CVE-2022-25215 in Phicomm
Summary
by MITRE • 03/10/2022
Improper access control on the LocalMACConfig.asp interface allows an unauthenticated remote attacker to add (or remove) client MAC addresses to (or from) a list of banned hosts. Clients with those MAC addresses are then prevented from accessing either the WAN or the router itself.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 03/13/2022
This vulnerability exists within the LocalMACConfig.asp web interface of certain networking devices, representing a critical access control flaw that undermines the security posture of the affected systems. The issue stems from inadequate authentication mechanisms that permit any remote attacker to manipulate the MAC address filtering configuration without proper authorization. The vulnerability specifically affects the LocalMACConfig.asp interface which serves as a management endpoint for configuring banned host lists, allowing unauthorized modifications to the device's access control policies.
The technical implementation of this flaw demonstrates a classic improper access control vulnerability classified under CWE-285, where the application fails to properly verify the identity of users attempting to perform administrative operations. The interface accepts requests to add or remove MAC addresses from the banned hosts list without requiring authentication credentials, effectively bypassing the intended security controls. This misconfiguration enables attackers to manipulate the device's network access policies remotely, creating a persistent threat vector that can be exploited from any network location.
The operational impact of this vulnerability is significant as it provides attackers with the ability to perform both denial-of-service and access control manipulation attacks against the affected network infrastructure. An attacker can systematically ban legitimate client MAC addresses, effectively preventing authorized users from accessing either the local network or the router itself, while simultaneously gaining the capability to add malicious MAC addresses to bypass existing controls. This creates a scenario where network administrators lose control over device access policies, potentially leading to complete network isolation of authorized users or unauthorized access to network resources.
The attack surface is particularly concerning as it operates entirely over the network without requiring physical access or prior credentials, making it an attractive target for remote exploitation. According to ATT&CK framework, this vulnerability maps to T1078 Valid Accounts and T1566 Phishing, as attackers can leverage this weakness to maintain persistent access or gain initial foothold in network environments. The vulnerability also aligns with T1190 Exploit Public-Facing Application, as it represents a publicly accessible interface that can be targeted without specialized knowledge or tools beyond basic network reconnaissance.
Mitigation strategies should focus on implementing proper authentication controls for all administrative interfaces, including enforcing strong authentication mechanisms such as multi-factor authentication and role-based access controls. Network segmentation and firewall rules should be implemented to restrict access to management interfaces to authorized administrative networks only. Regular security audits and vulnerability assessments should be conducted to identify similar access control flaws in other network management interfaces. Additionally, implementing network monitoring solutions that can detect unauthorized modifications to access control policies will help in identifying potential exploitation attempts. Device vendors should ensure that all administrative interfaces require proper authentication before allowing configuration changes, and that default configurations do not expose management interfaces to untrusted networks. The vulnerability highlights the importance of principle of least privilege and demonstrates how simple authentication failures can lead to severe operational impacts in network security infrastructure.