CVE-2009-4896 in mlmmj
Summary
by MITRE
Multiple directory traversal vulnerabilities in the mlmmj-php-admin web interface for Mailing List Managing Made Joyful (mlmmj) 1.2.15 through 1.2.17 allow remote authenticated users to overwrite, create, or delete arbitrary files, or determine the existence of arbitrary directories, via a .. (dot dot) in a list name in a (1) edit or (2) save action.
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Analysis
by VulDB Data Team • 09/21/2021
The CVE-2009-4896 vulnerability represents a critical directory traversal flaw in the mlmmj-php-admin web interface component of the Mailing List Managing Made Joyful (mlmmj) software suite. This vulnerability affects versions 1.2.15 through 1.2.17 and stems from inadequate input validation within the web administration interface. The flaw specifically manifests when processing list names containing directory traversal sequences, allowing authenticated attackers to manipulate file system operations through crafted requests. The vulnerability operates at the application layer and leverages the fundamental weakness of insufficient sanitization of user-supplied input that controls file system access paths.
The technical implementation of this vulnerability exploits the absence of proper path validation and sanitization mechanisms within the mlmmj-php-admin interface. When users perform edit or save actions on mailing list configurations, the system fails to properly validate or sanitize the list name parameter, which can contain sequences such as "../" that traverse directory structures. This allows attackers to manipulate the file system operations to target arbitrary files or directories outside the intended scope of the application's file handling capabilities. The vulnerability specifically impacts the web interface's ability to properly resolve and restrict file system paths, creating a direct path traversal condition that can be exploited for various malicious activities including arbitrary file operations.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass full system compromise capabilities. An authenticated attacker can leverage this vulnerability to overwrite existing files with malicious content, create new files in sensitive system directories, delete critical files, or enumerate the existence of arbitrary directories within the system. This creates a significant risk for organizations relying on mlmmj for email list management, as successful exploitation could lead to complete system compromise, data loss, or unauthorized access to sensitive information. The vulnerability essentially provides an attacker with a foothold to escalate privileges and potentially gain broader system access through the compromised mail list management interface.
Mitigation strategies for CVE-2009-4896 should focus on immediate patching of affected mlmmj versions to remediate the directory traversal vulnerability. Organizations should implement proper input validation and sanitization measures within the web interface to prevent directory traversal sequences from being processed as legitimate file system operations. The implementation of secure coding practices including path normalization, absolute path resolution, and strict validation of user input parameters can prevent exploitation of similar vulnerabilities. Additionally, network segmentation and access controls should be enforced to limit the scope of potential exploitation, ensuring that only authorized personnel have access to the vulnerable web administration interface. This vulnerability aligns with CWE-22 Directory Traversal and can be mapped to ATT&CK technique T1059 Command and Scripting Interpreter for potential post-exploitation activities. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts targeting this specific vulnerability pattern.