CVE-2019-11601 in ProSyst mBS SDK
Summary
by MITRE
A directory traversal vulnerability in remote access to backup & restore in earlier versions than ProSyst mBS SDK 8.2.6 and Bosch IoT Gateway Software 9.2.0 allows remote attackers to write or delete files at any location.
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Analysis
by VulDB Data Team • 11/28/2023
The directory traversal vulnerability identified as CVE-2019-11601 represents a critical security flaw in the backup and restore functionality of ProSyst mBS SDK versions prior to 8.2.6 and Bosch IoT Gateway Software versions prior to 9.2.0. This vulnerability resides within the remote access mechanisms that govern backup and restore operations, creating an exploitable condition that allows unauthorized remote attackers to manipulate file system operations beyond the intended scope. The flaw enables attackers to write or delete files at arbitrary locations on the affected systems, fundamentally compromising the integrity and availability of the targeted infrastructure.
The technical implementation of this vulnerability stems from insufficient input validation and inadequate path sanitization within the backup and restore modules. When remote access requests are processed through the affected software components, the system fails to properly validate or sanitize user-supplied paths that specify backup or restore locations. This absence of proper validation allows attackers to craft malicious requests containing directory traversal sequences such as ../ or ..\ that bypass normal access controls and navigate to arbitrary file system locations. The vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The flaw essentially allows attackers to circumvent the intended file system boundaries and execute operations on files outside the designated backup directories.
The operational impact of this vulnerability extends beyond simple unauthorized file access, presenting significant risks to system integrity and availability. Remote attackers can leverage this vulnerability to perform destructive operations such as deleting critical system files, overwriting configuration files, or writing malicious payloads to system locations. This capability enables attackers to compromise system stability, potentially leading to complete system compromise or denial of service conditions. The vulnerability particularly affects industrial IoT deployments where Bosch IoT Gateway Software is utilized, creating risks for operational technology environments where system reliability and security are paramount. The attack surface is broad as the vulnerability affects both the ProSyst mBS SDK and Bosch IoT Gateway Software, impacting a wide range of industrial and enterprise systems that rely on these components for remote management and backup operations.
Security mitigations for this vulnerability require immediate patching of affected systems to versions 8.2.6 or later for ProSyst mBS SDK and 9.2.0 or later for Bosch IoT Gateway Software. Organizations should implement network segmentation and access controls to limit exposure of the affected backup and restore interfaces to trusted networks only. Additional protective measures include implementing proper input validation at all system interfaces, deploying web application firewalls to filter malicious requests, and conducting regular security assessments of remote management components. From an ATT&CK framework perspective, this vulnerability maps to techniques such as T1078 Valid Accounts for initial access and T1486 Data Encrypted for Impact, as attackers could leverage this flaw to compromise system integrity and availability. System administrators should also implement comprehensive monitoring of backup and restore operations to detect anomalous file system activities that may indicate exploitation attempts, particularly focusing on unusual file creation or deletion patterns in system directories.