CVE-2018-19988 : Security Advisory and Response

This CVE involves vulnerabilities in the /HNAP1/SetClientInfoDemo message affecting D-Link DIR-868L Rev.B 2.05B02 devices due to issues in the AudioMute and AudioEnable parameters.

Understanding CVE-2018-19988

This CVE highlights a command injection vulnerability in the SetClientInfoDemo.php source code.

What is CVE-2018-19988?

The /HNAP1/SetClientInfoDemo message contains vulnerabilities in the AudioMute and AudioEnable parameters, allowing for command injection on affected devices.

The Impact of CVE-2018-19988

The vulnerabilities can be exploited to execute arbitrary commands on the D-Link DIR-868L Rev.B 2.05B02 devices, compromising their security.

Technical Details of CVE-2018-19988

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

Vulnerability Description

The AudioMute and AudioEnable parameters in the SetClientInfoDemo.php source code are stored without regex checking, leading to command injection.

Affected Systems and Versions

D-Link DIR-868L Rev.B 2.05B02 devices

Exploitation Mechanism

The vulnerabilities allow for command injection by bypassing the wget command option with a single quote.
A vulnerable /HNAP1/SetClientInfoDemo XML message may contain single quotes and backquotes in the AudioMute or AudioEnable element.

Mitigation and Prevention

To address CVE-2018-19988, follow these mitigation strategies:

Immediate Steps to Take

Implement input validation to prevent command injection.
Regularly monitor and update the firmware of affected devices.

Long-Term Security Practices

Conduct regular security assessments and penetration testing.
Educate users on safe browsing habits and security best practices.

Patching and Updates

Apply patches provided by the vendor to fix the vulnerabilities and enhance device security.