CVE-2022-47526 in DataDiode
Summary
by MITRE • 05/31/2023
Fox-IT DataDiode (aka Fox DataDiode) 3.4.3 suffers from a path traversal vulnerability with resultant arbitrary writing of files. A remote attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the downstream node user. Exploitation of this issue does not require user interaction.
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Analysis
by VulDB Data Team • 06/24/2023
The Fox-IT DataDiode represents a critical network security appliance designed to provide secure data transfer between isolated networks through a hardware-based approach that prevents direct network connectivity between security zones. This device operates as a physical data diode, ensuring unidirectional data flow while maintaining strict network segmentation. The vulnerability identified in version 3.4.3 stems from improper input validation within the device's file handling mechanisms, creating a path traversal condition that allows attackers to manipulate file system operations beyond intended boundaries.
This path traversal vulnerability specifically manifests when the device processes file operations without adequate sanitization of user-supplied input paths. The flaw enables an attacker to traverse directory structures and write files to arbitrary locations within the system's file hierarchy, potentially allowing complete compromise of the downstream node's operational environment. The vulnerability exists at the application layer where file system access controls fail to properly validate or sanitize file path parameters, creating a direct pathway for malicious file operations.
The operational impact of this vulnerability extends beyond simple file manipulation as it provides a complete arbitrary code execution capability within the context of the downstream node user. This means that an attacker could potentially install backdoors, modify system configurations, or escalate privileges to gain unauthorized access to sensitive data or system resources. The vulnerability's remote exploitability eliminates the need for physical access or user interaction, making it particularly dangerous as it can be leveraged from any network position capable of reaching the device's management interfaces.
The technical exploitation of this vulnerability aligns with common attack patterns documented in the attack framework, specifically mapping to techniques involving path traversal and privilege escalation. According to CWE guidelines, this represents a variant of CWE-22 Path Traversal, where insufficient input validation allows attackers to manipulate file system operations. The vulnerability's classification under ATT&CK framework would fall under T1059 Command and Scripting Interpreter and T1068 Exploitation for Privilege Escalation, as the attacker can execute arbitrary code and potentially escalate to higher privilege levels.
Organizations utilizing Fox-IT DataDiode appliances should immediately implement mitigation strategies including firmware updates to versions that address the path traversal vulnerability, network segmentation to limit access to management interfaces, and comprehensive monitoring of file system operations. Additionally, implementing strict access controls, disabling unnecessary management services, and conducting regular security assessments of networked devices will help reduce the attack surface and prevent exploitation attempts. The vulnerability underscores the critical importance of proper input validation and secure coding practices in network security appliances that handle sensitive data transfers between isolated environments.