CVE-2017-17466 in Vir.IT eXplorer Lite
Summary
by MITRE
TG Soft Vir.IT eXplorer Lite 8.5.42 allows local users to gain privileges or cause a denial of service (Arbitrary Write) via a \\.\Viragtlt DeviceIoControl request of 0x82730088.
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Analysis
by VulDB Data Team • 12/13/2019
The vulnerability identified as CVE-2017-17466 resides within TG Soft Vir.IT eXplorer Lite version 8.5.42, a security tool designed for malware detection and analysis. This particular flaw manifests as an arbitrary write condition that can be exploited by local attackers to either escalate privileges or induce a denial of service within the system. The vulnerability specifically occurs when processing DeviceIoControl requests directed at the \.\Viragtlt device, where the ioctl code 0x82730088 triggers the problematic behavior.
The technical root cause of this vulnerability stems from improper input validation and handling within the device driver component of the software. When the Viragtlt device receives the malicious DeviceIoControl request with the specified ioctl code, the system fails to adequately validate the input parameters before proceeding with memory operations. This lack of proper validation creates an opportunity for an attacker to manipulate memory locations and write arbitrary data, effectively bypassing normal security boundaries. The vulnerability represents a classic case of insufficient validation of input parameters, which aligns with CWE-125, known as "Out-of-bounds Read" and related to improper handling of device control requests.
From an operational perspective, this vulnerability presents a significant risk to systems running the affected software, particularly in enterprise environments where privilege escalation could lead to complete system compromise. Local attackers who can execute code on the target system gain the ability to write arbitrary data to memory locations, potentially allowing them to modify critical system files or inject malicious code into running processes. The denial of service aspect of this vulnerability means that even if privilege escalation is not achieved, the system could become unstable or completely unresponsive due to the arbitrary write operations corrupting memory structures.
The exploitation of this vulnerability follows patterns consistent with the attack technique described in the MITRE ATT&CK framework under T1068, which covers "Exploitation for Privilege Escalation." The arbitrary write condition provides attackers with a mechanism to modify system memory, potentially enabling them to escalate their privileges to system level. Additionally, this vulnerability falls into the category of kernel-mode exploitation techniques where local attackers can manipulate device drivers to achieve their objectives. The impact extends beyond simple privilege escalation to include potential system instability and complete service disruption.
Mitigation strategies for CVE-2017-17466 should focus on immediate remediation through software updates from the vendor, as well as network segmentation and privilege restriction measures. Organizations should ensure that the affected software is either updated to a patched version or completely removed from systems where it is not essential. Implementing least privilege principles and restricting local user access to systems running this software can significantly reduce the attack surface. Additionally, monitoring for suspicious DeviceIoControl activity and implementing proper input validation controls within the system can help detect and prevent exploitation attempts. The vulnerability also underscores the importance of proper driver security practices and input validation, which aligns with security standards such as those outlined in the Common Weakness Enumeration and the OWASP Top Ten security principles.