CVE-2025-34151 in M300 Wi-Fi Repeater
Summary
by MITRE • 08/07/2025
A command injection vulnerability exists in the 'passwd' parameter of the PPPoE setup process on the Shenzhen Aitemi M300 Wi-Fi Repeater (hardware model MT02). The input is passed directly to system-level commands without sanitation, enabling unauthenticated attackers to achieve root-level code execution.
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Analysis
by VulDB Data Team • 08/07/2025
This vulnerability resides within the PPPoE setup functionality of the Shenzhen Aitemi M300 Wi-Fi Repeater model MT02, representing a critical command injection flaw that directly compromises the device's security posture. The vulnerability specifically affects the 'passwd' parameter processing within the PPPoE configuration interface, where user input flows unchecked into system-level command execution contexts. This design flaw allows attackers to inject malicious commands that are subsequently executed with root privileges, effectively granting full system control over the affected device.
The technical implementation of this vulnerability demonstrates a classic command injection weakness that aligns with CWE-77 and CWE-88, where untrusted data enters a command processing function without proper sanitization or validation. The PPPoE setup process fails to implement input validation controls, allowing attackers to manipulate the password parameter to execute arbitrary shell commands through direct system call invocations. This vulnerability exists at the intersection of insecure input handling and privilege escalation, as the system processes user-supplied data without proper sanitization before incorporating it into system commands.
The operational impact of this vulnerability is severe and far-reaching, as it enables unauthenticated remote code execution with root privileges on the affected wireless repeater device. An attacker can exploit this flaw to gain complete control over the device's operating system, potentially using it as a pivot point for network reconnaissance and lateral movement. The vulnerability affects the device's core networking functionality, potentially disrupting network services and creating persistent backdoors for malicious actors. The lack of authentication requirements for exploitation makes this particularly dangerous in environments where such devices are deployed without proper network segmentation or monitoring controls.
Mitigation strategies for this vulnerability should focus on immediate input validation and sanitization implementation within the PPPoE setup process. Network administrators should ensure that all user-supplied parameters undergo strict validation and sanitization before being processed by system commands, implementing proper parameter escaping and command composition techniques. The device firmware should be updated to prevent direct command injection by using safe API calls or command libraries that properly handle user input. Additionally, network segmentation and monitoring controls should be implemented to detect anomalous command execution patterns, while regular security audits should verify that similar vulnerabilities do not exist in other device components. Organizations should also consider implementing network access controls to limit exposure of such devices to untrusted networks and ensure that default credentials are changed immediately upon device deployment. The vulnerability demonstrates the critical importance of input validation in embedded systems and aligns with ATT&CK technique T1059 for command and scripting interpreter, specifically targeting the execution of system commands through vulnerable interfaces.