CVE-2023-44219 in Directory Services Connector
Summary
by MITRE • 10/27/2023
A local privilege escalation vulnerability in SonicWall Directory Services Connector Windows MSI client 4.1.21 and earlier versions allows a local low-privileged user to gain system privileges through running the recovery feature.
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Analysis
by VulDB Data Team • 11/19/2023
The SonicWall Directory Services Connector Windows MSI client contains a critical local privilege escalation vulnerability that affects versions 4.1.21 and earlier. This flaw resides within the recovery feature implementation and enables a local attacker with minimal privileges to elevate their access level to system administrator status. The vulnerability represents a significant security risk as it allows unauthorized users to bypass normal access controls and gain complete control over the affected system. The issue stems from improper privilege handling during the recovery process where the system fails to properly validate the execution context of recovery operations. This weakness creates an exploitable path where a low-privileged user can manipulate the recovery mechanism to execute arbitrary code with elevated privileges, effectively undermining the entire security model of the Windows client.
The technical implementation of this vulnerability involves a privilege escalation flaw that operates through the recovery functionality of the SonicWall client software. When the recovery feature is invoked, the system does not properly enforce privilege boundaries, allowing a local user to inject malicious code or manipulate system components during the recovery process. The flaw likely involves insufficient input validation or improper privilege checking during critical system operations, enabling the attacker to escalate privileges without proper authentication or authorization. This type of vulnerability is classified as a privilege escalation issue and aligns with CWE-276, which covers improper privileges and access control mechanisms. The recovery feature typically requires elevated permissions to function correctly, but the vulnerability allows a local user to bypass these requirements through manipulation of the recovery process itself.
The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with complete system control and access to sensitive data. Once elevated to system privileges, an attacker can modify system files, install malware, access encrypted data, and potentially establish persistence within the network. The vulnerability affects enterprise environments where SonicWall Directory Services Connector is deployed, potentially exposing organizations to significant security risks including data breaches, lateral movement, and complete system compromise. Organizations using affected versions may experience unauthorized access to critical infrastructure components and loss of integrity in their directory services. This vulnerability particularly impacts environments where directory services integration is critical for authentication and access control, as it undermines the trust model that these services provide.
Mitigation strategies for this vulnerability should include immediate patching of the SonicWall Directory Services Connector client to versions that address the privilege escalation flaw. Organizations should also implement monitoring for unusual recovery feature usage patterns and establish privileged access controls to limit local user capabilities. The recommended approach involves applying vendor security patches as soon as they become available, while maintaining comprehensive logging of system activities related to recovery operations. Security teams should also conduct privilege reviews to ensure that local accounts have only necessary permissions and implement least privilege principles for all system components. Additionally, network segmentation and access controls should be reviewed to minimize the impact if exploitation occurs. This vulnerability demonstrates the importance of proper privilege management in system recovery features and aligns with ATT&CK technique T1068, which covers local privilege escalation through system recovery mechanisms. Organizations should also consider implementing additional security controls such as application whitelisting and integrity checking to prevent unauthorized modifications to the recovery process components.