CVE-2017-12075 in DiskStation Manager
Summary
by MITRE
Command injection vulnerability in EZ-Internet in Synology DiskStation Manager (DSM) before 6.2-23739 allows remote authenticated users to execute arbitrary command via the username parameter.
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Analysis
by VulDB Data Team • 01/15/2025
The vulnerability identified as CVE-2017-12075 represents a critical command injection flaw within the EZ-Internet component of Synology DiskStation Manager (DSM) versions prior to 6.2-23739. This issue affects remote authenticated users who can exploit the vulnerability through the username parameter, potentially enabling arbitrary command execution on the affected system. The flaw exists within the web interface handling of user input, specifically in how the system processes and validates the username parameter during EZ-Internet configuration operations.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the DSM web server component. When users submit data through the EZ-Internet interface, the system fails to properly escape or filter special characters that could be interpreted as command delimiters or operators. This allows attackers who have authenticated access to the system to inject malicious commands that are subsequently executed with the privileges of the web server process. The vulnerability falls under the Common Weakness Enumeration category CWE-77, which specifically addresses command injection flaws where untrusted data is passed to system commands without proper sanitization. The attack vector requires an authenticated user context, meaning that an attacker must first establish valid credentials before exploiting this vulnerability, though this limitation does not mitigate the severity of the potential impact.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with the ability to execute arbitrary code on the target system with the privileges of the web server process. This can lead to complete system compromise, data exfiltration, and potential lateral movement within network environments where the Synology DSM is deployed. The vulnerability affects organizations that rely on Synology NAS devices for file storage and network services, particularly those with multiple users or administrative accounts that could be compromised. The remote nature of the attack means that an authenticated user could potentially exploit this vulnerability from any location with network access to the DSM interface, making it particularly dangerous for organizations with remote access capabilities or cloud-based services.
Organizations should immediately implement mitigation strategies including updating to DSM version 6.2-23739 or later, which contains the necessary patches to address this vulnerability. Network segmentation and access controls should be reinforced to limit user access to administrative functions, reducing the attack surface for potential exploitation. Security monitoring should be enhanced to detect unusual command execution patterns or anomalous user behavior that might indicate exploitation attempts. Additionally, administrators should review and implement proper input validation procedures for all web applications and ensure that privilege separation is maintained between different user roles within the DSM environment. The vulnerability demonstrates the importance of secure coding practices and proper input sanitization in preventing command injection attacks, aligning with ATT&CK framework techniques that emphasize privilege escalation and command execution through web application vulnerabilities.