CVE-2007-6582 in mBlog
Summary
by MITRE
Directory traversal vulnerability in index.php in mBlog 1.2 allows remote attackers to read arbitrary files via a .. (dot dot) in the page parameter in a page mode action.
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Analysis
by VulDB Data Team • 10/13/2024
The vulnerability described in CVE-2007-6582 represents a classic directory traversal flaw that exists within the mBlog 1.2 content management system. This weakness allows remote attackers to access files outside the intended directory structure by manipulating the page parameter through the use of directory traversal sequences such as .. or %2e%2e. The vulnerability specifically affects the index.php script when operating in page mode action, making it a targeted issue that could be exploited by malicious actors without requiring authentication or privileged access. This type of vulnerability falls under the category of CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The technical implementation of this vulnerability occurs when the application fails to properly sanitize user input before using it to construct file paths for retrieval operations. In mBlog 1.2, when a user requests a page in page mode, the application accepts the page parameter directly without validating or filtering the input to prevent directory traversal sequences. This allows an attacker to craft malicious requests that include sequences like ../ or %2e%2e to navigate up the directory tree and access files that should normally be restricted. The attack vector is particularly dangerous because it can potentially allow access to sensitive system files, configuration files, or even source code that could reveal critical information about the application's structure and implementation details.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the ability to access arbitrary files on the server hosting the mBlog application. This could potentially lead to the exposure of database configuration files containing credentials, application source code revealing implementation flaws, or system configuration files that could aid in further exploitation attempts. The vulnerability is particularly concerning in environments where the web application has access to sensitive data or system resources, as it could enable attackers to escalate their privileges or gain deeper access to the underlying infrastructure. This type of vulnerability is categorized under the ATT&CK framework as T1083 (File and Directory Discovery) and can be leveraged as part of broader attack chains to establish persistence or conduct reconnaissance activities.
Mitigation strategies for CVE-2007-6582 should focus on implementing proper input validation and sanitization mechanisms within the application code. The most effective approach involves implementing strict validation of all user-supplied input, particularly parameters used in file operations, to prevent directory traversal sequences from being processed. This can be achieved through the implementation of allowlists that only permit expected values or through the use of robust input filtering that removes or encodes potentially dangerous sequences. Additionally, the application should employ proper access controls and privilege separation, ensuring that the web application runs with minimal necessary permissions and cannot access files outside of its designated directory structure. Organizations should also consider implementing web application firewalls that can detect and block known directory traversal patterns, as well as conducting regular security assessments to identify similar vulnerabilities in other components of their web infrastructure. The remediation of this vulnerability requires immediate attention as it represents a fundamental security flaw that can be exploited by any remote attacker with basic knowledge of web application exploitation techniques.