CVE-2018-5347 in Personal Cloud
Summary
by MITRE
Seagate Media Server in Seagate Personal Cloud has unauthenticated command injection in the uploadTelemetry and getLogs functions in views.py because .psp URLs are handled by the fastcgi.server component and shell metacharacters are mishandled.
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Analysis
by VulDB Data Team • 08/13/2024
The vulnerability CVE-2018-5347 affects Seagate Personal Cloud devices running the Seagate Media Server software, representing a critical command injection flaw that enables unauthenticated remote attackers to execute arbitrary commands on the affected system. This vulnerability specifically resides within the uploadTelemetry and getLogs functions located in the views.py file of the web application. The flaw stems from improper handling of .psp URL requests that are processed by the fastcgi.server component, which creates a dangerous attack surface where shell metacharacters are not adequately sanitized or escaped before being passed to underlying system commands.
The technical implementation of this vulnerability exploits the lack of proper input validation and sanitization in the web application's request handling pipeline. When .psp URLs are processed through the fastcgi.server component, the system fails to properly escape or filter special shell characters that could be interpreted by the command shell. This allows attackers to inject malicious commands that get executed with the privileges of the web server process, typically running with elevated permissions on the device. The vulnerability is particularly dangerous because it operates without requiring authentication, making it accessible to any remote attacker who can reach the device's web interface.
The operational impact of this vulnerability extends beyond simple command execution, as it provides attackers with complete control over the affected Seagate Personal Cloud device. Successful exploitation could lead to data exfiltration, persistence mechanisms being established, system compromise, and potential lateral movement within networks where the device is connected. The affected device serves as a personal cloud storage solution that often contains sensitive personal data, media files, and potentially network credentials, making the compromise of such a device particularly concerning from a security perspective. The vulnerability also represents a significant risk to network security as it allows attackers to use the device as a pivot point for attacking other systems within the local network.
Mitigation strategies for CVE-2018-5347 should focus on immediate remediation through firmware updates provided by Seagate, which would address the input validation and sanitization issues in the affected code. Network segmentation and firewall rules should be implemented to restrict access to the device's web interface from untrusted networks, while also ensuring that only authorized personnel can access the device's management interfaces. Additional protective measures include disabling unnecessary services, implementing strong authentication mechanisms, and monitoring network traffic for suspicious activity related to the affected device. Organizations should also consider deploying intrusion detection systems to monitor for exploitation attempts targeting this specific vulnerability. The vulnerability aligns with CWE-78 which describes improper neutralization of special elements used in OS commands, and represents a technique commonly associated with the attack pattern of command injection as documented in the ATT&CK framework under the execution phase.