CVE-2023-32454 in DUP Framework
Summary
by MITRE • 02/06/2024
DUP framework version 4.9.4.36 and prior contains insecure operation on Windows junction/Mount point vulnerability. A local malicious standard user could exploit the vulnerability to create arbitrary files, leading to denial of service
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Analysis
by VulDB Data Team • 03/01/2024
The vulnerability identified as CVE-2023-32454 affects the DUP framework version 4.9.4.36 and earlier releases, presenting a critical security flaw related to Windows junction and mount point operations. This issue stems from insecure handling of symbolic links and directory junctions within the Windows operating system, creating a pathway for privilege escalation and system compromise. The vulnerability specifically targets the framework's interaction with Windows file system junctions and mount points, which are essential components for managing directory structures and file system virtualization. When properly exploited, this flaw allows a local attacker with standard user privileges to manipulate the file system in ways that should typically be restricted to administrators or system processes.
The technical implementation of this vulnerability involves the DUP framework's failure to properly validate or sanitize junction and mount point operations performed on Windows systems. The flaw occurs during the processing of file system operations that involve creating or manipulating junction points, which are essentially directory junctions that redirect file system requests from one location to another. This insecure operation allows an attacker to create arbitrary files in locations where such operations should be restricted, effectively bypassing normal file system access controls and permissions. The vulnerability manifests when the framework attempts to handle junction points without proper validation of the target paths, creating opportunities for malicious file creation in system directories or other restricted locations.
The operational impact of CVE-2023-32454 extends beyond simple privilege escalation, as it provides a foundation for more sophisticated attacks and system compromise. A local malicious user can leverage this vulnerability to create files in locations that would normally be protected from modification, potentially leading to persistent backdoors, system instability, or complete denial of service conditions. The ability to create arbitrary files in restricted system locations can be exploited to overwrite critical system files, inject malicious code, or disrupt normal system operations. This vulnerability essentially undermines the Windows file system security model by allowing standard users to perform operations that should require elevated privileges, creating a significant risk for enterprise environments where multiple users share systems. The impact is particularly severe in environments where the DUP framework is used extensively for system management or file operations, as it provides an attack vector that can be exploited to gain unauthorized access to system resources and potentially escalate privileges to administrative levels.
Mitigation strategies for CVE-2023-32454 should focus on immediate patching of the affected DUP framework version to the latest release that addresses this vulnerability. Organizations should implement comprehensive monitoring of file system junction and mount point operations to detect suspicious activity patterns that might indicate exploitation attempts. The security controls should include restricting user access to file system junction creation capabilities and implementing proper access control lists that prevent unauthorized file creation in system directories. Additionally, system administrators should conduct regular security assessments to identify any unauthorized junction points or mount points that might have been created as a result of this vulnerability. The mitigation approach should align with industry standards such as those outlined in CWE-787 for out-of-bounds write vulnerabilities and ATT&CK technique T1059 for command and script injection, as the exploitation of this vulnerability can lead to command execution and privilege escalation. Organizations should also consider implementing network segmentation and least privilege access controls to limit the potential impact of successful exploitation, ensuring that even if an attacker successfully exploits this vulnerability, they cannot easily move laterally within the network infrastructure.