CVE-2019-3920 : What You Need to Know

An authentication flaw in the Alcatel Lucent I-240W-Q GPON ONT with firmware version 3FE54567BOZJ19 allows attackers to execute arbitrary commands via a crafted HTTP request.

Understanding CVE-2019-3920

This CVE involves an authentication bypass vulnerability in a specific GPON ONT device.

What is CVE-2019-3920?

The CVE-2019-3920 vulnerability is an authentication flaw found in the Alcatel Lucent I-240W-Q GPON ONT with firmware version 3FE54567BOZJ19. It enables authenticated attackers to execute arbitrary commands by sending a carefully crafted HTTP request.

The Impact of CVE-2019-3920

The vulnerability allows authenticated attackers to run arbitrary commands on the affected device, potentially leading to unauthorized access, data theft, or further compromise of the system.

Technical Details of CVE-2019-3920

This section provides more technical insights into the CVE.

Vulnerability Description

The Alcatel Lucent I-240W-Q GPON ONT using firmware version 3FE54567BOZJ19 is susceptible to authenticated command injection through a crafted HTTP request sent by a remote, authenticated attacker.

Affected Systems and Versions

Product: Alcatel Lucent I-240W-Q GPON ONT
Vendor: Tenable
Firmware Version: 3FE54567BOZJ19

Exploitation Mechanism

The vulnerability can be exploited by authenticated attackers sending a specifically designed HTTP request to /GponForm/device_Form?script/ to execute unauthorized commands.

Mitigation and Prevention

Protecting systems from CVE-2019-3920 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Monitor network traffic for any suspicious activity related to the vulnerability.
Restrict access to vulnerable devices to authorized personnel only.

Long-Term Security Practices

Regularly update firmware and software to mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address potential weaknesses.
Educate users and administrators about secure practices to prevent exploitation of vulnerabilities.

Patching and Updates

Regularly check for updates and patches released by the vendor to address the CVE-2019-3920 vulnerability.