CVE-2022-22688 in DiskStation Manager
Summary
by MITRE • 03/25/2022
Improper neutralization of special elements used in a command ('Command Injection') vulnerability in File service functionality in Synology DiskStation Manager (DSM) before 6.2.4-25556-2 allows remote authenticated users to execute arbitrary commands via unspecified vectors.
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Analysis
by VulDB Data Team • 03/27/2022
The vulnerability identified as CVE-2022-22688 represents a critical command injection flaw within Synology DiskStation Manager's file service functionality. This security weakness affects DSM versions prior to 6.2.4-25556-2 and enables remote authenticated attackers to execute arbitrary commands on affected systems. The vulnerability stems from improper neutralization of special elements used in command execution contexts, creating a pathway for malicious input manipulation that bypasses intended security controls. The flaw specifically impacts the file service component which processes user requests and handles various file operations, making it a significant concern for organizations relying on Synology NAS devices for their storage infrastructure.
The technical implementation of this command injection vulnerability occurs when the file service functionality fails to properly sanitize user-supplied input before incorporating it into system commands. Attackers can exploit this weakness by crafting malicious inputs that contain special command characters or sequences which are then interpreted and executed by the underlying operating system. This type of vulnerability falls under the Common Weakness Enumeration category CWE-77, which specifically addresses improper neutralization of special elements used in a command. The attack vector requires authentication, meaning that an attacker must first establish valid credentials to access the system, but once authenticated, they can leverage this vulnerability to execute arbitrary code with the privileges of the authenticated user.
The operational impact of CVE-2022-22688 extends beyond simple command execution, as it can potentially allow attackers to escalate privileges, access sensitive data, modify system configurations, or even establish persistent access to affected networks. Organizations utilizing Synology DSM systems are particularly vulnerable since the flaw exists within core file service functionality that is frequently used for data management and sharing operations. The remote nature of the attack means that exploitation can occur from external network locations, increasing the attack surface and potential damage. This vulnerability directly aligns with MITRE ATT&CK framework technique T1059 which covers command and scripting interpreter, specifically targeting the execution of malicious commands through compromised systems. The impact is compounded by the fact that legitimate users can inadvertently trigger this vulnerability through normal file operations, making detection more challenging.
Mitigation strategies for CVE-2022-22688 primarily focus on immediate system updates to the patched DSM versions that address the command injection flaw. Organizations should prioritize updating their Synology NAS devices to DSM 6.2.4-25556-2 or later versions where the vulnerability has been resolved. Additionally, implementing network segmentation and access controls can limit the potential impact of exploitation by restricting unauthorized access to the affected systems. Security monitoring should be enhanced to detect unusual command execution patterns and unauthorized file operations that might indicate exploitation attempts. System administrators should also review and restrict user permissions where possible, implementing the principle of least privilege to minimize potential damage from successful attacks. The vulnerability demonstrates the critical importance of regular security patch management and proper input validation in preventing command injection attacks that can compromise entire network infrastructures.