CVE-2017-18046 Explained : Impact and Mitigation

A buffer overflow vulnerability has been discovered on the Dasan GPON ONT WiFi Router H640X versions 12.02-01121 2.77p1-1124 and 3.03p2-1146, allowing remote code execution via a crafted POST request.

Understanding CVE-2017-18046

This CVE identifies a critical buffer overflow vulnerability in the Dasan GPON ONT WiFi Router H640X.

What is CVE-2017-18046?

The vulnerability allows attackers to execute arbitrary code remotely by sending a specially crafted POST request to the login_action function in the /cgi-bin/login_action.cgi file.

The Impact of CVE-2017-18046

The exploitation of this vulnerability can lead to unauthorized remote code execution on affected devices, posing a severe security risk.

Technical Details of CVE-2017-18046

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The buffer overflow vulnerability in Dasan GPON ONT WiFi Router H640X versions 12.02-01121 2.77p1-1124 and 3.03p2-1146 allows remote attackers to execute arbitrary code by sending a long POST request to the login_action function.

Affected Systems and Versions

Dasan GPON ONT WiFi Router H640X versions 12.02-01121 2.77p1-1124 and 3.03p2-1146

Exploitation Mechanism

Attackers can exploit this vulnerability by submitting an excessively long POST request to the login_action function in the /cgi-bin/login_action.cgi file.

Mitigation and Prevention

Protecting systems from CVE-2017-18046 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update firmware and software to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.
Educate users on safe browsing habits and the importance of cybersecurity.

Patching and Updates

Ensure all affected devices are updated with the latest firmware and security patches to mitigate the risk of exploitation.