CVE-2018-20219 : Exploit Details and Defense Strategies

A vulnerability has been identified in Teracue ENC-400 devices running firmware versions 2.56 and below, allowing attackers to bypass authentication.

Understanding CVE-2018-20219

This CVE involves a hardcoded authentication token in Teracue ENC-400 devices, enabling unauthorized access to the web administration panel.

What is CVE-2018-20219?

The vulnerability in Teracue ENC-400 devices allows attackers to maintain access without knowing the password, by exploiting a static authentication token.

The Impact of CVE-2018-20219

The hardcoded token in the source code poses a significant risk as it grants unauthorized access to the device, even if the password is changed.

Technical Details of CVE-2018-20219

This section provides in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability exists in Teracue ENC-400 devices with firmware versions 2.56 and below.
After successful authentication, the device sends a hardcoded authentication cookie to users.
The token is stored in the /usr/share/www/check.lp file, allowing attackers to bypass authentication.

Affected Systems and Versions

Teracue ENC-400 devices with firmware versions 2.56 and below are affected.

Exploitation Mechanism

Attackers can exploit the hardcoded token to access the web administration panel without the need for a password.

Mitigation and Prevention

Protecting systems from CVE-2018-20219 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable remote access to the affected devices if possible.
Monitor network traffic for any suspicious activities.
Apply security patches or updates provided by the vendor.

Long-Term Security Practices

Implement strong password policies and regular password changes.
Conduct regular security audits and vulnerability assessments.

Patching and Updates

Ensure that the Teracue ENC-400 devices are updated with the latest firmware to address the vulnerability.