CVE-2018-19990 : What You Need to Know

A vulnerability in the WPSPIN parameter of the /HNAP1/SetWiFiVerifyAlpha message affects D-Link DIR-822 B1 202KRb06 devices, potentially allowing for the insertion of shell metacharacters.

Understanding CVE-2018-19990

This CVE entry highlights a security issue related to the handling of the WPSPIN parameter in specific D-Link devices.

What is CVE-2018-19990?

The vulnerability lies in the improper storage and usage of the WPSPIN parameter within certain PHP source code files, leading to a potential security risk.

The Impact of CVE-2018-19990

The vulnerability could permit malicious actors to inject shell metacharacters into XML messages, compromising the integrity and security of affected devices.

Technical Details of CVE-2018-19990

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The issue stems from the insecure storage and utilization of the WPSPIN parameter in specific PHP source code files, enabling the insertion of malicious shell metacharacters.

Affected Systems and Versions

D-Link DIR-822 B1 202KRb06 devices

Exploitation Mechanism

The vulnerability allows for the insertion of shell metacharacters within the WPSPIN element of /HNAP1/SetWiFiVerifyAlpha XML messages.

Mitigation and Prevention

Protective measures to address and prevent exploitation of the vulnerability.

Immediate Steps to Take

Implement regex checking for the WPSPIN parameter in the affected PHP source code files.
Monitor and filter input data to prevent the insertion of malicious shell metacharacters.

Long-Term Security Practices

Regularly update and patch the firmware of D-Link DIR-822 B1 202KRb06 devices.
Conduct security audits and assessments to identify and mitigate similar vulnerabilities.

Patching and Updates

Apply patches and updates provided by D-Link to address the vulnerability.