CVE-2017-9851 in Solar System
Summary
by MITRE
An issue was discovered in SMA Solar Technology products. By sending nonsense data or setting up a TELNET session to the database port of Sunny Explorer, the application can be crashed.
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Analysis
by VulDB Data Team • 08/05/2024
The vulnerability identified as CVE-2017-9851 affects SMA Solar Technology products, specifically targeting their Sunny Explorer application through improper input validation and error handling mechanisms. This weakness resides in the application's failure to properly validate data received through network connections, particularly when establishing telnet sessions to database ports. The issue stems from insufficient sanitization of incoming data streams that allows malicious actors to exploit the system's lack of robust input validation controls, leading to potential application instability and service disruption.
This vulnerability represents a classic example of insufficient input validation, which maps to CWE-20 - Improper Input Validation, and falls under the broader category of buffer overflows and memory corruption issues. The attack vector involves sending malformed or unexpected data to the database port, which triggers an application crash due to the absence of proper error handling procedures. The Sunny Explorer application fails to implement adequate defensive measures against malformed input, allowing attackers to exploit this weakness through simple network-based attacks that require minimal technical expertise. The vulnerability demonstrates a fundamental flaw in the application's security architecture where network communication endpoints lack proper validation and sanitization mechanisms.
The operational impact of CVE-2017-9851 extends beyond simple application crashes to potentially disrupt critical solar energy monitoring and management operations. When the Sunny Explorer application crashes, it can lead to complete loss of monitoring capabilities for solar installations, affecting energy production tracking, system diagnostics, and operational oversight. This disruption can result in significant financial losses for solar energy operators who rely on continuous monitoring of their installations. The vulnerability also creates opportunities for more sophisticated attacks as the application's instability may provide entry points for additional exploitation attempts, potentially leading to unauthorized access to system resources or data compromise.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and sanitization controls within the application's network communication layers. Organizations should deploy network segmentation and access control measures to limit exposure of database ports to unauthorized users, implementing the principle of least privilege to restrict telnet access to only necessary administrative personnel. The implementation of proper error handling mechanisms and defensive programming practices is essential to prevent application crashes from malformed input. Additionally, regular security updates and patches should be applied to address known vulnerabilities, while network monitoring solutions should be deployed to detect and alert on suspicious network activity targeting the affected ports. This vulnerability aligns with ATT&CK techniques related to command and control communications and application layer attacks, emphasizing the need for layered defensive strategies that address both network and application security controls.