CVE-2012-6651 in Vitamin
Summary
by MITRE
Multiple directory traversal vulnerabilities in the Vitamin plugin before 1.1.0 for WordPress allow remote attackers to access arbitrary files via a .. (dot dot) in the path parameter to (1) add_headers.php or (2) minify.php.
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Analysis
by VulDB Data Team • 03/26/2022
The vulnerability identified as CVE-2012-6651 represents a critical directory traversal flaw within the Vitamin plugin for WordPress systems. This security weakness affects versions prior to 1.1.0 and exposes WordPress installations to unauthorized file access attempts by remote attackers. The vulnerability specifically manifests in two distinct files within the plugin's codebase: add_headers.php and minify.php, both of which accept user-supplied path parameters that are not properly validated or sanitized.
The technical exploitation of this vulnerability relies on the manipulation of directory traversal sequences using the ".." (dot dot) notation within the path parameter. When an attacker crafts a malicious request containing these traversal sequences, the plugin fails to properly validate the input, allowing the application to interpret and process these sequences as legitimate directory navigation commands. This flaw directly violates the principle of input validation and proper path sanitization that should be enforced at all levels of application processing. The vulnerability can be categorized under CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal.
The operational impact of this vulnerability extends beyond simple file access, as it could potentially allow attackers to retrieve sensitive system files, configuration data, or even execute arbitrary code depending on the system's file permissions and the nature of the accessible files. An attacker could leverage this weakness to access WordPress core files, plugin files, theme files, or potentially database configuration files that contain sensitive credentials. This type of vulnerability is particularly dangerous in WordPress environments where plugins often have elevated privileges and access to various system resources. The attack vector aligns with techniques described in the ATT&CK framework under the T1059 category for command and scripting interpreter, as successful exploitation could lead to further system compromise.
The remediation for this vulnerability requires immediate upgrading to Vitamin plugin version 1.1.0 or later, which includes proper input validation and sanitization mechanisms. Additionally, system administrators should implement proper file access controls, ensure that WordPress and plugin files have appropriate permissions, and consider implementing web application firewalls that can detect and block directory traversal attempts. The vulnerability demonstrates the critical importance of proper input validation in web applications and serves as a reminder that even seemingly simple plugins can introduce significant security risks when proper security practices are not followed. Organizations should maintain updated inventories of all installed plugins and regularly audit their WordPress installations for known vulnerabilities, as this type of flaw represents a common attack surface that adversaries frequently target in web application exploitation campaigns.