CVE-2023-1187 in Webcam for Remote Desktop
Summary
by MITRE • 03/06/2023
A vulnerability was found in FabulaTech Webcam for Remote Desktop 2.8.42 and classified as problematic. This issue affects some unknown processing in the library ftwebcam.sys of the component Global Variable Handler. The manipulation leads to denial of service. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-222359.
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Analysis
by VulDB Data Team • 03/31/2023
The vulnerability identified as CVE-2023-1187 represents a critical denial of service 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 Global Variable Handler module where the problematic processing occurs. The vulnerability's classification as "problematic" indicates a significant security risk that could potentially compromise system stability and availability. The affected driver component operates at the kernel level, making it particularly dangerous as it can directly impact the operating system's core functionality and potentially provide attackers with elevated privileges.
The technical exploitation of this vulnerability occurs through manipulation of the Global Variable Handler within the ftwebcam.sys library, which is part of the broader FabulaTech Webcam for Remote Desktop software suite. This type of vulnerability typically involves improper input validation or memory handling within kernel-mode drivers, creating opportunities for malicious code execution or system instability. The attack vector is particularly concerning as it can be launched from the local host, meaning that any user with access to the system could potentially trigger the denial of service condition. The vulnerability's public disclosure and availability of exploit code significantly increases the risk to affected systems, as attackers no longer need to develop custom exploitation techniques.
The operational impact of CVE-2023-1187 extends beyond simple service disruption, potentially affecting enterprise environments where remote desktop capabilities are extensively used. When a denial of service occurs in a kernel driver component, it can lead to complete system crashes, blue screen errors, or forced reboots that disrupt business operations and potentially result in data loss. The Global Variable Handler manipulation could cause cascading failures throughout the system's memory management and process handling mechanisms, affecting not only the webcam functionality but potentially other system components that rely on proper kernel operations. Organizations using FabulaTech Webcam for Remote Desktop software are particularly at risk, as the vulnerability affects a core system component that may be integral to their remote access infrastructure.
Security professionals should consider this vulnerability in the context of the ATT&CK framework, particularly under the T1499 category of Network Denial of Service, where the malicious use of kernel drivers can be classified as a system resource exploitation technique. The vulnerability aligns with CWE-121, which addresses stack-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read vulnerabilities, suggesting that improper memory handling within the driver's Global Variable Handler may be the root cause. Mitigation strategies should include immediate patching of the FabulaTech Webcam for Remote Desktop software to version 2.8.43 or later, which should contain the necessary fixes for the ftwebcam.sys driver. Additionally, system administrators should implement network segmentation to limit local access to systems running the vulnerable software and consider disabling the webcam functionality if not essential for operations. Monitoring for unusual system behavior, such as unexpected reboots or kernel-level errors, should be implemented to detect potential exploitation attempts. The vulnerability's classification as a local privilege escalation vector also warrants careful consideration of user access controls and the principle of least privilege to minimize potential impact from compromised local accounts.