CVE-2014-9047 in ownCloud
Summary
by MITRE
Multiple unspecified vulnerabilities in the preview system in ownCloud 6.x before 6.0.6 and 7.x before 7.0.3 allow remote attackers to read arbitrary files via unknown vectors.
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Analysis
by VulDB Data Team • 04/01/2025
The vulnerability identified as CVE-2014-9047 represents a critical security flaw within the preview system of ownCloud versions 6.x prior to 6.0.6 and 7.x prior to 7.0.3. This issue resides in the file preview functionality that allows users to generate thumbnails and previews of various file types directly within the web interface. The vulnerability enables remote attackers to exploit unspecified vectors within this preview system to read arbitrary files from the server, potentially exposing sensitive data and compromising the integrity of the file sharing platform. The preview system in ownCloud is designed to provide users with convenient access to file contents without downloading them, but this feature becomes a security risk when improper access controls are implemented.
The technical nature of this vulnerability stems from inadequate input validation and access control mechanisms within the preview system's file handling processes. Attackers can manipulate the preview functionality to bypass normal file access restrictions and retrieve files that should otherwise be protected or restricted. This type of vulnerability typically falls under the category of insecure direct object reference issues, where the application fails to properly validate user input before accessing file system resources. The unspecified vectors suggest that the flaw may involve multiple attack paths including parameter manipulation, path traversal techniques, or improper validation of file paths within the preview generation process. Such vulnerabilities are commonly classified under CWE-22 (Path Traversal) or CWE-284 (Improper Access Control) depending on the specific implementation details.
The operational impact of CVE-2014-9047 is significant for organizations relying on ownCloud for file sharing and collaboration. Remote attackers can potentially access sensitive documents, personal files, configuration data, and other protected resources stored on the server. This vulnerability undermines the fundamental security model of the platform by allowing unauthorized access to file system resources through the preview system, which is typically considered a benign feature. The attack vector does not require authentication for exploitation, making it particularly dangerous as it can be leveraged by anyone with access to the ownCloud instance. Organizations may face regulatory compliance issues, data breaches, and potential legal consequences if sensitive information is accessed through this vulnerability. The impact extends beyond simple data exposure to include potential system compromise and escalation of privileges within the file sharing environment.
Mitigation strategies for CVE-2014-9047 focus primarily on updating to patched versions of ownCloud where the vulnerability has been addressed through proper input validation and access control enforcement. System administrators should immediately upgrade to ownCloud 6.0.6 or 7.0.3, which contain the necessary security fixes for the preview system. Additionally, implementing network-level firewalls and access controls can help limit exposure to the vulnerable preview functionality. Organizations should review their file access policies and ensure that proper authentication and authorization mechanisms are in place for all file system operations. The implementation of web application firewalls can provide additional protection by monitoring and filtering malicious requests targeting the preview system. Security monitoring should be enhanced to detect unusual file access patterns that might indicate exploitation attempts. Regular security audits and penetration testing of file sharing systems are recommended to identify similar vulnerabilities in other components of the platform. This vulnerability highlights the importance of secure coding practices and proper input validation, particularly in features that interact with file system resources, aligning with ATT&CK technique T1213 (Data from Information Repositories) and emphasizing the need for robust access control mechanisms as outlined in NIST SP 800-53 security controls.