CVE-2020-29376 Explained : Impact and Mitigation

An issue was discovered on V-SOL OLT devices with hardcoded credentials for the admin account to authenticate to the TELNET service.

Understanding CVE-2020-29376

This CVE identifies a vulnerability in V-SOL OLT devices that could allow unauthorized access to the TELNET service.

What is CVE-2020-29376?

The vulnerability involves the presence of a hardcoded password for the admin account on various V-SOL OLT device versions.

The Impact of CVE-2020-29376

The hardcoded password issue poses a significant security risk as it allows unauthorized users to gain access to the TELNET service on affected devices.

Technical Details of CVE-2020-29376

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability involves the presence of a hardcoded password for the admin account on V-SOL V1600D, V1600D4L, V1600D-MINI, V1600G1, and V1600G2 OLT devices.

Affected Systems and Versions

V-SOL V1600D: V2.03.69 and V2.03.57
V-SOL V1600D4L: V1.01.49
V-SOL V1600D-MINI: V1.01.48
V-SOL V1600G1: V2.0.7 and V1.9.7
V-SOL V1600G2: V1.1.4

Exploitation Mechanism

Unauthorized users can exploit this vulnerability by using the hardcoded password to gain unauthorized access to the TELNET service on the affected devices.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.

Immediate Steps to Take

Change the default admin password on the affected V-SOL OLT devices.
Disable TELNET service if not required for operations.

Long-Term Security Practices

Implement strong password policies and regular password changes.
Monitor network traffic for any unauthorized access attempts.

Patching and Updates

Contact the vendor for patches or updates to address the hardcoded password issue on the affected V-SOL OLT devices.