CVE-2013-2086 in ownCloud
Summary
by MITRE
The configuration loader in ownCloud 5.0.x before 5.0.6 allows remote attackers to obtain CSRF tokens and other sensitive information by reading an unspecified JavaScript file.
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Analysis
by VulDB Data Team • 03/31/2025
The vulnerability identified as CVE-2013-2086 resides within the configuration loader component of ownCloud version 5.0.x prior to 5.0.6, representing a critical security flaw that exposes sensitive data to remote attackers. This issue specifically affects the web-based file synchronization and sharing platform that was widely adopted by organizations seeking cloud storage solutions. The vulnerability stems from improper handling of sensitive information within the application's JavaScript files, which are served to users' browsers during normal operation. The flaw allows malicious actors to access configuration data through a simple file read operation against an unspecified JavaScript file, potentially compromising the security posture of affected systems.
The technical implementation of this vulnerability involves the configuration loader module failing to properly sanitize or restrict access to sensitive data that should remain protected within the application's internal processing layers. When the web server processes requests for configuration resources, it inadvertently exposes CSRF tokens and other confidential information through JavaScript files that are accessible to any remote user. This represents a classic case of information disclosure where the application's security boundaries are improperly enforced, allowing unauthorized data retrieval. The vulnerability is categorized under CWE-200, which addresses "Information Exposure" and specifically relates to situations where sensitive information is exposed to unauthorized parties through improper access controls or data handling mechanisms.
The operational impact of CVE-2013-2086 extends beyond simple data exposure, as CSRF tokens represent critical security elements that protect against cross-site request forgery attacks. When these tokens are exposed to remote attackers, they can potentially leverage this information to perform unauthorized actions on behalf of legitimate users within the ownCloud environment. The vulnerability creates a pathway for attackers to escalate privileges or execute malicious operations that would normally require legitimate authentication. This exposure particularly affects organizations using ownCloud as their primary cloud storage solution, where the compromise of CSRF tokens could lead to complete account takeovers or unauthorized data manipulation. The attack vector is particularly concerning as it requires no special privileges or complex exploitation techniques, making it accessible to even less sophisticated threat actors.
Organizations affected by this vulnerability should immediately implement mitigation strategies including updating to ownCloud version 5.0.6 or later, which contains the necessary patches to address the information disclosure issue. The remediation process involves not only upgrading the software but also reviewing access controls and ensuring that JavaScript files containing sensitive information are properly secured. Network administrators should implement additional monitoring to detect unusual access patterns to configuration files and establish proper firewall rules to restrict access to sensitive endpoints. The vulnerability demonstrates the importance of proper input validation and output sanitization in web applications, aligning with ATT&CK technique T1566 which covers credential access through various means including information discovery. Security teams should also conduct comprehensive reviews of their web application security configurations to identify similar vulnerabilities in other components of their infrastructure, particularly focusing on how sensitive data is handled during application runtime.