CVE-2019-18341 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) contains an authentication bypass vulnerability. A remote attacker with network access to the CCS server could exploit this vulnerability to read data from the EDIR directory (for example, the list of all configured stations).
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Analysis
by VulDB Data Team • 03/11/2024
The vulnerability CVE-2019-18341 represents a critical authentication bypass flaw within the SiNVR 3 surveillance system family, specifically affecting both the Central Control Server and Video Server components across all versions. This issue resides within the Secure File Transfer Protocol service that operates on the default port 22/tcp, which is the standard port for SSH connections. The flaw allows remote attackers to bypass the authentication mechanism entirely, granting them unauthorized access to sensitive data stored within the system's EDIR directory. The implications of this vulnerability extend beyond simple data access, as it fundamentally undermines the security model of the surveillance infrastructure by removing the primary barrier that should protect against unauthorized network access. This authentication bypass represents a severe weakness in the system's defense-in-depth strategy, as it provides attackers with direct access to the core configuration and operational data that should remain protected from external threats.
The technical nature of this vulnerability stems from improper implementation of the SFTP service authentication mechanisms within the SiNVR 3 platform. When a remote attacker establishes a connection to the default SSH port, the system fails to properly validate credentials or implement required authentication checks, allowing immediate access to the EDIR directory contents. This flaw falls under the category of CWE-287 - Improper Authentication, which specifically addresses situations where authentication mechanisms are either missing, incorrectly implemented, or bypassed entirely. The vulnerability's impact is amplified by the fact that it operates at the network level, requiring only basic network connectivity to the target system rather than physical access or sophisticated attack vectors. The EDIR directory contains critical operational data including lists of configured stations, which could provide attackers with comprehensive mapping of the surveillance network topology and potentially reveal sensitive information about system configuration and operational scope. This information could be leveraged to plan more targeted attacks or identify additional vulnerabilities within the broader network infrastructure.
From an operational perspective, the exploitation of this vulnerability poses significant risks to organizations relying on SiNVR 3 systems for security monitoring and surveillance operations. The ability to read station configurations and operational data without authentication creates opportunities for attackers to understand the complete surveillance footprint, potentially identifying gaps in coverage, access patterns, and system interconnections. This intelligence could be used for various malicious purposes including planning physical breaches, conducting social engineering attacks, or developing more sophisticated targeting strategies. The vulnerability also represents a potential entry point for broader network compromise, as surveillance systems often serve as critical infrastructure components that may provide access to other network segments or sensitive operational data. Organizations may face regulatory compliance issues if this vulnerability results in unauthorized data access, particularly in environments where surveillance systems handle personally identifiable information or other sensitive data types. The remote nature of the attack means that organizations cannot rely on physical security measures or local access controls to prevent exploitation, as the vulnerability can be exploited from anywhere on the internet.
Mitigation strategies for CVE-2019-18341 should focus on immediate remediation actions including applying vendor-provided patches or updates that address the authentication bypass vulnerability in the SFTP service implementation. Organizations should also implement network segmentation to restrict access to the affected systems, limiting the attack surface by ensuring that only authorized personnel and systems can reach the default SSH port. Network access control lists should be configured to restrict connections to the affected services from known good IP addresses only, while implementing additional monitoring for suspicious connection attempts. The principle of least privilege should be enforced by ensuring that the SFTP service operates with minimal required permissions and that access to the EDIR directory is properly restricted. Organizations should also conduct comprehensive network scans to identify all instances of the vulnerable SiNVR 3 systems and ensure that appropriate firewall rules are in place to prevent unauthorized access to the default SSH port. Regular security assessments should be performed to identify similar authentication bypass vulnerabilities in other network services, as this type of flaw represents a common pattern in security implementations that could affect other components within the organization's infrastructure. The vulnerability's classification under ATT&CK technique T1078 - Valid Accounts indicates that attackers may leverage this weakness to maintain persistent access to the system, making early detection and remediation critical to prevent long-term compromise of the surveillance infrastructure.