CVE-2005-3471 in MailScanner
Summary
by MITRE
Directory traversal vulnerability in the ruleset view for MailWatch for MailScanner 1.0.2 allows remote attackers to access arbitrary files.
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Analysis
by VulDB Data Team • 07/29/2017
The directory traversal vulnerability identified in CVE-2005-3471 affects MailWatch for MailScanner version 1.0.2, representing a critical security flaw that enables remote attackers to access arbitrary files on the server. This vulnerability specifically targets the ruleset view functionality within the MailWatch interface, which serves as a management tool for administrators to monitor and configure MailScanner email filtering policies. The flaw arises from insufficient input validation and sanitization within the application's file handling mechanisms, allowing malicious users to manipulate file path parameters and traverse the directory structure beyond intended boundaries.
The technical exploitation of this vulnerability occurs through manipulation of the ruleset view parameters, where attackers can inject directory traversal sequences such as "../" or "..\" to navigate upward through the file system hierarchy. When the application processes these malformed inputs without proper validation, it fails to restrict access to files outside the designated web root or application directories, potentially exposing sensitive configuration files, database credentials, system logs, and other confidential data. This vulnerability falls under CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The attack vector is particularly dangerous because it can be executed remotely without requiring authentication, making it an attractive target for automated exploitation tools and malicious actors seeking to compromise email server infrastructure.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can lead to complete system compromise when attackers gain access to sensitive configuration files or database credentials. MailWatch administrators may unknowingly expose critical system components including database connection strings, encryption keys, and other administrative files that could facilitate further attacks on the underlying email infrastructure. The vulnerability affects the integrity and confidentiality of the entire MailScanner ecosystem, potentially allowing attackers to modify filtering rules, access archived emails, or escalate privileges within the system. According to ATT&CK framework, this vulnerability maps to T1083 (File and Directory Discovery) and T1566 (Phishing), as attackers can use the discovered information to craft more sophisticated social engineering campaigns or establish persistent access through compromised administrative credentials.
Mitigation strategies for this vulnerability require immediate implementation of input validation and sanitization measures within the MailWatch application. Administrators should ensure that all file path parameters are strictly validated against a whitelist of acceptable values, with no directory traversal sequences permitted in user-supplied inputs. The recommended approach includes implementing proper path normalization techniques that resolve relative paths and reject any attempts to access parent directories. Additionally, the application should be configured with minimal required permissions, ensuring that the web server process cannot access sensitive system files or directories beyond the intended application scope. System administrators should also consider implementing web application firewalls and intrusion detection systems to monitor for suspicious directory traversal patterns and prevent exploitation attempts. The vulnerability highlights the critical importance of input validation in web applications and demonstrates how seemingly minor flaws in file handling can result in catastrophic security breaches, emphasizing the need for comprehensive security testing and code review practices throughout the software development lifecycle.