CVE-2008-2091 in Kubelance
Summary
by MITRE
Directory traversal vulnerability in ipn.php in KubeLabs Kubelance 1.6.4 allows remote attackers to include and execute arbitrary local files via the i parameter.
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Analysis
by VulDB Data Team • 10/21/2024
The directory traversal vulnerability identified in CVE-2008-2091 affects KubeLabs Kubelance version 1.6.4, specifically within the ipn.php script. This vulnerability represents a critical security flaw that enables remote attackers to manipulate file inclusion mechanisms and execute arbitrary local code on the affected system. The vulnerability stems from insufficient input validation in the i parameter handling, which allows attackers to craft malicious requests that can traverse directory structures and access unintended files.
The technical implementation of this vulnerability resides in the improper sanitization of user-supplied input within the ipn.php file. When the application processes the i parameter without adequate validation or filtering, it becomes susceptible to directory traversal attacks where attackers can manipulate the parameter to access files outside the intended directory scope. This flaw directly maps to CWE-22, which defines improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal vulnerabilities. The vulnerability allows attackers to include local files that should remain protected, potentially leading to complete system compromise through code execution.
From an operational impact perspective, this vulnerability presents significant risks to organizations running affected Kubelance installations. Remote attackers can exploit this weakness to access sensitive system files, configuration data, and potentially execute malicious code with the privileges of the web application. The attack surface expands considerably as attackers can leverage this vulnerability to escalate privileges, access database credentials, or even establish persistent backdoors. This vulnerability aligns with ATT&CK technique T1566.001, which covers the use of malicious file inclusion to execute code, and represents a common attack vector that has been consistently exploited in web application security breaches.
Mitigation strategies for this vulnerability should include immediate patching of the affected Kubelance version to the latest available release that addresses the directory traversal flaw. Organizations should implement proper input validation and sanitization mechanisms, particularly for all parameters that influence file operations. The implementation of a whitelist-based approach for file inclusion, where only pre-approved files can be accessed, provides an effective defense against such attacks. Additionally, restricting web application permissions to minimize file system access and implementing proper access controls can reduce the impact of successful exploitation attempts. Security monitoring should include detection of suspicious file access patterns and directory traversal attempts, while network segmentation can limit the potential damage from successful exploitation of this vulnerability.