CVE-2017-16769 in Photo Station
Summary
by MITRE
Exposure of private information vulnerability in Photo Viewer in Synology Photo Station 6.8.1-3458 allows remote attackers to obtain metadata from password-protected photographs via the map viewer mode.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 02/08/2023
The vulnerability identified as CVE-2017-16769 represents a critical information disclosure flaw within Synology Photo Station's Photo Viewer component. This issue affects version 6.8.1-3458 and demonstrates a significant weakness in the application's access control mechanisms. The vulnerability specifically manifests when users navigate to the map viewer mode, where the system fails to properly enforce authentication checks for password-protected photographs. This creates an exploitable condition where remote attackers can bypass authentication mechanisms and access metadata from protected images without proper authorization. The flaw exists at the application layer and leverages the map viewer functionality as an attack vector, making it particularly concerning given the sensitive nature of photograph metadata.
The technical root cause of this vulnerability stems from inadequate input validation and authentication enforcement within the Photo Viewer module. When the map viewer mode is accessed, the system does not properly verify whether the requesting user has valid credentials for the specific photograph being accessed. This represents a classic case of insufficient authorization checks and weak access control implementation. The vulnerability aligns with CWE-285, which addresses insufficient authorization issues, and more specifically with CWE-352, covering cross-site request forgery conditions where authentication bypass occurs. The flaw operates by exploiting the map viewer's metadata retrieval mechanism, which should normally be restricted to authorized users but instead provides access to metadata from password-protected images.
The operational impact of this vulnerability extends beyond simple information disclosure, as photograph metadata often contains sensitive location data, device information, timestamps, and other personally identifiable information. Attackers can exploit this vulnerability to gather intelligence about users' locations, travel patterns, and personal activities through the metadata embedded in photographs. This creates significant privacy concerns and potential security risks for individuals who store sensitive or private photographs within the Photo Station environment. The vulnerability affects both individual users and organizations that rely on Synology Photo Station for photo management, potentially exposing confidential information that could be used for social engineering, location-based attacks, or other malicious activities. The remote nature of the attack means that threat actors can exploit this vulnerability from anywhere on the internet without requiring physical access or local network presence.
Mitigation strategies for CVE-2017-16769 should prioritize immediate patch application from Synology, as this vulnerability affects the core Photo Station functionality and represents a significant security risk. Organizations should implement network segmentation to limit access to Photo Station services and ensure that only authorized personnel can reach the affected components. Additional defensive measures include monitoring network traffic for suspicious access patterns to the map viewer functionality and implementing stricter access controls for sensitive photo collections. Security teams should also consider disabling the map viewer mode if it is not essential for business operations, as this removes the attack surface entirely. The vulnerability demonstrates the importance of proper authentication enforcement and access control validation in web applications, aligning with ATT&CK technique T1078 for valid accounts and T1566 for credential harvesting through information discovery activities. Organizations should conduct thorough security assessments of their photo management systems and ensure that all web applications properly implement authentication checks before exposing sensitive data through auxiliary features like map viewers.