CVE-2019-3921 Explained : Impact and Mitigation
Learn about CVE-2019-3921, a critical stack buffer overflow vulnerability in Alcatel Lucent I-240W-Q GPON ONT firmware version 3FE54567BOZJ19, allowing remote attackers to execute arbitrary code.
A security vulnerability has been identified in the Alcatel Lucent I-240W-Q GPON ONT device, affecting firmware version 3FE54567BOZJ19. The vulnerability allows for a stack buffer overflow, potentially enabling remote attackers to execute arbitrary code on the device.
Understanding CVE-2019-3921
This CVE entry details a critical security issue in the Alcatel Lucent I-240W-Q GPON ONT device.
What is CVE-2019-3921?
The CVE-2019-3921 vulnerability is a stack buffer overflow in the Alcatel Lucent I-240W-Q GPON ONT device's firmware version 3FE54567BOZJ19. It can be exploited by authenticated remote attackers through a specially crafted HTTP POST request.
The Impact of CVE-2019-3921
Exploiting this vulnerability may allow attackers to execute arbitrary code on the affected device, potentially leading to unauthorized access and control.
Technical Details of CVE-2019-3921
This section provides more in-depth technical information about the CVE-2019-3921 vulnerability.
Vulnerability Description
The vulnerability in the Alcatel Lucent I-240W-Q GPON ONT device arises from a stack buffer overflow triggered by a specific HTTP POST request to the /GponForm/usb_Form?script/ endpoint.
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 remote attackers sending a crafted HTTP POST request to the /GponForm/usb_Form?script/ endpoint, potentially leading to arbitrary code execution.
Mitigation and Prevention
To address and prevent the CVE-2019-3921 vulnerability, follow these steps:
Immediate Steps to Take
- Apply vendor-supplied patches or updates promptly.
- Monitor network traffic for any suspicious activity targeting the affected device.
Long-Term Security Practices
- Regularly update firmware and software to mitigate known vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
- Stay informed about security advisories from the vendor and apply patches as soon as they are available.