CVE-2022-25989 in Eufy Homebase
Summary
by MITRE • 05/05/2022
An authentication bypass vulnerability exists in the libxm_av.so getpeermac() functionality of Anker Eufy Homebase 2 2.1.8.5h. A specially-crafted DHCP packet can lead to authentication bypass. An attacker can DHCP poison to trigger this vulnerability.
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Analysis
by VulDB Data Team • 05/08/2022
The vulnerability identified as CVE-2022-25989 represents a critical authentication bypass flaw within the Anker Eufy Homebase 2 security system firmware version 2.1.8.5h. This weakness specifically affects the libxm_av.so library's getpeermac() function, which is responsible for handling network communications and device authentication within the home security ecosystem. The vulnerability stems from insufficient validation of DHCP responses, allowing malicious actors to manipulate the network authentication process through carefully crafted DHCP packets that can bypass the device's security controls.
This authentication bypass vulnerability operates through a DHCP poisoning attack vector where an attacker positioned within the same network segment can inject falsified DHCP responses to the Homebase 2 device. The flaw lies in the improper handling of peer MAC address verification during network communication establishment, creating a pathway for unauthorized access to the device's administrative interfaces and security features. The attack requires the adversary to be within the same broadcast domain as the target device, making it a local network-level threat that can be executed by anyone with access to the physical or logical network segment.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete compromise of the home security system. An attacker who successfully exploits this vulnerability could gain full administrative control over the Eufy Homebase 2, enabling them to view live camera feeds, access recorded video footage, modify device settings, disable security alerts, and potentially control connected smart home devices. This represents a significant risk to user privacy and home security, as the attacker could effectively become an unauthorized administrator without proper credentials or authentication.
From a cybersecurity framework perspective, this vulnerability maps to CWE-287 which addresses improper authentication issues, and aligns with ATT&CK technique T1078.002 for valid accounts using default passwords or credential reuse. The flaw demonstrates poor input validation and authentication mechanisms within the network stack implementation. Organizations should implement network segmentation to isolate security devices from general network traffic, deploy DHCP snooping and dynamic ARP inspection to prevent malicious DHCP responses, and ensure firmware updates are applied promptly. Additionally, network monitoring solutions should be configured to detect anomalous DHCP traffic patterns that might indicate exploitation attempts. The vulnerability highlights the importance of secure network protocol implementation and proper authentication flow validation in IoT devices.