CVE-2018-8988 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 0xf1002008.
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Analysis
by VulDB Data Team • 01/16/2020
The vulnerability identified as CVE-2018-8988 resides within Windows Master, specifically version 7.99.13.604, where the WoptiHWDetect.SYS driver component exhibits critical security flaws that can be exploited by local attackers. This driver serves as a hardware detection utility within the optimization software suite, making it a legitimate system component that operates with elevated privileges. The vulnerability stems from inadequate input validation mechanisms within the driver's handling of IOCTL (Input/Output Control) requests, specifically targeting the control code 0xf1002008. This particular IOCTL interface represents a communication channel between user-mode applications and kernel-mode drivers, and the absence of proper validation creates a pathway for malicious input manipulation that can compromise system stability and security.
The technical flaw manifests when the WoptiHWDetect.SYS driver receives IOCTL requests without performing adequate parameter validation on the input data structures. This lack of validation allows attackers to craft malicious input values that can trigger buffer overflows, invalid memory access patterns, or other memory corruption conditions within the kernel space. When such malformed input reaches the driver's processing routines, it can lead to unpredictable behavior including system crashes, blue screen of death (BSOD) conditions, or potentially more severe consequences depending on the specific memory corruption patterns. The vulnerability falls under CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write conditions, both of which are common outcomes when input validation is insufficient in kernel-mode drivers. The attack surface is particularly concerning because local users already possess the ability to interact with this driver through legitimate system interfaces, eliminating the need for additional privilege escalation mechanisms.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as the potential for unspecified other impacts suggests that attackers might exploit this weakness to gain additional privileges or execute arbitrary code within the kernel context. A successful exploitation could result in complete system compromise, allowing attackers to bypass security controls, access sensitive system resources, or establish persistent backdoors. The BSOD conditions caused by this vulnerability can disrupt business operations and create significant downtime, particularly in enterprise environments where system stability is paramount. From an ATT&CK framework perspective, this vulnerability maps to T1068, which covers 'Exploitation for Privilege Escalation', and T1490, which addresses 'Inhibit System Recovery', as the denial of service conditions can prevent system recovery mechanisms from functioning properly. The vulnerability's impact is amplified by the fact that it operates within a legitimate system component, making detection more difficult and potentially allowing for stealthy exploitation.
Mitigation strategies for CVE-2018-8988 should focus on immediate remediation through software updates from the vendor, as well as implementing operational security measures to reduce the attack surface. System administrators should ensure that the Windows Master software is updated to versions that address this vulnerability, though the software vendor may no longer provide support for older versions. Network segmentation and privilege separation can help limit the impact of potential exploitation by restricting local user access to potentially vulnerable components. Additionally, implementing kernel-mode exploit protection mechanisms such as Driver Signature Enforcement, Kernel Mode Code Signing, and Application Control policies can provide additional layers of defense. Monitoring for unusual BSOD patterns and system instability in environments where this software is deployed can help detect exploitation attempts. The vulnerability serves as a reminder of the critical importance of proper input validation in kernel-mode components and the potential consequences when such validation is absent. Organizations should conduct thorough vulnerability assessments to identify similar issues in other driver components and ensure that all system components follow secure coding practices that prevent unauthorized privilege escalation and system compromise.