CVE-2018-8991 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 0xf1002009.
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Analysis
by VulDB Data Team • 01/16/2020
The vulnerability identified as CVE-2018-8991 affects Windows Master, specifically version 7.99.13.604, through its WoptiHWDetect.SYS driver component. This represents a critical security flaw that stems from inadequate input validation mechanisms within the kernel-mode driver. The vulnerability manifests when the driver processes IOCTL (Input/Output Control) requests, specifically targeting the control code 0xf1002009. The absence of proper validation for input parameters creates an exploitable condition that can be leveraged by local attackers to manipulate the driver's behavior. This type of vulnerability falls under the category of improper input validation as classified by CWE-20, which is a fundamental weakness in software design that allows malicious input to cause unintended behavior in applications or systems.
The technical exploitation of this vulnerability enables local users to trigger a system crash resulting in a Blue Screen of Death (BSOD) or potentially achieve other unspecified impacts. The driver's failure to validate input values from the specified IOCTL request creates a path for arbitrary code execution or system instability. This flaw represents a privilege escalation vector that can be particularly dangerous in environments where local users might not have elevated privileges but could leverage this vulnerability to disrupt system operations. The attack surface is limited to local users who can interact with the vulnerable driver, but the impact can be severe as it directly affects system stability and availability. According to ATT&CK framework, this vulnerability could be categorized under privilege escalation techniques, specifically targeting driver-level vulnerabilities to gain system-level control.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it represents a potential pathway for more sophisticated attacks. Local users who can access the system may exploit this condition to cause system instability, leading to data loss or service disruption. The vulnerability's potential for unspecified other impacts suggests that beyond the documented BSOD conditions, there could be additional security implications that have not been fully characterized. This type of vulnerability is particularly concerning in enterprise environments where multiple users might have local access to systems running vulnerable software. The lack of input validation in kernel-mode drivers creates a significant risk as these components operate with elevated privileges and can directly affect system integrity and security boundaries.
Mitigation strategies for CVE-2018-8991 should focus on immediate software updates and patches provided by the vendor. System administrators should ensure that all instances of Windows Master are updated to versions that address this vulnerability. Additionally, implementing proper access controls and limiting local user privileges can help reduce the attack surface. The vulnerability highlights the importance of secure coding practices, particularly in kernel-mode drivers where input validation is critical for maintaining system stability and security. Organizations should also consider implementing monitoring solutions to detect potential exploitation attempts and establish incident response procedures for handling such vulnerabilities. Regular security assessments of third-party software components and driver installations should be conducted to identify and remediate similar issues before they can be exploited by malicious actors.