CVE-2018-11178 in DR Series Disk Backup
Summary
by MITRE
Quest DR Series Disk Backup software version before 4.0.3.1 allows command injection (issue 36 of 46).
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Analysis
by VulDB Data Team • 03/19/2023
The CVE-2018-11178 vulnerability affects Quest DR Series Disk Backup software versions prior to 4.0.3.1, representing a critical command injection flaw that resides within the software's handling of user-supplied input. This vulnerability manifests as a failure to properly sanitize or validate command parameters, allowing malicious actors to inject arbitrary commands that execute with the privileges of the affected system. The issue is categorized as a command injection vulnerability, which falls under the Common Weakness Enumeration (CWE) category CWE-77, specifically targeting improper neutralization of special elements used in command execution. The vulnerability impacts the software's ability to process user inputs correctly, creating a pathway for attackers to bypass normal access controls and execute unauthorized operations on the target system. Given that this is a disk backup software, the potential for damage extends beyond simple command execution to include data theft, system compromise, and disruption of backup operations that are critical to organizational disaster recovery plans.
The technical exploitation of this vulnerability occurs when the software processes user input without adequate sanitization, allowing attackers to append malicious commands to legitimate operations. Attackers can leverage this flaw by crafting specially formatted input that gets passed through to underlying system commands, potentially executing shell commands with elevated privileges. The vulnerability's impact is amplified because backup systems typically run with high privileges to perform their functions, making successful exploitation particularly dangerous. The command injection can occur during various operations such as backup scheduling, restore procedures, or configuration management within the DR Series software. This type of vulnerability aligns with the ATT&CK framework's technique T1059.001, which covers command and script interpreters, and T1068, which addresses exploit for privilege escalation. The flaw essentially provides attackers with a direct path to execute arbitrary code on the system, potentially leading to full system compromise.
The operational impact of CVE-2018-11178 extends far beyond simple unauthorized command execution, as backup systems serve as critical infrastructure components for data protection and business continuity. Organizations relying on affected Quest DR Series software face significant risks including data loss, unauthorized access to backup repositories, and potential lateral movement within network environments. The vulnerability can enable attackers to manipulate backup operations, potentially corrupting backup data or creating false backups that could prevent successful recovery during actual disaster scenarios. System administrators may find their backup operations compromised, leading to potential data breaches and regulatory compliance violations. The attack surface is particularly concerning because backup systems often contain sensitive organizational data, making them attractive targets for cybercriminals. The vulnerability's presence in the disk backup software creates a scenario where attackers could gain persistent access to backup infrastructure, potentially allowing them to maintain long-term presence within the network while avoiding detection mechanisms that typically monitor network traffic for suspicious activities.
Mitigation strategies for CVE-2018-11178 should prioritize immediate software updates to version 4.0.3.1 or later, which contains the necessary patches to address the command injection vulnerability. Organizations should implement network segmentation to limit access to backup systems, ensuring that only authorized personnel can interact with the DR Series software. Input validation and sanitization measures should be enhanced throughout the application, particularly in areas where user input is processed and forwarded to system commands. Security monitoring should be implemented to detect unusual command execution patterns that might indicate exploitation attempts. Regular vulnerability assessments should be conducted to identify similar issues in other backup and storage systems. The remediation process should include comprehensive testing of the patched software to ensure that the vulnerability has been properly addressed without introducing new issues. Additionally, organizations should review their backup and recovery procedures to ensure that any potential compromise of backup systems can be detected and responded to effectively. Implementation of principle of least privilege access controls for backup systems and regular security audits will further reduce the risk of exploitation and ensure that backup infrastructure remains a secure component of the overall security posture.