CVE-2017-17049 in Vir.IT eXplorer Lite
Summary
by MITRE
TG Soft Vir.IT eXplorer Lite 8.5.42 allows local users to cause a denial of service (NULL pointer dereference) or possibly have unspecified other impact via a NULL value in a 0x82730010 DeviceIoControl request to \\.\Viragtlt.
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Analysis
by VulDB Data Team • 12/11/2019
The vulnerability identified as CVE-2017-17049 affects TG Soft Vir.IT eXplorer Lite version 8.5.42, a security tool designed for malware detection and analysis. This issue manifests as a local privilege escalation vulnerability that can lead to system instability and potential unauthorized access. The flaw exists within the device driver component that handles DeviceIoControl requests, specifically when processing a 0x82730010 control code. The vulnerability represents a critical security weakness that can be exploited by malicious actors with local system access to disrupt normal system operations or potentially gain elevated privileges.
The technical root cause of this vulnerability stems from improper input validation within the kernel-mode driver component. When the Viragtlt device driver receives a DeviceIoControl request with the specific control code 0x82730010, it fails to properly validate the input parameters before attempting to process them. This lack of input sanitization leads to a NULL pointer dereference condition, where the driver attempts to access memory at address zero. Such behavior can result in immediate system crashes or more subtle memory corruption that may allow for further exploitation. The vulnerability is classified as a NULL pointer dereference under CWE-476, which represents a common class of memory safety issues in kernel-mode drivers.
The operational impact of this vulnerability extends beyond simple denial of service scenarios. Local attackers with basic system access can leverage this weakness to potentially execute arbitrary code with elevated privileges, given that the affected driver operates at kernel level. This presents a significant risk to system integrity and confidentiality, as successful exploitation could allow attackers to bypass security controls and gain unauthorized access to sensitive system resources. The vulnerability affects systems running the affected version of Vir.IT eXplorer Lite, making it particularly concerning for organizations that have not updated their security software. Attackers could potentially use this vulnerability as part of a broader attack chain, combining it with other exploits to establish persistent access to target systems.
Mitigation strategies for this vulnerability primarily focus on immediate patching and system hardening measures. Users should immediately update to the latest version of TG Soft Vir.IT eXplorer Lite that addresses this specific issue. System administrators should also implement additional security controls such as disabling unnecessary device drivers and restricting local user privileges where possible. The vulnerability aligns with ATT&CK technique T1068, which covers 'Exploitation for Privilege Escalation', and represents a classic example of how kernel-mode vulnerabilities can be exploited to gain system-level access. Organizations should also consider implementing monitoring solutions that can detect anomalous DeviceIoControl activity and potential exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify and remediate similar issues in other security software components that may be susceptible to similar input validation flaws.