly handle malformed path sequences, resulting in the server interpreting the crafted input as legitimate file access requests rather than malicious traversal attempts. This weakness directly maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The operational impact of this vulnerability extends beyond simple unauthorized file access to include potential information disclosure and system compromise. An authenticated attacker can leverage this flaw to determine file sizes and read arbitrary files from the server's file system, potentially accessing sensitive configuration files, user data, or system binaries. The ability to determine file sizes provides additional reconnaissance capabilities that could aid in further exploitation attempts. The vulnerability affects the integrity and confidentiality of the FTP server environment, as it allows unauthorized access to files that should remain protected within the server's designated directories. This represents a significant risk to organizations relying on Titan FTP Server for file transfer operations, particularly in environments where sensitive data is stored and accessed through FTP protocols.
Mitigation strategies for CVE-2010-2426 should prioritize immediate patching of affected Titan FTP Server installations to the latest available versions from South River Technologies. Organizations should implement network segmentation and access control measures to limit the exposure of FTP services to trusted networks only. The implementation of proper input validation and path sanitization mechanisms within FTP server applications is essential to prevent similar vulnerabilities from emerging in the future. Security monitoring should include detection of unusual file access patterns and path traversal attempts that could indicate exploitation attempts. Additionally, regular security assessments and penetration testing should be conducted to identify and remediate similar vulnerabilities in other network services and applications. This vulnerability aligns with ATT&CK technique T1083, which covers the discovery of files and directories, and T1071.004, covering application layer protocols, demonstrating the need for comprehensive security controls across multiple attack vectors and phases of the kill chain.