CVE-2020-25218 : Security Advisory and Response

Grandstream GRP261x VoIP phone running firmware version 1.0.3.6 (Base) allow Authentication Bypass in its administrative web interface.

Understanding CVE-2020-25218

Grandstream GRP261x VoIP phone firmware vulnerability

What is CVE-2020-25218?

This CVE refers to an Authentication Bypass vulnerability in the administrative web interface of Grandstream GRP261x VoIP phones running firmware version 1.0.3.6 (Base).

The Impact of CVE-2020-25218

Unauthorized users may gain access to sensitive information or perform malicious actions on the affected device.

Technical Details of CVE-2020-25218

Details of the vulnerability

Vulnerability Description

Vulnerability Type: Authentication Bypass
Affected Device: Grandstream GRP261x VoIP phone
Affected Firmware Version: 1.0.3.6 (Base)

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Affected Version: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability to bypass authentication and gain unauthorized access to the administrative web interface of the VoIP phone.

Mitigation and Prevention

Protecting against CVE-2020-25218

Immediate Steps to Take

Update the firmware to the latest version provided by Grandstream to patch the vulnerability.
Restrict access to the administrative interface to authorized users only.

Long-Term Security Practices

Regularly monitor for security updates and patches from the vendor.
Implement strong password policies and multi-factor authentication to enhance security.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply security patches and updates promptly to ensure the device is protected against known vulnerabilities.