CVE-2007-3172 in Uebimiau
Summary
by MITRE
Directory traversal vulnerability in demo/pop3/error.php in Uebimiau Webmail allows remote attackers to determine the existence of arbitrary directories via an absolute pathname and .. (dot dot) in the selected_theme parameter.
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Analysis
by VulDB Data Team • 07/20/2021
The vulnerability identified as CVE-2007-3172 represents a directory traversal flaw within the Uebimiau Webmail application's demo/pop3/error.php component. This weakness enables remote attackers to exploit the system by manipulating the selected_theme parameter through absolute pathnames combined with directory traversal sequences. The vulnerability stems from inadequate input validation and sanitization mechanisms that fail to properly restrict user-supplied data before processing it within the application's directory structure. Such flaws typically arise when applications directly incorporate user-controllable input into file system operations without proper authorization checks or path normalization procedures.
The technical exploitation of this vulnerability occurs through the manipulation of the selected_theme parameter which accepts absolute pathnames and directory traversal sequences using the .. (dot dot) notation. When an attacker crafts a malicious payload containing these traversal sequences, the application processes the input without proper validation, allowing it to navigate the file system beyond its intended boundaries. This enables unauthorized access to arbitrary directories on the server, potentially exposing sensitive system files, configuration data, or other restricted resources. The vulnerability specifically affects the error handling mechanism within the POP3 demonstration functionality, making it particularly dangerous as it can be triggered through normal application usage patterns.
The operational impact of CVE-2007-3172 extends beyond simple directory enumeration, as it provides attackers with the capability to perform reconnaissance activities and potentially escalate privileges within the affected system. Attackers can use this vulnerability to map the server's file structure, identify sensitive files, and potentially gain access to system configuration information or other restricted resources. This type of vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal. The attack pattern demonstrates characteristics consistent with techniques described in the ATT&CK framework under the T1083 discovery technique, where adversaries attempt to gather information about the system environment.
Mitigation strategies for this vulnerability require immediate implementation of proper input validation and sanitization procedures within the application's parameter handling logic. The most effective approach involves implementing strict validation of the selected_theme parameter to reject any input containing directory traversal sequences or absolute path references. Organizations should also consider implementing proper path normalization and canonicalization functions to ensure that all file system operations occur within designated safe directories. Additionally, the principle of least privilege should be enforced by restricting the web application's file system access to only necessary directories and implementing proper access controls. Regular security audits and input validation testing should be conducted to prevent similar vulnerabilities from being introduced in future code releases, while also ensuring that existing applications maintain robust defenses against path traversal attacks.