CVE-2022-48019 in Another Eden
Summary
by MITRE • 02/06/2023
The components wfshbr64.sys and wfshbr32.sys in Another Eden before v3.0.20 and before v2.14.200 allows attackers to perform privilege escalation via a crafted payload.
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Analysis
by VulDB Data Team • 03/05/2023
The vulnerability identified as CVE-2022-48019 affects the Windows Filter Driver components wfshbr64.sys and wfshbr32.sys found in the Another Eden software suite. These kernel-mode drivers serve as part of the Windows Filtering Platform infrastructure and are responsible for handling network traffic filtering operations within the system. The flaw exists in versions prior to v3.0.20 for the 64-bit component and prior to v2.14.200 for the 32-bit component, representing a critical privilege escalation vulnerability that could allow attackers to elevate their system privileges from standard user level to kernel-level access.
The technical implementation of this vulnerability stems from improper input validation and memory handling within the kernel-mode drivers. Attackers can craft malicious payloads that exploit buffer overflow conditions or arbitrary write vulnerabilities in the driver interfaces. These flaws typically occur when the drivers fail to properly validate parameters passed from user-mode applications or when they handle memory allocation without sufficient bounds checking. The specific nature of the vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and CWE-787, which covers out-of-bounds write errors. The exploitation mechanism likely involves leveraging the driver's ability to process network packets or filter rules through kernel-level interfaces that lack proper sanitization of input data.
The operational impact of this privilege escalation vulnerability is severe and potentially devastating for affected systems. An attacker with limited user-level access could leverage this flaw to gain complete control over the target system, effectively bypassing all standard security controls and access restrictions. Once elevated to kernel mode, the attacker would have unrestricted access to system memory, the ability to modify or delete any file, access all network connections, and potentially establish persistence mechanisms that survive system reboots. This vulnerability could be particularly dangerous in enterprise environments where users might have access to systems running the affected software, as it could enable attackers to move laterally across networks or establish persistent backdoors. The attack surface is further expanded because these drivers operate at the kernel level, meaning that any successful exploitation would be nearly impossible to detect through standard endpoint protection mechanisms.
Mitigation strategies for this vulnerability should focus on immediate patching of the affected software components to versions v3.0.20 or later for the 64-bit driver and v2.14.200 or later for the 32-bit driver. System administrators should implement the principle of least privilege by restricting user access to systems running vulnerable software and monitoring for unusual network activity or system behavior that might indicate exploitation attempts. Additionally, implementing kernel-mode protection mechanisms such as driver signature enforcement, exploit protection policies, and kernel address space layout randomization can help reduce the effectiveness of exploitation attempts. Organizations should also consider deploying network-based intrusion detection systems that can identify suspicious traffic patterns associated with exploitation attempts and establish comprehensive monitoring procedures for detecting unauthorized privilege escalation activities. The vulnerability's classification under the ATT&CK framework would align with techniques such as privilege escalation through kernel exploits and the use of trusted system processes for malicious purposes, emphasizing the need for layered defensive strategies that address both endpoint protection and network monitoring capabilities.