CVE-2018-19986 Explained : Impact and Mitigation

This CVE involves a vulnerability in the RemotePort parameter of the /HNAP1/SetRouterSettings message, impacting D-Link DIR-818LW Rev.A 2.05.B03 and DIR-822 B1 202KRb06 devices.

Understanding CVE-2018-19986

This CVE highlights a security flaw in how certain parameters are handled within specific D-Link devices.

What is CVE-2018-19986?

The vulnerability lies in the RemotePort parameter of the /HNAP1/SetRouterSettings message, potentially allowing for the injection of shell metacharacters.

The Impact of CVE-2018-19986

The vulnerability affects D-Link DIR-818LW Rev.A 2.05.B03 and DIR-822 B1 202KRb06 devices, potentially leading to unauthorized access or malicious commands execution.

Technical Details of CVE-2018-19986

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The RemotePort parameter in the /HNAP1/SetRouterSettings message is susceptible to shell metacharacter injection, posing a security risk for the affected D-Link devices.

Affected Systems and Versions

D-Link DIR-818LW Rev.A 2.05.B03
D-Link DIR-822 B1 202KRb06

Exploitation Mechanism

The vulnerability allows attackers to potentially inject malicious shell metacharacters into the RemotePort element, compromising the affected devices.

Mitigation and Prevention

Protecting systems from this vulnerability is crucial to maintaining security.

Immediate Steps to Take

Implement firewall rules to restrict unauthorized access to vulnerable services.
Regularly monitor network traffic for any suspicious activity.

Long-Term Security Practices

Conduct regular security audits and penetration testing to identify and address vulnerabilities.
Keep systems and firmware up to date to patch known security issues.
Educate users on safe browsing habits and the importance of cybersecurity.

Patching and Updates

Ensure that the affected D-Link devices are updated with the latest firmware releases to mitigate the vulnerability.