CVE-2019-3917 : Vulnerability Insights and Analysis

CVE-2019-3917 was published on February 27, 2019, and affects the Alcatel Lucent I-240W-Q GPON ONT with firmware version 3FE54567BOZJ19. The vulnerability allows unauthorized activation of telnetd on the router through a specially crafted HTTP request.

Understanding CVE-2019-3917

This CVE entry highlights a critical security issue in the Alcatel Lucent GPON ONT device.

What is CVE-2019-3917?

The vulnerability in the Alcatel Lucent I-240W-Q GPON ONT with firmware version 3FE54567BOZJ19 enables a remote attacker to activate telnetd on the router without authentication by sending a specific HTTP request.

The Impact of CVE-2019-3917

Exploiting this vulnerability can lead to unauthorized access to the affected router, potentially compromising the network's security and exposing sensitive information.

Technical Details of CVE-2019-3917

This section delves into the technical aspects of the CVE entry.

Vulnerability Description

The flaw in the Alcatel Lucent I-240W-Q GPON ONT allows an attacker to trigger telnetd activation via a crafted HTTP request, bypassing authentication mechanisms.

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 sending a specifically designed HTTP request to the affected device, enabling unauthorized activation of telnetd.

Mitigation and Prevention

Protecting systems from CVE-2019-3917 requires immediate action and long-term security measures.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Monitor network traffic for any suspicious activity targeting telnet services.
Restrict access to the affected device to trusted entities only.

Long-Term Security Practices

Implement strong network segmentation to limit the impact of potential breaches.
Regularly update firmware and security configurations to mitigate future vulnerabilities.

Patching and Updates

Regularly check for firmware updates and security advisories from the vendor to address known vulnerabilities and enhance system security.