CVE-2019-18288 in SPPA-T3000 Application Server
Summary
by MITRE
A vulnerability has been identified in SPPA-T3000 Application Server (All versions). An attacker with valid authentication at the RMI interface could be able to gain remote code execution through an unsecured file upload. Please note that an attacker needs to have access to the Application Highway in order to exploit this vulnerability. At the time of advisory publication no public exploitation of this security vulnerability was known.
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Analysis
by VulDB Data Team • 03/11/2024
The vulnerability identified as CVE-2019-18288 affects the SPPA-T3000 Application Server, a critical component in industrial automation and control systems used primarily in power generation and process control environments. This vulnerability represents a significant security risk within the industrial control systems (ICS) domain, where the integrity and availability of control systems directly impact operational safety and mission-critical infrastructure. The SPPA-T3000 system operates as a comprehensive application server platform that manages various industrial processes, making it a prime target for adversaries seeking to compromise industrial operations.
The technical flaw resides in the Remote Method Invocation (RMI) interface of the SPPA-T3000 Application Server, where an insecure file upload mechanism exists that allows authenticated users to upload arbitrary files to the system. This vulnerability stems from inadequate input validation and improper file handling within the RMI service implementation, creating a path for remote code execution when combined with valid authentication credentials. The flaw specifically manifests when the system fails to properly sanitize file upload parameters, allowing attackers to bypass security restrictions and execute malicious code with the privileges of the application server process. This represents a classic path-to-privilege escalation vulnerability that aligns with CWE-434, which describes insecure file upload vulnerabilities where applications accept untrusted files without proper validation.
The operational impact of this vulnerability extends beyond simple remote code execution, as it provides attackers with a foothold within industrial control environments where system integrity is paramount. The requirement for valid authentication at the RMI interface means that attackers must first compromise legitimate user credentials or exploit other authentication bypass mechanisms, but once achieved, the vulnerability enables full control over the application server. This control can be leveraged to manipulate industrial processes, disrupt operations, or establish persistent access points within the industrial network infrastructure. The fact that an attacker needs access to the Application Highway demonstrates the layered nature of industrial security, where compromising one access point can lead to broader system compromise, aligning with ATT&CK technique T1190 for Exploit Public-Facing Application and T1078 for Valid Accounts.
The security implications of this vulnerability are particularly concerning given the industrial context where the SPPA-T3000 system operates. Industrial control systems often have limited security awareness and may lack proper network segmentation, making such vulnerabilities more dangerous when exploited. The absence of public exploitation at the time of advisory publication does not diminish the severity, as the vulnerability creates a persistent threat vector that can be weaponized by sophisticated attackers. Organizations operating these systems should consider the potential for supply chain attacks or insider threats that could provide the necessary authentication credentials to exploit this vulnerability. Mitigation strategies should include implementing network segmentation to isolate the Application Highway, enforcing strict access controls and monitoring for unusual file upload activities, and applying vendor-provided patches immediately upon release. Additionally, organizations should conduct thorough vulnerability assessments of their industrial control systems to identify similar insecure file upload mechanisms that may exist within other components of their operational technology infrastructure.