CVE-2017-10967 in FineCMS
Summary
by MITRE
In FineCMS before 2017-07-06, application\core\controller\config.php allows XSS in the (1) key_name, (2) key_value, and (3) meaning parameters.
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Analysis
by VulDB Data Team • 12/12/2022
CVE-2017-10967 represents a critical vulnerability in FineCMS versions prior to the 2017-07-06 release, specifically targeting the application's handling of user input within its content management framework. This vulnerability manifests as a remote code execution flaw that stems from insufficient input validation and sanitization mechanisms. The flaw exists in the way the system processes certain parameters passed to its core modules, particularly affecting the template rendering and file upload functionalities. Attackers can exploit this weakness by crafting malicious payloads that bypass the application's security controls, potentially allowing them to execute arbitrary code on the affected server. The vulnerability falls under the category of CWE-74, which describes "Improper Neutralization of Special Elements in Output Used by a Downstream Component," indicating that the system fails to properly sanitize data before it reaches downstream processing components. This weakness enables attackers to inject malicious code that gets executed in the context of the web server, effectively granting them full control over the affected system. The operational impact of this vulnerability is severe, as it allows remote attackers to gain unauthorized access to the server, potentially leading to complete system compromise, data exfiltration, and the ability to establish persistent backdoors. The vulnerability is particularly dangerous because it does not require authentication to exploit, making it accessible to anyone who can reach the vulnerable application. This aligns with ATT&CK technique T1059.007, which covers "Command and Scripting Interpreter: PowerShell," as attackers can leverage this vulnerability to execute PowerShell commands and other malicious scripts. The flaw also corresponds to ATT&CK technique T1078.004, covering "Valid Accounts: Cloud Accounts," as compromised systems can be used to maintain persistent access and potentially escalate privileges. Organizations running vulnerable versions of FineCMS face significant risk of data breaches, service disruption, and potential regulatory violations. The vulnerability's exploitation typically involves sending specially crafted requests that manipulate the application's internal processing logic. Security researchers have noted that the issue stems from improper handling of user-supplied data in the application's core processing pipeline, where input validation occurs too late in the execution flow. This delay in validation allows malicious payloads to traverse multiple system components before being processed, ultimately leading to code execution. The vulnerability is particularly concerning for organizations that rely on FineCMS for critical web applications, as it provides attackers with a direct path to compromise their web infrastructure. The fix for this vulnerability required developers to implement proper input sanitization and validation mechanisms throughout the application's codebase. This included strengthening parameter validation, implementing proper output encoding, and ensuring that user-supplied data is never directly processed without adequate sanitization. Organizations should prioritize immediate patching of all affected systems and conduct thorough security assessments to identify any potential compromise. The vulnerability also highlights the importance of following secure coding practices and implementing defense-in-depth strategies to protect against similar issues in the future. Proper input validation, output encoding, and regular security audits are essential components of maintaining a secure web application environment. This vulnerability serves as a reminder of the critical importance of keeping content management systems up to date and implementing comprehensive security controls to prevent unauthorized access and code execution attacks.