CVE-2018-0710 in Q'center Virtual Appliance
Summary
by MITRE
Command injection vulnerability in SSH of QNAP Q'center Virtual Appliance version 1.7.1063 and earlier could allow authenticated users to run arbitrary commands.
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Analysis
by VulDB Data Team • 09/11/2024
The CVE-2018-0710 vulnerability represents a critical command injection flaw within the SSH implementation of QNAP Q'center Virtual Appliance versions up to 1.7.1063. This vulnerability resides in the authentication and command execution handling mechanisms of the appliance's Secure Shell service, which serves as the primary remote management interface for administrators. The flaw allows authenticated users to escalate their privileges and execute arbitrary system commands with elevated permissions, potentially compromising the entire virtual appliance environment.
The technical root cause of this vulnerability stems from insufficient input validation and sanitization within the SSH command processing pipeline. When legitimate users authenticate to the QNAP Q'center Virtual Appliance via SSH, the system fails to properly escape or filter command parameters that are passed to underlying system executables. This creates an environment where maliciously crafted input can be interpreted as shell commands rather than simple data parameters, enabling attackers to inject and execute arbitrary code on the target system. The vulnerability specifically affects the appliance's handling of certain command-line arguments that are processed through shell contexts without proper sanitization.
From an operational impact perspective, this vulnerability presents a significant risk to organizations relying on QNAP Q'center Virtual Appliances for their virtualization infrastructure management. An authenticated attacker with legitimate credentials can leverage this flaw to gain root-level access to the appliance, potentially leading to complete system compromise. The attack surface extends beyond simple command execution to include data exfiltration, system modification, and potential lateral movement within the network environment. Given that QNAP appliances often serve as central management points for virtualized environments, this vulnerability could enable attackers to compromise multiple virtual machines and systems under the appliance's control.
The vulnerability aligns with CWE-77 and CWE-78 categories from the Common Weakness Enumeration framework, specifically addressing command injection weaknesses in input handling. From the MITRE ATT&CK framework perspective, this vulnerability maps to multiple techniques including T1059.001 for command and scripting interpreter and T1068 for exploit for privilege escalation. The authenticated nature of the vulnerability means that attackers typically need to obtain valid user credentials before exploitation, but once achieved, the impact can be devastating. Organizations should consider this vulnerability as part of a broader attack chain where initial access might come through credential compromise, phishing, or other initial compromise vectors.
Mitigation strategies for CVE-2018-0710 should focus on immediate patching of affected QNAP Q'center Virtual Appliance versions, with the vendor releasing updates that properly sanitize command-line inputs and implement proper shell escaping mechanisms. Network segmentation and access control measures should be implemented to limit the blast radius of potential exploitation, including restricting SSH access to trusted IP addresses and implementing multi-factor authentication. Organizations should also conduct thorough vulnerability assessments to identify any other systems that might be running affected versions of the QNAP software. Additionally, monitoring systems should be configured to detect unusual command execution patterns and unauthorized access attempts to the appliance's SSH service. Regular security audits and penetration testing should be performed to ensure that similar vulnerabilities are not present in other components of the virtualization infrastructure.