CVE-2023-34136 in GMS
Summary
by MITRE • 07/13/2023
Vulnerability in SonicWall GMS and Analytics allows unauthenticated attacker to upload files to a restricted location not controlled by the attacker. This issue affects GMS: 9.3.2-SP1 and earlier versions; Analytics: 2.5.0.4-R7 and earlier versions.
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Analysis
by VulDB Data Team • 08/02/2023
This vulnerability represents a critical file upload flaw in SonicWall Global Management System and Analytics platforms that enables remote attackers to bypass authentication mechanisms and execute unauthorized file operations. The vulnerability specifically affects versions 9.3.2-SP1 and earlier for GMS, and 2.5.0.4-R7 and earlier for Analytics, creating a significant attack surface that could allow adversaries to place malicious files in restricted system directories. The flaw stems from inadequate input validation and access control mechanisms within the file upload functionality, which fails to properly authenticate or authorize file transfer operations to sensitive locations. This represents a direct violation of the principle of least privilege and demonstrates a fundamental weakness in the application's security architecture that allows unauthorized system modifications through web-based interfaces.
The technical exploitation of this vulnerability involves an attacker leveraging the absence of proper authentication checks during file upload operations to place files in system directories that should remain restricted to authorized administrators. This issue falls under CWE-434 which specifically addresses "Unrestricted Upload of File with Dangerous Type" and aligns with ATT&CK technique T1195.001 for "Upload Files to Cloud Storage" and T1059.001 for "Command and Scripting Interpreter". The vulnerability's impact extends beyond simple file placement as it creates potential for privilege escalation, remote code execution, and system compromise. Attackers could upload malicious scripts or binaries that would execute with system privileges, potentially leading to full system takeover. The restricted locations targeted by this vulnerability are typically protected areas where legitimate system files reside, making unauthorized access particularly dangerous.
The operational impact of this vulnerability is severe as it fundamentally undermines the security posture of organizations relying on SonicWall GMS and Analytics for network management and monitoring. Organizations may experience unauthorized access to critical system components, potential data exfiltration, and complete compromise of their network security infrastructure. The unauthenticated nature of the attack means that even organizations with strong perimeter defenses could be compromised if their SonicWall systems are accessible from untrusted networks. This vulnerability also impacts the integrity of security monitoring capabilities since attackers could potentially modify or replace legitimate monitoring tools with malicious equivalents, creating blind spots in network security. The affected versions span a significant timeframe, indicating that many organizations may have been exposed to this risk for extended periods without detection.
Organizations should immediately implement mitigations including patching to the latest supported versions of both GMS and Analytics platforms, implementing network segmentation to limit access to these management interfaces, and deploying web application firewalls to monitor and block suspicious file upload attempts. Additional security measures include restricting access to the affected systems through network access control lists, implementing multi-factor authentication for administrative access, and conducting comprehensive network scans to identify any unauthorized file placements that may have already occurred. The vulnerability highlights the importance of proper input validation and access control implementation, as well as the need for regular security assessments of management interfaces. Organizations should also consider implementing file integrity monitoring solutions to detect unauthorized modifications to critical system directories and establish incident response procedures specifically addressing potential exploitation of this type of vulnerability.