CVE-2018-8993 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 0xf1002001.
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Analysis
by VulDB Data Team • 01/16/2020
The vulnerability identified as CVE-2018-8993 resides within Windows Master software version 7.99.13.604, specifically targeting the WoptiHWDetect.SYS driver component. This driver serves as a hardware detection utility within the optimization suite, making it a critical system component that interacts directly with kernel-level operations. The flaw manifests through improper input validation mechanisms within the driver's handling of IOCTL (Input/Output Control) requests, particularly when processing the specific control code 0xf1002001. This represents a classic example of insufficient validation of untrusted data, a weakness that has been catalogued under CWE-20 in the Common Weakness Enumeration framework.
The technical execution of this vulnerability occurs when local users submit malformed input parameters to the WoptiHWDetect.SYS driver through the designated IOCTL interface. The driver fails to validate the size, format, or content of these input values before processing them, creating a potential exploitation vector that can trigger system instability. When the driver processes these unvalidated inputs, it can lead to memory corruption conditions that ultimately result in a Blue Screen of Death (BSOD) system crash. The vulnerability's impact extends beyond simple denial of service, as the unspecified other impacts suggest potential privilege escalation or information disclosure scenarios that could allow attackers to gain elevated system privileges or access sensitive system information.
From an operational perspective, this vulnerability presents significant risks to system availability and integrity within environments where Windows Master optimization software is deployed. Local users with minimal privileges can leverage this flaw to disrupt system operations, potentially causing service interruptions and requiring system restarts. The attack surface is particularly concerning because the vulnerability exists within a driver that operates at kernel level, meaning any successful exploitation could provide attackers with direct access to system memory and critical operating system functions. The ATT&CK framework categorizes this type of vulnerability under privilege escalation techniques, specifically targeting the 'Exploitation for Privilege Escalation' tactic where local users can leverage driver-level flaws to gain elevated system access.
Mitigation strategies for CVE-2018-8993 should prioritize immediate software updates from the vendor, as the vulnerability represents a known flaw in a specific version of the optimization suite. System administrators should implement strict access controls to limit local user privileges and monitor for unusual driver activity or BSOD occurrences that might indicate exploitation attempts. The vulnerability's nature suggests that input validation fixes should be implemented at the driver level to properly sanitize all IOCTL parameters before processing. Additionally, organizations should consider implementing endpoint detection and response solutions that can monitor for suspicious driver behavior and unauthorized system modifications. Network segmentation and privilege separation measures can help contain potential exploitation attempts, while regular system monitoring and patch management procedures should be enforced to prevent similar vulnerabilities from persisting in the environment. The vulnerability underscores the importance of proper driver security practices and input validation mechanisms that are fundamental to maintaining system integrity and preventing unauthorized access to critical system resources.