CVE-2020-13634 in Windows Master
Summary
by MITRE
In Windows Master (aka Windows Optimization Master) 7.99.13.604, the driver file (WoptiHWDetect.SYS) allows local users to cause a denial of service (BSOD) or possibly have unspecified other impact because of not validating input values from IOCtl 0xF1002558
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Analysis
by VulDB Data Team • 05/30/2020
The vulnerability identified as CVE-2020-13634 resides within Windows Master, specifically version 7.99.13.604, where the WoptiHWDetect.SYS driver component exhibits insufficient input validation behavior. This driver serves as a hardware detection utility within the optimization software suite, handling various system-level operations through Windows I/O control codes. The flaw manifests when processing IOCTL code 0xF1002558, which represents a specific interface for communicating with the driver. The vulnerability stems from the driver's failure to properly validate or sanitize input parameters received through this particular control code, creating a potential attack surface that could be exploited by local malicious actors.
The technical implementation of this vulnerability follows a classic buffer overflow or input validation pattern that falls under CWE-20, which describes improper input validation. When a local user submits crafted input data through the vulnerable IOCTL interface, the driver processes these parameters without adequate checks for size, type, or content. This lack of validation allows for the possibility of overwriting memory structures or manipulating driver behavior in unintended ways. The most immediate consequence is the potential for a Blue Screen of Death (BSOD) to occur, which represents a denial of service condition that completely halts system operation. However, the vulnerability description suggests that more severe impacts may be possible, potentially including privilege escalation or arbitrary code execution depending on the specific nature of the input validation failure.
The operational impact of CVE-2020-13634 extends beyond simple system availability concerns as it represents a local privilege escalation vector within the context of a compromised system. Attackers with standard user privileges can leverage this vulnerability to cause system instability or potentially gain elevated privileges. The attack requires local system access, making it less severe than remote exploitation scenarios but still concerning for environments where multiple users share systems or where the software is deployed with elevated privileges. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and system binary proxy execution, as the driver operates at a kernel level where local users can potentially manipulate system behavior through malformed IOCTL calls. The vulnerability also relates to defense evasion techniques since a BSOD can be used to mask malicious activities or disrupt forensic analysis.
Mitigation strategies for this vulnerability should focus on both immediate remediation and long-term system hardening. The primary solution involves updating to a patched version of Windows Master software where the driver properly validates all input parameters received through IOCTL 0xF1002558. System administrators should also implement monitoring for unusual IOCTL activity patterns that might indicate exploitation attempts. Additional mitigations include restricting local user privileges where possible, implementing application whitelisting policies to prevent unauthorized driver loading, and conducting regular security assessments of third-party software components. The vulnerability demonstrates the importance of proper input validation in kernel-mode drivers and highlights the need for comprehensive security testing of system-level components, particularly those that handle direct hardware interaction through IOCTL interfaces. Organizations should also consider implementing runtime protection mechanisms and endpoint detection and response solutions to identify and prevent exploitation attempts targeting similar vulnerabilities in other system components.