CVE-2023-1186 in Webcam for Remote Desktop
Summary
by MITRE • 03/06/2023
A vulnerability has been found in FabulaTech Webcam for Remote Desktop 2.8.42 and classified as problematic. This vulnerability affects the function 0x222010/0x222018 in the library ftwebcam.sys of the component IOCTL Handler. The manipulation leads to null pointer dereference. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used. VDB-222358 is the identifier assigned to this vulnerability.
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Analysis
by VulDB Data Team • 03/31/2023
The vulnerability identified as CVE-2023-1186 represents a critical null pointer dereference flaw within FabulaTech Webcam for Remote Desktop version 2.8.42. This security issue resides in the ftwebcam.sys kernel driver component, specifically within the IOCTL handler functions 0x222010 and 0x222018. The vulnerability stems from improper input validation and error handling within the device driver's communication interface, creating a condition where a null pointer reference can be dereferenced during legitimate IOCTL operations. The flaw demonstrates characteristics consistent with CWE-476, which specifically addresses null pointer dereference vulnerabilities, making it a direct implementation of this well-known weakness category in kernel-mode software development.
The technical exploitation of this vulnerability requires local system access, as indicated by the attack vector classification, meaning that an attacker must already have user-level privileges or physical access to the target system to leverage this flaw. This local requirement significantly limits the attack surface compared to remotely exploitable vulnerabilities, yet it still presents a substantial security risk given that kernel-mode exploits can potentially escalate privileges and compromise the entire system. The vulnerability manifests when the IOCTL handler processes specific control codes without properly validating pointer parameters, leading to a system crash or potential privilege escalation depending on the execution context. The fact that this exploit has been publicly disclosed through VDB-222358 indicates that security researchers have documented the precise conditions under which the vulnerability can be triggered.
From an operational impact perspective, this vulnerability creates significant risks for organizations relying on FabulaTech Webcam for Remote Desktop solutions, particularly in environments where local access might be compromised through social engineering, insider threats, or other attack vectors. The null pointer dereference can result in system instability, unexpected crashes, or potentially provide attackers with opportunities to execute arbitrary code with kernel-level privileges. The vulnerability's classification as a problematic issue suggests that it could be leveraged to achieve privilege escalation or denial of service conditions that would severely impact system availability and integrity. Attackers could potentially use this flaw to establish persistent access or escalate their privileges to SYSTEM level, which would allow them to bypass standard security controls and access all system resources.
Organizations should implement immediate mitigations including updating to the latest version of FabulaTech Webcam for Remote Desktop that addresses this vulnerability, disabling the affected driver component if not actively needed, and implementing strict access controls to limit local system access. The vulnerability's presence in a kernel driver component makes it particularly concerning as it operates at the most privileged level of the operating system, providing potential attackers with extensive control over system resources. Security monitoring should be enhanced to detect unusual IOCTL activity patterns that might indicate exploitation attempts, and system integrity checks should be performed to identify any unauthorized modifications to the affected driver files. This vulnerability also highlights the importance of proper input validation in kernel-mode drivers, aligning with ATT&CK technique T1068 which covers privilege escalation through kernel exploits, and reinforces the need for comprehensive driver security assessments as recommended by industry best practices for endpoint security management.