CVE-2016-1501 in ownCloud
Summary
by MITRE
ownCloud Server before 8.0.9 and 8.1.x before 8.1.4 allow remote authenticated users to obtain sensitive information via unspecified vectors, which reveals the installation path in the resulting exception messages.
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Analysis
by VulDB Data Team • 04/01/2025
The vulnerability identified as CVE-2016-1501 affects ownCloud Server versions prior to 8.0.9 and 8.1.x versions before 8.1.4, representing a sensitive information disclosure flaw that impacts the security posture of cloud storage deployments. This vulnerability allows remote authenticated attackers to extract installation path information through exception messages generated during system operations, creating potential attack vectors for further exploitation. The issue stems from the application's handling of error conditions where detailed exception messages contain filesystem path information that should remain confidential to prevent attackers from gaining insights into the underlying system architecture.
The technical implementation of this vulnerability demonstrates a classic case of improper error handling and information disclosure practices within the ownCloud server framework. When authenticated users trigger specific error conditions during system operations, the application's exception handling mechanism inadvertently includes the installation path in the resulting error messages. This occurs because the system does not sanitize error outputs to remove sensitive path information that could be leveraged by attackers for reconnaissance purposes. The vulnerability aligns with CWE-209, which specifically addresses "Information Exposure Through an Error Message," and represents a common pattern where applications fail to properly abstract error information from end users while maintaining system security.
The operational impact of CVE-2016-1501 extends beyond simple information disclosure, as the revelation of installation paths provides attackers with critical system architecture knowledge that can facilitate more sophisticated attacks. An attacker who has authenticated access to the system can exploit this vulnerability to gather information about the server's filesystem structure, potentially enabling them to identify other potential attack vectors, locate sensitive files, or plan targeted exploitation attempts. The vulnerability affects the principle of least privilege and can undermine defense-in-depth strategies by providing attackers with information that should remain hidden from authenticated users. This type of information disclosure can be particularly dangerous when combined with other vulnerabilities or when the installation path reveals the presence of other system components or configurations that may be exploitable.
Mitigation strategies for CVE-2016-1501 require immediate patching of affected ownCloud server installations to version 8.0.9 or 8.1.4, which contain the necessary fixes to prevent installation path disclosure in error messages. Organizations should also implement comprehensive error handling procedures that sanitize all error outputs to remove sensitive system information before presentation to users. The remediation process should include reviewing all custom error handling code and ensuring that exception messages do not contain filesystem paths or other sensitive information that could aid attackers in system reconnaissance. Security teams should also conduct regular vulnerability assessments to identify similar information disclosure issues within their ownCloud installations and related applications, as this vulnerability demonstrates the importance of proper error message handling in maintaining system security. The fix for this vulnerability aligns with ATT&CK technique T1211, which covers "Exploitation for Defense Evasion" and emphasizes the importance of preventing information leakage that could enable attackers to bypass security controls.