CVE-2017-17425 in NetVault Backup
Summary
by MITRE
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Quest NetVault Backup 11.3.0.12. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of NVBUSourceDeviceSet Get method requests. The issue results from the lack of proper validation of a user-supplied string before using it to construct SQL queries. An attacker can leverage this vulnerability to execute code in the context of the underlying database. Was ZDI-CAN-4237.
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Analysis
by VulDB Data Team • 01/03/2020
This vulnerability in Quest NetVault Backup version 11.3.0.12 represents a critical remote code execution flaw that undermines the security posture of backup systems. The vulnerability stems from insufficient input validation within the NVBUSourceDeviceSet Get method implementation, creating a pathway for unauthenticated attackers to compromise systems. The flaw specifically manifests when the application processes user-supplied strings without adequate sanitization before incorporating them into SQL query constructions. This type of vulnerability aligns with CWE-89, known as Improper Neutralization of Special Elements used in an SQL Command, which is a well-documented weakness in database security. The absence of authentication requirements significantly amplifies the risk, as attackers can exploit this without needing valid credentials, making it particularly dangerous in environments where backup systems are accessible over networks.
The technical exploitation of this vulnerability occurs through SQL injection techniques that leverage the improperly validated user input. When an attacker sends crafted requests to the NVBUSourceDeviceSet Get method, the application fails to validate or sanitize the input string before using it in database operations. This allows malicious input to be interpreted as part of the SQL command rather than as data, potentially enabling attackers to manipulate database queries and execute arbitrary commands. The vulnerability's impact extends beyond simple data manipulation, as successful exploitation can result in code execution within the database context, potentially providing attackers with elevated privileges and access to sensitive backup data. This scenario represents a classic SQL injection attack vector that can be leveraged for data exfiltration, system compromise, or further network infiltration.
The operational impact of CVE-2017-17425 is severe for organizations relying on Quest NetVault Backup systems, as it creates a persistent security risk that can be exploited remotely without authentication. Backup systems are often considered critical infrastructure components that store sensitive organizational data, making them attractive targets for attackers seeking long-term access or data theft. The vulnerability's characteristics align with attack patterns documented in the MITRE ATT&CK framework under techniques such as T1071.004 for application layer protocol and T1210 for exploitation of remote services. Organizations may face significant consequences including data breaches, regulatory compliance violations, and operational disruption when such vulnerabilities are exploited. The lack of authentication requirements means that even systems with limited network access could be compromised if they expose the vulnerable backup service.
Mitigation strategies for this vulnerability should focus on immediate patching and network segmentation approaches. Organizations must prioritize applying the vendor-provided security updates to resolve the input validation flaws in the NVBUSourceDeviceSet Get method implementation. In addition to patching, network administrators should implement strict access controls to limit exposure of the backup service to only authorized systems and users. The principle of least privilege should be enforced by restricting database access permissions and implementing proper input sanitization measures. Security monitoring should be enhanced to detect anomalous database query patterns that might indicate exploitation attempts. Organizations should also consider implementing database activity monitoring solutions and regular security assessments to identify similar vulnerabilities in other applications and systems. The remediation process should include comprehensive testing to ensure that patches do not introduce compatibility issues while maintaining the integrity of backup operations.