CVE-2018-13294 in Application Service
Summary
by MITRE
Information exposure vulnerability in SYNO.Personal.Profile in Synology Application Service before 1.5.4-0320 allows remote authenticated users to obtain sensitive system information via the uid parameter.
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Analysis
by VulDB Data Team • 08/21/2023
The vulnerability identified as CVE-2018-13294 represents a critical information exposure flaw within Synology's Application Service ecosystem, specifically affecting the SYNO.Personal.Profile component. This issue manifests as an insufficient authorization check that permits remote authenticated users to exploit a parameter manipulation attack through the uid parameter. The vulnerability exists in versions prior to 1.5.4-0320 of the Synology Application Service, creating a persistent security gap that could be exploited by malicious actors with legitimate credentials. The flaw demonstrates a fundamental failure in access control mechanisms, where the system fails to properly validate user permissions when processing requests containing the uid parameter, thereby allowing unauthorized information disclosure.
The technical implementation of this vulnerability stems from inadequate input validation and access control enforcement within the personal profile handling module of Synology's application service. When a remote authenticated user submits a request containing a crafted uid parameter, the system processes this input without sufficient verification of the requesting user's authorization level. This weakness creates a pathway for attackers to enumerate system information by manipulating the uid parameter to access profiles and data belonging to other users within the system. The vulnerability operates at the application layer and leverages the existing authentication mechanism to escalate privileges through parameter manipulation rather than bypassing authentication entirely. According to CWE classification, this represents a CWE-200: Information Exposure vulnerability, where the system inadvertently reveals sensitive information to unauthorized parties through improper access control enforcement.
The operational impact of this vulnerability extends beyond simple information disclosure, as it enables attackers to potentially gather comprehensive user profile data, system configurations, and other sensitive information that could facilitate further attacks. Remote authenticated users can leverage this flaw to perform reconnaissance activities, identify user accounts, and potentially discover system architecture details that could be used in subsequent exploitation attempts. The vulnerability's remote nature means that attackers do not require physical access to the system or local network presence to exploit it, making it particularly dangerous in enterprise environments where Synology devices are commonly deployed. This information exposure could lead to privilege escalation opportunities, credential harvesting, or serve as a foundation for more sophisticated attacks within the network infrastructure.
Organizations utilizing affected Synology Application Service versions should prioritize immediate remediation through the installation of the patched version 1.5.4-0320 or later. The mitigation strategy should include comprehensive network monitoring to detect anomalous parameter usage patterns and implementation of additional access control measures beyond the default configuration. Security teams should conduct thorough vulnerability assessments of their Synology deployments to identify all instances of the vulnerable software and ensure proper patch management protocols are in place. The remediation process should also include reviewing system logs for evidence of exploitation attempts and implementing network segmentation to limit the potential impact of successful attacks. This vulnerability highlights the importance of maintaining up-to-date security patches and demonstrates how seemingly minor access control flaws can create significant security risks in enterprise environments, aligning with ATT&CK technique T1087.001 for Account Discovery and T1005 for Data from Local System.