CVE-2012-4347 in Messaging Gateway
Summary
by MITRE
Multiple directory traversal vulnerabilities in the management console in Symantec Messaging Gateway (SMG) 9.5.x allow remote authenticated users to read arbitrary files via a .. (dot dot) in the (1) logFile parameter in a logs action to brightmail/export or (2) localBackupFileSelection parameter in an APPLIANCE restoreSource action to brightmail/admin/restore/download.do.
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Analysis
by VulDB Data Team • 09/01/2024
The CVE-2012-4347 vulnerability represents a critical directory traversal flaw in Symantec Messaging Gateway version 9.5.x management console, specifically affecting the brightmail/export and brightmail/admin/restore/download.do endpoints. This vulnerability stems from inadequate input validation within the web application's file handling mechanisms, allowing authenticated attackers to manipulate file path parameters and access arbitrary files on the underlying system. The flaw exists in the way the application processes user-supplied input for logFile and localBackupFileSelection parameters, failing to properly sanitize or validate the presence of directory traversal sequences such as .. characters.
The technical implementation of this vulnerability leverages the fundamental weakness in path normalization and file access controls within the Symantec Messaging Gateway's administrative interface. When an authenticated user submits requests containing .. sequences in the specified parameters, the application fails to properly resolve the intended file paths, instead allowing the traversal to navigate outside the intended directory boundaries. This creates a path traversal condition that enables attackers to access files outside the application's intended scope, potentially exposing sensitive system information, configuration files, or backup data. The vulnerability specifically targets the management console's file handling functions, where the application processes user requests for log file exports and backup file selections without adequate sanitization of the input parameters.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the ability to access potentially sensitive data that could aid in further exploitation attempts. An authenticated attacker could leverage this vulnerability to access system logs, configuration files, backup data, or other sensitive information that might contain credentials, system details, or operational data that could be used for privilege escalation or additional attacks. The vulnerability affects the entire Symantec Messaging Gateway 9.5.x product line, creating a widespread risk for organizations using this email security appliance. The authentication requirement does not significantly mitigate the risk since gaining access to legitimate administrative credentials is often achievable through various social engineering, credential reuse, or other attack vectors.
Organizations affected by this vulnerability should implement immediate mitigations including applying the vendor-provided security patches, implementing network segmentation to limit access to the management console, and enforcing strict access controls and monitoring of administrative activities. The vulnerability aligns with CWE-22 Directory Traversal and maps to attack techniques in the MITRE ATT&CK framework under T1059 Command and Scripting Interpreter and T1083 File and Directory Discovery, representing a classic path traversal attack that demonstrates the importance of proper input validation and secure coding practices. Additional defensive measures should include implementing web application firewalls, conducting regular security assessments, and establishing monitoring protocols to detect unauthorized access attempts to administrative interfaces. The vulnerability underscores the critical importance of input validation in web applications and the potential consequences of inadequate security controls in management interfaces that handle file operations.