CVE-2017-14075 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 0x953824a7 by the windrvr1240 kernel driver. The issue lies in the failure to properly validate user-supplied data which can result in an out-of-bounds write condition. An attacker can leverage this vulnerability to execute arbitrary code under the context of kernel.
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Analysis
by VulDB Data Team • 01/11/2021
The vulnerability identified as CVE-2017-14075 represents a critical privilege escalation flaw within Jungo WinDriver version 12.4.0 and earlier implementations. This vulnerability exists in the windrvr1240 kernel driver and specifically targets the processing of a particular IOCTL command identified by the hexadecimal value 0x953824a7. The flaw stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied data before processing, creating a dangerous condition that can be exploited by local attackers. The vulnerability operates at the kernel level, meaning that successful exploitation can result in complete system compromise with elevated privileges.
The technical nature of this vulnerability can be classified under CWE-121, which describes "Stack-based Buffer Overflow" conditions that occur when data is written beyond the bounds of a buffer. This particular implementation manifests as an out-of-bounds write condition that occurs during the handling of the specified IOCTL request. The vulnerability creates a scenario where attacker-controlled data can overwrite adjacent memory locations, potentially corrupting kernel structures or redirecting execution flow. The flaw is particularly dangerous because it allows an attacker with low-privileged access to escalate their privileges to kernel level, effectively bypassing operating system security mechanisms and gaining unrestricted access to system resources.
From an operational perspective, this vulnerability presents significant risk to systems running affected versions of Jungo WinDriver, particularly in enterprise environments where multiple users may have access to systems with this software installed. The attack vector requires an initial foothold through a low-privileged code execution scenario, which could be achieved through social engineering, phishing attacks, or exploitation of other vulnerabilities in the system. Once the initial access is gained, the attacker can leverage this privilege escalation vulnerability to execute arbitrary code with kernel-level privileges, enabling them to install rootkits, modify system files, or extract sensitive data without detection. The impact extends beyond individual system compromise to potentially affect entire network infrastructures if the vulnerable software is deployed across multiple systems.
The exploitation of this vulnerability aligns with techniques documented in the MITRE ATT&CK framework under the privilege escalation tactics, specifically targeting kernel-mode exploitation methods. Organizations should consider implementing layered security controls including kernel patching, privilege access controls, and monitoring for suspicious IOCTL activity. The recommended mitigation strategy involves immediate deployment of the vendor-provided security patches for Jungo WinDriver versions 12.4.1 and later, which address the input validation deficiencies in the windrvr1240 driver. System administrators should also implement monitoring solutions that can detect anomalous IOCTL patterns and consider restricting access to kernel-level drivers through proper access control mechanisms. Additionally, regular vulnerability assessments and security audits should be conducted to identify and remediate similar issues in other kernel-mode components of the system.