CVE-2017-14344 in WinDriver
Summary
by MITRE
This vulnerability allows local attackers to escalate privileges on Jungo WinDriver 12.4.0 and earlier. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the processing of IOCTL 0x95382673 by the windrvr1240 kernel driver. The issue lies in the failure to properly validate user-supplied data which can result in a kernel pool overflow. An attacker can leverage this vulnerability to execute arbitrary code under the context of kernel.
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Analysis
by VulDB Data Team • 11/15/2019
This vulnerability represents a critical privilege escalation flaw in Jungo WinDriver version 12.4.0 and earlier, where local attackers can elevate their privileges from low-privileged user accounts to kernel-level execution. The vulnerability stems from insufficient input validation within the windrvr1240 kernel driver when processing a specific IOCTL command with the identifier 0x95382673. The flaw manifests as a kernel pool overflow condition that occurs during the processing of user-supplied data, creating an exploitable memory corruption vulnerability that directly compromises system integrity.
The technical implementation of this vulnerability follows the CWE-121 CWE-125 and CWE-787 categories, which encompass stack-based buffer overflows, heap-based buffer overflows, and out-of-bounds writes. The kernel pool overflow occurs when the driver fails to properly validate the size and content of data structures passed through the IOCTL interface, allowing an attacker to manipulate memory layout and potentially overwrite critical kernel structures. This type of vulnerability directly maps to ATT&CK technique T1068 which describes 'Exploitation for Privilege Escalation' and T1059 which covers 'Command and Scripting Interpreter' as attackers can leverage this to execute arbitrary code with elevated privileges. The vulnerability's impact is particularly severe because it operates entirely within the kernel context, bypassing standard user-mode security controls and access restrictions.
The operational implications of this vulnerability extend beyond simple privilege escalation, as it provides attackers with complete control over the target system. Once exploited, the attacker gains the ability to modify system memory, install rootkits, modify system files, and potentially access all user data and network communications. The attack requires only local execution capability, making it particularly dangerous in environments where users have access to the system but should not possess administrative privileges. This vulnerability affects systems running vulnerable versions of WinDriver, which is commonly used in embedded systems, industrial control environments, and various Windows-based applications that require direct hardware access.
Mitigation strategies for this vulnerability should include immediate patching of all affected systems with the latest version of Jungo WinDriver that addresses this specific kernel pool overflow issue. System administrators should implement the principle of least privilege, ensuring that users have only the minimum necessary permissions to perform their required tasks. Additional protective measures include monitoring for unusual IOCTL activity patterns, implementing kernel-mode exploit detection systems, and conducting regular security assessments of kernel drivers. Organizations should also consider disabling unnecessary kernel drivers and implementing application whitelisting policies to prevent exploitation attempts. The vulnerability serves as a reminder of the critical importance of proper input validation in kernel-mode code and the potential catastrophic consequences when such validation is inadequate.