CVE-2020-6627 in Central NAS STCG2000300
Summary
by MITRE • 12/06/2022
The web-management application on Seagate Central NAS STCG2000300, STCG3000300, and STCG4000300 devices allows OS command injection via mv_backend_launch in cirrus/application/helpers/mv_backend_helper.php by leveraging the "start" state and sending a check_device_name request.
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Analysis
by VulDB Data Team • 04/23/2025
The vulnerability identified as CVE-2020-6627 represents a critical operating system command injection flaw within the web-management interface of Seagate Central Network Attached Storage devices. This security weakness affects multiple models including the STCG2000300, STCG3000300, and STCG4000300 variants, exposing them to potential exploitation by malicious actors who can execute arbitrary commands on the underlying operating system. The vulnerability specifically resides in the mv_backend_helper.php file within the cirrus/application/helpers directory structure of the affected firmware implementations.
The technical exploitation mechanism involves leveraging the mv_backend_launch function which processes requests containing a check_device_name parameter. When a user submits a request with the "start" state parameter, the application fails to properly sanitize or validate input parameters before incorporating them into system commands. This improper input handling creates a direct pathway for attackers to inject malicious commands that get executed with the privileges of the web application process, typically running with elevated system permissions. The flaw demonstrates characteristics consistent with CWE-77, which specifically addresses command injection vulnerabilities where untrusted data is directly concatenated into command strings without proper sanitization.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables full system compromise and potential lateral movement within network environments. An attacker who successfully exploits this vulnerability can execute arbitrary code on the NAS device, potentially leading to data exfiltration, system modification, or use of the compromised device as a pivot point for attacking other systems within the same network segment. The affected Seagate Central devices operate as network-accessible storage solutions that often contain sensitive corporate or personal data, making them attractive targets for cybercriminals seeking unauthorized access to valuable information assets. This vulnerability aligns with ATT&CK technique T1059.001, which covers command and scripting interpreter execution, and represents a critical entry point for attackers seeking persistent access to networked storage infrastructure.
Mitigation strategies for this vulnerability should prioritize immediate firmware updates from Seagate to address the root cause through proper input validation and sanitization. Network administrators should implement additional protective measures including network segmentation to limit access to these devices, firewall rules restricting access to management interfaces, and monitoring for suspicious command execution patterns. The vulnerability also underscores the importance of input validation practices as outlined in OWASP Top Ten A03:2021, which emphasizes the need for proper sanitization of user inputs to prevent injection attacks. Organizations should conduct comprehensive vulnerability assessments to identify other potentially affected devices within their network infrastructure and implement robust access controls to limit exposure of administrative interfaces to trusted network segments only.