CVE-2019-18342 in SiNVR 3 Central Control Server
Summary
by MITRE
A vulnerability has been identified in SiNVR 3 Central Control Server (CCS) (all versions), SiNVR 3 Video Server (all versions). The SFTP service (default port 22/tcp) of the SiNVR 3 Central Control Server (CCS) does not properly limit its capabilities to the specified purpose. In conjunction with CVE-2019-18341, an unauthenticated remote attacker with network access to the CCS server could exploit this vulnerability to read or delete arbitrary files, or access other resources on the same server.
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Analysis
by VulDB Data Team • 03/11/2024
The vulnerability identified as CVE-2019-18342 affects SiNVR 3 Central Control Server and Video Server products across all versions, representing a critical security flaw in the SFTP service implementation. This issue manifests within the default port 22/tcp service configuration where the SFTP subsystem fails to properly enforce access controls and operational limitations inherent to its designated purpose. The vulnerability stems from inadequate privilege separation and resource access validation mechanisms within the SFTP service implementation, allowing for potential unauthorized operations beyond the intended scope of file transfer services.
The technical exploitation of CVE-2019-18342 becomes particularly dangerous when considered in conjunction with CVE-2019-18341, creating a combined attack vector that enables unauthenticated remote adversaries to perform arbitrary file operations on affected systems. The flaw exists in the service's capability limitation mechanisms, where the SFTP implementation does not sufficiently restrict file system access based on user authentication status or operational context. This weakness allows attackers to bypass normal access controls and potentially execute read, write, or delete operations on server resources without proper authorization, fundamentally undermining the security model of the affected SiNVR systems.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it provides attackers with the ability to manipulate critical system resources that could include configuration files, log data, or even surveillance footage stored on the servers. The remote nature of the attack vector eliminates the need for physical access or local network presence, making the vulnerability particularly concerning for networked security infrastructure. Organizations utilizing SiNVR 3 systems face potential data integrity compromises, unauthorized surveillance access, and possible system compromise that could affect overall security operations and compliance requirements.
Security professionals should consider this vulnerability in the context of CWE-250, which addresses "Execute Code with Unusual or Unconventional Path" and CWE-284, which covers "Improper Access Control." The attack pattern aligns with ATT&CK techniques including T1078 for valid accounts and T1046 for network service scanning, as attackers may first identify the vulnerable SFTP service before exploiting the access control weakness. Mitigation strategies should include immediate patch application from the vendor, network segmentation to limit access to the affected services, implementation of firewall rules to restrict port 22 access, and monitoring for unauthorized access attempts. Additionally, organizations should consider disabling unnecessary services, implementing strong authentication mechanisms, and conducting comprehensive security assessments of their surveillance infrastructure to identify similar vulnerabilities in related systems.