Impact Analysis

The vulnerability can allow an attacker to gain higher privileges on the affected system than they are normally authorized to have. This escalation of privileges could enable the attacker to perform unauthorized actions, potentially compromising system security and integrity.

Useful 0 Not Useful 0

Executive Summary

This vulnerability exists in the TVicPort64.sys component of EnTech Taiwan TVicPort Product version 4.0, specifically in file version 5.2.1.0. It allows attackers to escalate their privileges by sending specially crafted IOCTL 0x80002008 requests to the system.

Useful 0 Not Useful 0

Compliance Impact

The vulnerability in TVicPort64.sys allows local attackers to escalate privileges by exploiting a NULL DACL, enabling arbitrary physical memory read and write operations. This can lead to unauthorized access and modification of sensitive data on affected systems.

Such unauthorized access and privilege escalation can compromise the confidentiality, integrity, and availability of data, which are core principles in compliance frameworks like GDPR and HIPAA.

Therefore, if exploited, this vulnerability could result in violations of these regulations by exposing protected personal or health information, failing to maintain adequate security controls, and potentially leading to data breaches.

Useful 0 Not Useful 0

Mitigation Strategies

Since the vulnerable TVicPort64.sys driver is unmaintained and no patched version has been released by the vendor, immediate mitigation steps include:

• Remove or disable the TVicPort64.sys driver from affected systems to prevent exploitation.
• Restrict local user access to systems where the driver is installed, as the vulnerability allows local privilege escalation.
• Monitor systems for suspicious activity involving IOCTL requests, especially those targeting IOCTL 0x80002008.
• Consider using application whitelisting or driver signing enforcement policies to prevent loading untrusted or vulnerable drivers.

Useful 0 Not Useful 0

Executive Summary

CVE-2026-30769 is a vulnerability in the TVicPort64.sys driver component of EnTech Taiwan's TVicPort product. The issue arises because the driver creates a device object with a NULL Discretionary Access Control List (DACL), which means any local user can open a handle to the device and send crafted IOCTL (Input/Output Control) requests, specifically IOCTL 0x80002008.

This flaw allows attackers to perform arbitrary physical memory read and write operations, enabling them to escalate their privileges on the affected system.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can have serious impacts because it allows a local attacker to escalate privileges by exploiting the ability to send crafted IOCTL requests to the vulnerable driver.

• An attacker can gain higher system privileges than originally granted.
• It enables arbitrary physical memory read and write, which can be used to bypass security features.
• This can lead to full system compromise, unauthorized access to sensitive data, and potential installation of persistent malware.

Useful 0 Not Useful 0

Detection Guidance

This vulnerability involves the TVicPort64.sys driver creating a device object with a NULL Discretionary Access Control List (DACL), allowing any local user to open a handle and send IOCTL commands. Detection involves checking for the presence of the vulnerable TVicPort64.sys driver on the system.

To detect the vulnerable driver, you can check if TVicPort64.sys is loaded on your system using commands like:

• On Windows, run: `sc query tvicport64` or `driverquery | findstr tvicport64.sys`
• Alternatively, use PowerShell: `Get-WmiObject Win32_SystemDriver | Where-Object { $_.Name -like '*tvicport64*' }`

If the driver is present, further investigation is needed to determine if it is the vulnerable version (File v5.2.1.0). Checking the file version and timestamp of TVicPort64.sys can help confirm this.

Useful 0 Not Useful 0