CVE-2022-3576 in DSM
Summary
by MITRE • 10/20/2022
A vulnerability regarding out-of-bounds read is found in the session processing functionality of Out-of-Band (OOB) Management. This allows remote attackers to obtain sensitive information via unspecified vectors. The following models with Synology DiskStation Manager (DSM) versions before 7.1.1-42962-2 may be affected: DS3622xs+, FS3410, and HD6500.
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Analysis
by VulDB Data Team • 11/18/2022
This vulnerability represents a critical out-of-bounds read flaw within the out-of-band management subsystem of Synology DiskStation Manager software. The issue manifests in the session processing functionality where improper input validation allows attackers to manipulate data structures beyond their intended boundaries. Such vulnerabilities typically arise from insufficient bounds checking mechanisms during data handling operations, creating opportunities for unauthorized information disclosure. The affected models including DS3622xs+, FS3410, and HD6500 operate on DSM versions prior to 7.1.1-42962-2, indicating this represents a widespread issue affecting multiple storage device configurations. The out-of-band management interface provides separate network pathways for system administration and monitoring, making it a prime target for attackers seeking to extract sensitive data without direct system access.
The technical exploitation of this vulnerability occurs through unspecified attack vectors that likely involve crafted network requests or malformed session data sent to the affected management interfaces. When the system processes these inputs without proper boundary validation, it reads memory locations beyond allocated buffers, potentially exposing confidential information stored in adjacent memory regions. This type of vulnerability falls under CWE-129, which specifically addresses insufficient validation of length of input buffers, and can be classified as a memory safety issue within the broader ATT&CK framework under the technique of Information Gathering. The nature of out-of-band management systems means that even if the primary storage system remains protected, attackers can leverage this weakness to extract sensitive configuration details, authentication credentials, or system information that could facilitate further attacks.
The operational impact of this vulnerability extends beyond simple information disclosure, as the exposed data could provide attackers with critical system insights for planning more sophisticated attacks. The affected devices operate in enterprise and home network environments where they often serve as central storage solutions containing sensitive organizational data. Attackers could potentially exploit this weakness to gain knowledge about system configurations, network topology, or administrative credentials, which would significantly weaken overall security postures. The vulnerability's remote exploitability means that attackers do not require physical access or network proximity to the devices, making it particularly dangerous in environments where network segmentation is not properly implemented. This represents a significant risk for organizations relying on these storage solutions for critical data storage and management functions.
Organizations should immediately upgrade their affected Synology devices to DSM version 7.1.1-42962-2 or later to remediate this vulnerability. System administrators should also implement network monitoring to detect unusual traffic patterns that might indicate exploitation attempts against the out-of-band management interfaces. Additional mitigations include restricting access to these management interfaces through network access control lists, implementing multi-factor authentication for administrative access, and conducting regular security assessments of networked storage solutions. The vulnerability highlights the importance of maintaining current firmware versions and implementing comprehensive security monitoring for all networked devices, particularly those with separate management interfaces that operate independently of primary system functions. Security teams should also consider implementing network segmentation to isolate management interfaces from general network traffic, reducing the attack surface for such vulnerabilities.