CVE-2022-27626 in DSM
Summary
by MITRE • 10/20/2022
A vulnerability regarding concurrent execution using shared resource with improper synchronization ('Race Condition') is found in the session processing functionality of Out-of-Band (OOB) Management. This allows remote attackers to execute arbitrary commands 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
The vulnerability identified as CVE-2022-27626 represents a critical race condition flaw within the Out-of-Band management functionality of Synology DiskStation Manager systems. This issue stems from improper synchronization mechanisms during concurrent execution scenarios where multiple processes attempt to access shared resources simultaneously without adequate protective measures. The affected models include DS3622xs+, FS3410, and HD6500 devices running DSM versions prior to 7.1.1-42962-2, creating a significant attack surface for remote adversaries seeking unauthorized system access.
The technical implementation of this vulnerability manifests through session processing functionality where concurrent operations fail to properly coordinate access to shared memory regions or system resources. When multiple threads or processes attempt to modify or access the same session data simultaneously, the lack of proper locking mechanisms or atomic operations creates windows of opportunity for malicious exploitation. This race condition allows attackers to manipulate the timing and execution flow of concurrent processes, potentially leading to arbitrary code execution within the system context. The unspecified attack vectors suggest that the vulnerability could be triggered through various network-based interactions with the management interfaces.
The operational impact of this vulnerability extends beyond simple privilege escalation, as successful exploitation could enable attackers to gain full control over affected devices. Remote command execution capabilities present a severe threat to network security posture, particularly for storage systems that often serve as critical infrastructure components. The affected Synology devices operate in environments where they may be exposed to external networks, making them attractive targets for cybercriminals seeking persistent access to organizational storage resources. The vulnerability's presence in multiple model lines increases the potential attack surface significantly, affecting both enterprise and small business deployments.
Mitigation strategies should prioritize immediate deployment of the patched DSM version 7.1.1-42962-2 which addresses the synchronization issues through proper locking mechanisms and resource coordination protocols. Network segmentation and access control measures should be implemented to limit exposure of management interfaces to trusted networks only, following principle of least privilege guidelines. Security monitoring should be enhanced to detect anomalous session processing patterns that might indicate exploitation attempts, while regular vulnerability assessments should be conducted to identify similar synchronization issues in other system components. The vulnerability aligns with CWE-362, which specifically addresses race conditions in concurrent programming, and represents a significant concern from ATT&CK framework perspective under initial access and execution tactics, particularly T1059 for command and script interpreter execution. Organizations should also consider implementing network-based intrusion detection systems to monitor for exploitation attempts targeting this specific vulnerability pattern.