CVE-2018-18929 in Seneca HDn
Summary
by MITRE
The Tightrope Media Carousel Seneca HDn Windows-based appliance 7.0.4.104 is shipped with a default local administrator username and password. This can be found by a limited user account in an "unattend.xml" file left over on the C: drive from the Sysprep process. An attacker with this username and password can leverage it to gain administrator-level access on the system.
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Analysis
by VulDB Data Team • 01/29/2024
The Tightrope Media Carousel Seneca HDn appliance represents a specialized media playback solution designed for Windows-based environments, yet it suffers from a critical security flaw that undermines its operational integrity. This vulnerability manifests through the inclusion of hardcoded administrative credentials within the system's deployment configuration, specifically embedded within an unattended installation file that persists on the system after the Sysprep process. The device ships with a default administrative account that has a predictable username and password combination, creating an inherent security weakness that directly violates fundamental security principles of credential management and system hardening. The presence of these credentials in the unattend.xml file represents a significant oversight in the appliance's security design, as this file contains configuration parameters that should never include sensitive authentication information.
The technical exploitation of this vulnerability occurs through the discovery of the unattend.xml file located on the C: drive, a remnant from the system preparation process that is typically intended to be removed during the finalization of the installation. This file contains the administrative credentials in plain text format, making them easily accessible to any user account with read permissions to the system drive. The flaw directly relates to CWE-798, which addresses the use of hard-coded credentials, and CWE-259, concerning the use of hard-coded passwords. When an attacker gains access to a limited user account on the system, they can simply locate this file and extract the administrative credentials, thereby bypassing normal authentication mechanisms. The vulnerability represents a privilege escalation path that allows a low-privilege user to elevate their access level to full administrative control, effectively compromising the entire system.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it fundamentally undermines the security posture of any organization deploying this appliance. The compromised system becomes vulnerable to a wide range of malicious activities including but not limited to data exfiltration, system modification, privilege escalation to other network resources, and potential use as a pivot point for further attacks within the network. This vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and T1548.001 which addresses abuse of credentials. Organizations using this appliance face significant risk as attackers can leverage this flaw to gain persistent access to their media systems, potentially compromising sensitive content or using the appliance as a staging point for broader network infiltration. The vulnerability is particularly concerning because it affects the appliance at the time of deployment, meaning that any organization implementing this solution without proper credential management practices is immediately exposed to this risk.
Mitigation strategies for this vulnerability require immediate action to address the hardcoded credentials and implement proper security hardening procedures. Organizations should immediately change the default administrative credentials upon deployment and ensure that the unattend.xml file is properly secured or removed from the system. The appliance should be configured with strong, unique administrative passwords that are generated during the installation process rather than using default values. Security best practices dictate that all system configuration files containing authentication information should be protected with appropriate access controls and permissions. Additionally, network segmentation should be implemented to limit access to the appliance, and regular security audits should be performed to identify any remaining instances of hardcoded credentials. The vulnerability underscores the importance of proper configuration management and the need for vendors to implement secure-by-design principles that eliminate default credentials and hard-coded values in deployed systems, as recommended by NIST SP 800-53 security controls.