CVE-2024-45874 in Vooki
Summary
by MITRE • 10/08/2024
A DLL hijacking vulnerability in VegaBird Vooki 5.2.9 allows attackers to execute arbitrary code / maintain persistence via placing a crafted DLL file in the same directory as Vooki.exe.
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Analysis
by VulDB Data Team • 10/11/2024
This vulnerability represents a critical DLL hijacking flaw in VegaBird Vooki version 5.2.9 that enables remote code execution and persistent access through malicious DLL placement. The vulnerability stems from the application's improper handling of dynamic link library loading mechanisms during startup, specifically when the application searches for required libraries in its local directory. When Vooki.exe executes, it attempts to load certain DLL dependencies from its installation directory without properly validating or specifying the full path to these libraries, creating an exploitable condition where attackers can place malicious DLL files in the same directory as the executable. This behavior aligns with CWE-426 Untrusted Search Path vulnerabilities, which occur when applications search for libraries in directories that can be manipulated by untrusted users. The flaw operates under the principle of privilege escalation through path manipulation, where the application's execution context inherits the security context of the user running Vooki.exe, potentially allowing attackers to execute code with the privileges of the target user. From an operational perspective, this vulnerability presents a significant risk for attackers seeking to establish persistent access to systems running the affected software, as the malicious DLL will execute every time the application starts, creating a reliable foothold for further exploitation. The attack vector is particularly concerning because it requires minimal user interaction beyond the initial installation or execution of the vulnerable application, making it suitable for automated exploitation campaigns. The vulnerability directly maps to ATT&CK technique T1574.001 for DLL Side-Loading, which involves replacing legitimate DLLs with malicious ones in the same directory as the target application, and T1059.001 for Command and Scripting Interpreter, as the malicious DLL can execute arbitrary code within the application's execution context. The impact extends beyond simple code execution to include potential privilege escalation scenarios, especially when the vulnerable application runs with elevated privileges or when the target system has administrative accounts. Attackers can leverage this vulnerability to maintain persistence through the creation of additional malicious components that survive application restarts, and the vulnerability's exploitation does not require network connectivity, making it particularly stealthy and difficult to detect through network monitoring alone. The attack surface includes any system where the vulnerable version of Vooki is installed, with the risk being elevated in enterprise environments where multiple users may be running the application or where it is deployed as part of standard business applications.
The technical implementation of this vulnerability involves the application's dynamic loading behavior where it relies on the system's PATH environment variable search order to locate required libraries. When Vooki.exe attempts to load a DLL that is not explicitly specified with a full path, the operating system searches through directories in the PATH order, including the current working directory where the executable resides. This search order allows attackers to place malicious DLLs in the same directory as Vooki.exe, causing the system to load the attacker-controlled library instead of the legitimate one. The vulnerability is particularly dangerous because it does not require the attacker to have direct access to modify system-level PATH variables or registry entries, but rather can exploit the application's own loading behavior. The flaw demonstrates poor secure coding practices related to library loading and path resolution, specifically violating the principle of least privilege by not explicitly defining library paths and relying on potentially insecure search behaviors. From a defensive standpoint, organizations should immediately implement application whitelisting policies that restrict the execution of unauthorized DLLs in directories where legitimate applications are installed, and should consider implementing file system monitoring to detect unauthorized DLL placement in application directories. The vulnerability also highlights the need for regular security updates and patch management processes, as this type of issue is typically resolved through proper library path handling and explicit DLL loading mechanisms. Network segmentation and access controls should be implemented to limit the potential impact of successful exploitation, and security monitoring should include detection of suspicious DLL loading patterns and file system modifications in application directories. Additionally, the vulnerability underscores the importance of conducting regular security assessments of third-party applications and their loading behaviors, as many commercial applications exhibit similar insecure library loading practices that can be exploited by attackers. The remediation process should involve updating to a patched version of Vooki that implements secure DLL loading mechanisms, and organizations should consider implementing additional security controls such as AppLocker or similar application control technologies to prevent unauthorized DLL execution.