CVE-2017-9862 in Solar System
Summary
by MITRE
An issue was discovered in SMA Solar Technology products. When signed into Sunny Explorer with a wrong password, it is possible to create a debug report, disclosing information regarding the application and allowing the attacker to create and save a .txt file with contents to his liking. An attacker may use this for information disclosure, or to write a file to normally unavailable locations on the local system.
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Analysis
by VulDB Data Team • 08/05/2024
The vulnerability identified as CVE-2017-9862 affects SMA Solar Technology products and represents a critical security flaw in the Sunny Explorer application. This issue manifests when users attempt to log into the system with incorrect credentials, creating an unexpected pathway for attackers to exploit the application's debug functionality. The vulnerability stems from insufficient input validation and access control mechanisms within the authentication process, allowing unauthorized users to bypass normal security restrictions through legitimate error handling procedures.
The technical implementation of this vulnerability involves the application's response to failed authentication attempts. When a user enters an incorrect password, the system's debug reporting mechanism is inadvertently triggered, enabling the creation of debug reports that contain sensitive information about the application's internal structure and operating environment. This debug functionality, designed for legitimate troubleshooting purposes, becomes a security risk when improperly controlled. The flaw allows attackers to not only access application metadata but also to generate and save text files to arbitrary locations on the local system, potentially including protected directories or system-critical locations.
From an operational perspective, this vulnerability presents significant risks to industrial control systems and energy management platforms. The information disclosure aspect can reveal application architecture details, internal file paths, and system configurations that would otherwise remain hidden from unauthorized users. This intelligence gathering capability enables attackers to plan more sophisticated attacks against the affected systems. Additionally, the file creation functionality allows for persistent modifications to the system, potentially enabling privilege escalation, data corruption, or the installation of malicious components. The impact extends beyond simple information disclosure as it provides a foothold for further exploitation and system compromise.
The vulnerability aligns with CWE-200 (Information Exposure) and CWE-732 (Incorrect Permission Assignment) categories, reflecting the dual nature of the flaw that combines information leakage with unauthorized file system access. From an attack framework perspective, this vulnerability maps to multiple ATT&CK techniques including T1083 (File and Directory Discovery) and T1070 (Indicator Removal on Host), as attackers can both gather system information and modify local files. The security implications are particularly severe in industrial environments where SMA Solar Technology products are commonly deployed for energy management and monitoring purposes. Organizations should implement immediate mitigations including disabling debug functionality for production systems, implementing proper access controls on file system operations, and conducting comprehensive security reviews of authentication mechanisms. Regular security assessments and network monitoring are essential to detect potential exploitation attempts and ensure system integrity.