CVE-2014-3836 in ownCloud
Summary
by MITRE
Multiple cross-site request forgery (CSRF) vulnerabilities in ownCloud Server before 6.0.3 allow remote attackers to hijack the authentication of users for requests that (1) conduct cross-site scripting (XSS) attacks, (2) modify files, or (3) rename files via unspecified vectors.
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Analysis
by VulDB Data Team • 03/31/2025
The CVE-2014-3836 vulnerability represents a critical cross-site request forgery flaw affecting ownCloud Server versions prior to 6.0.3, fundamentally compromising user authentication security. This vulnerability operates as a CSRF attack vector that enables remote threat actors to manipulate authenticated sessions without requiring user credentials, creating a significant risk for cloud storage environments where user data integrity and access control are paramount. The flaw specifically affects the server-side authentication mechanisms that should verify request origins and user intent, but instead allows malicious actors to forge requests that appear legitimate to the target system.
The technical implementation of this vulnerability stems from inadequate validation of request authenticity within the ownCloud server framework, particularly in how it handles user sessions and request processing. Attackers can exploit this weakness by crafting malicious requests that leverage a victim's existing authenticated session, effectively bypassing normal authentication checks. The vulnerability manifests across multiple attack vectors including XSS exploitation, file modification operations, and file renaming activities, indicating a systemic flaw in the server's security model rather than isolated component weaknesses. This broad scope suggests that the CSRF protection mechanisms are fundamentally flawed at the architectural level, affecting core server functionality and user data management capabilities.
The operational impact of CVE-2014-3836 extends beyond simple unauthorized access, as it enables attackers to perform sophisticated attacks that can compromise entire user data repositories. When combined with XSS capabilities, threat actors can execute malicious scripts within user contexts, potentially leading to complete account takeover and data exfiltration. The ability to modify or rename files creates additional risks for data integrity, allowing attackers to corrupt or destroy user information while maintaining plausible deniability through legitimate-looking requests. This vulnerability directly violates security principles outlined in CWE-352, which specifically addresses cross-site request forgery weaknesses in web applications, and aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments, demonstrating how CSRF vulnerabilities can serve as entry points for broader compromise.
Organizations using vulnerable ownCloud versions face significant exposure risks including unauthorized data access, content manipulation, and potential lateral movement within their cloud infrastructure. The vulnerability's persistence across multiple attack vectors means that a single exploitation attempt can yield multiple types of damage, amplifying the overall impact. Mitigation strategies must include immediate version upgrades to 6.0.3 or later, implementation of proper CSRF token validation mechanisms, and enhanced session management protocols. Security teams should also consider deploying web application firewalls to detect and block suspicious request patterns, while establishing monitoring procedures to identify unauthorized file modifications or access attempts that may indicate successful exploitation. The vulnerability underscores the importance of comprehensive security testing and regular patch management in cloud environments where user authentication and data integrity are critical security requirements.