CVE-2005-2986 in V3Net
Summary
by MITRE
The v3flt2k.sys driver in AhnLab V3Pro 2004 Build 6.0.0.383, V3 VirusBlock 2005 Build 6.0.0.383, V3Net for Windows Server 6.0 Build 6.0.0.383 does not properly validate the source of the DeviceIoControl commands, which allows remote attackers to gain privileges.
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Analysis
by VulDB Data Team • 07/11/2018
The vulnerability described in CVE-2005-2986 represents a critical privilege escalation flaw within the AhnLab V3Pro security suite, specifically affecting versions 2004 Build 6.0.0.383 and related products. This issue resides in the v3flt2k.sys kernel driver component that operates at the system level to provide security filtering capabilities. The vulnerability stems from insufficient input validation mechanisms within the driver's DeviceIoControl handling routine, which processes IOCTL commands from user-mode applications. When the driver receives DeviceIoControl requests, it fails to properly authenticate or validate the source of these commands, creating an exploitable condition that allows unauthenticated remote attackers to submit malicious IOCTL requests directly to the vulnerable kernel driver.
The technical flaw manifests as a lack of proper access control validation within the kernel driver's command processing logic. According to CWE-284, this vulnerability represents an improper access control condition where the driver does not adequately verify the legitimacy of incoming DeviceIoControl commands. The absence of source validation means that any remote attacker who can establish communication with the vulnerable system can potentially submit specially crafted IOCTL requests that exploit the driver's handling of these commands. This creates a scenario where the kernel driver executes arbitrary code with elevated privileges, effectively bypassing the normal security boundaries that separate user-mode applications from kernel-mode operations.
The operational impact of this vulnerability is severe and far-reaching, as it enables remote privilege escalation attacks that can completely compromise the affected systems. Attackers can leverage this vulnerability to execute arbitrary code with kernel-level privileges, potentially leading to complete system compromise, data exfiltration, or persistent backdoor installation. The vulnerability affects multiple AhnLab products including V3Pro 2004, V3 VirusBlock 2005, and V3Net for Windows Server, indicating a widespread issue within the product line. According to ATT&CK framework, this vulnerability maps to privilege escalation techniques where adversaries gain elevated access to systems, potentially enabling further lateral movement and persistence within networks. The remote nature of the attack means that exploitation can occur without requiring physical access to the target system, making it particularly dangerous for enterprise environments.
Mitigation strategies for this vulnerability should focus on immediate remediation through official patches provided by AhnLab, as well as network-level security controls to prevent unauthorized access to affected systems. Organizations should implement network segmentation to limit access to systems running vulnerable AhnLab products, disable unnecessary network services, and ensure that all systems are updated with the latest security patches. The vulnerability also highlights the importance of proper kernel driver security practices including input validation, access control enforcement, and privilege separation. Security administrators should monitor for exploitation attempts and consider implementing additional security controls such as kernel-mode code integrity checking and runtime application control to prevent exploitation of similar vulnerabilities in the future.