CVE-2022-34006 in TitanFTP NextGen
Summary
by MITRE • 06/20/2022
An issue was discovered in TitanFTP (aka Titan FTP) NextGen before 1.2.1050. When installing, Microsoft SQL Express 2019 installs by default with an SQL instance running as SYSTEM with BUILTIN\Users as sysadmin, thus enabling unprivileged Windows users to execute commands locally as NT AUTHORITY\SYSTEM, aka NX-I674 (sub-issue 2).
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Analysis
by VulDB Data Team • 06/20/2022
The vulnerability identified as CVE-2022-34006 represents a critical privilege escalation flaw within TitanFTP NextGen software version 1.2.1049 and earlier. This issue stems from the default installation configuration of Microsoft SQL Express 2019 that is bundled with the TitanFTP software. The vulnerability occurs during the installation process when SQL Server Express 2019 is configured to run under the SYSTEM account context while simultaneously granting sysadmin privileges to the BUILTIN\Users group. This misconfiguration creates a fundamental security weakness that allows any unprivileged Windows user to gain elevated system-level access.
The technical flaw manifests through the improper configuration of SQL Server service accounts and security permissions within the TitanFTP installation process. When Microsoft SQL Express 2019 installs, it defaults to running the SQL Server service under the SYSTEM account, which possesses the highest level of privileges available within the Windows operating system. Concurrently, the installation process grants sysadmin privileges to the BUILTIN\Users group, which includes all local users without authentication requirements. This combination creates a direct pathway for privilege escalation attacks where local users can leverage SQL Server's elevated permissions to execute arbitrary commands with SYSTEM-level privileges. The vulnerability operates under the principle of least privilege violation, where unnecessary high-privilege access is granted to low-privilege user accounts.
The operational impact of this vulnerability is severe and far-reaching within Windows environments where TitanFTP NextGen is deployed. Any local user, including those with minimal privileges, can exploit this vulnerability to execute commands as NT AUTHORITY\SYSTEM, effectively bypassing all local security controls and access restrictions. This privilege escalation capability enables attackers to perform actions such as modifying system files, creating new user accounts, installing malware, accessing sensitive data, and potentially establishing persistent backdoors within the compromised system. The vulnerability undermines the fundamental security model of Windows operating systems by allowing unauthenticated local users to gain system-level control without requiring any authentication credentials or specialized attack tools. The impact extends beyond individual systems to potentially compromise entire network infrastructures if multiple systems are running vulnerable versions of TitanFTP.
The vulnerability aligns with several common weakness enumerations and attack patterns within cybersecurity frameworks. It corresponds to CWE-276, which describes improper privilege assignment, and CWE-787, which addresses out-of-bounds write vulnerabilities that can occur when privilege escalation paths are improperly configured. From an ATT&CK framework perspective, this vulnerability maps to T1068, which covers privilege escalation through the exploitation of local system services, and T1547.001, which addresses registry run keys and startup folder modifications that can occur when system-level privileges are compromised. The vulnerability also reflects patterns described in T1059, which covers command and scripting interpreters, as attackers can execute commands with elevated privileges to perform further malicious activities. Organizations should implement immediate mitigations including updating to TitanFTP NextGen version 1.2.1050 or later, reviewing and restricting SQL Server service account permissions, and implementing proper access controls to prevent unauthorized users from executing commands on systems with vulnerable configurations.
Mitigation strategies for CVE-2022-34006 should focus on both immediate remediation and long-term security hardening measures. The primary recommendation involves updating to TitanFTP NextGen version 1.2.1050 or later, which contains patches addressing the default SQL Server configuration issues. Security administrators should also manually review SQL Server service account configurations to ensure that services do not run under SYSTEM accounts with broad permissions. The BUILTIN\Users group should be removed from sysadmin roles, and proper access controls should be implemented to restrict SQL Server administrative privileges to only authorized personnel. Network segmentation and least privilege principles should be enforced to limit the potential impact of successful exploitation. Additionally, organizations should implement monitoring solutions to detect unauthorized access attempts and command execution activities that may indicate exploitation of this vulnerability. Regular security assessments and vulnerability scanning should be conducted to identify similar misconfigurations in other software components that may present similar privilege escalation risks.