CVE-2024-28099 in VT Studio
Summary
by MITRE • 04/15/2024
VT STUDIO Ver.8.32 and earlier contains an issue with the DLL search path, which may lead to insecurely loading Dynamic Link Libraries. As a result, arbitrary code may be executed with the privileges of the running application.
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Analysis
by VulDB Data Team • 08/09/2024
The vulnerability identified as CVE-2024-28099 affects VT STUDIO version 8.32 and earlier, presenting a critical security flaw in the software's dynamic link library loading mechanism. This issue stems from improper handling of the Windows DLL search order, creating opportunities for malicious actors to execute arbitrary code with elevated privileges. The vulnerability represents a classic insecure library loading scenario that has been documented in various security frameworks and standards.
The technical flaw manifests when the application attempts to load dynamic link libraries without properly specifying the full path to the required modules. In Windows environments, the system searches for DLL files in a specific order including the application directory, system directories, and paths listed in the PATH environment variable. When applications fail to explicitly specify the full path to required libraries, they become susceptible to path manipulation attacks where malicious DLLs placed in strategic locations can be loaded instead of the legitimate ones. This behavior directly aligns with CWE-778, which describes improper restriction of operations within a limited context, and more specifically relates to CWE-427, which covers uncontrolled search path.
The operational impact of this vulnerability is severe as it allows for privilege escalation attacks where an attacker can execute code with the same privileges as the running application. If the application is running with administrative privileges, this vulnerability could potentially lead to complete system compromise. The attack vector typically involves placing a malicious DLL file in a directory that appears earlier in the Windows search path than the legitimate library location, causing the application to load the malicious code instead of the intended library. This technique maps directly to ATT&CK tactic T1059 and technique T1059.001 which covers command and scripting interpreter, and T1574.001 which covers hijacking execution flow through dynamic link library.
Organizations using VT STUDIO version 8.32 or earlier should immediately implement mitigations to address this vulnerability. The most effective approach involves updating to the latest version of VT STUDIO where the DLL loading mechanism has been properly secured. When an update is not immediately possible, administrators should consider implementing application whitelisting policies that restrict which DLLs can be loaded by the application. Additionally, system administrators should conduct thorough security audits to identify and remove any unnecessary directories from the PATH environment variable that could be exploited. The Windows Security Configuration Wizard and Group Policy settings can be configured to enforce secure DLL loading practices by setting the LOAD_LIBRARY_AS_DATAFILE flag or using the SetDllDirectory function to control the search path. Organizations should also implement monitoring solutions that can detect anomalous DLL loading behavior and alert security teams to potential exploitation attempts.