CVE-2019-20217 : Vulnerability Insights and Analysis

Remote attackers can exploit vulnerabilities in D-Link DIR-859 1.05 and 1.06B01 Beta01 devices to execute unauthorized operating system commands due to mishandling of the SERVER_ID parameter.

Understanding CVE-2019-20217

This CVE involves a vulnerability in D-Link DIR-859 devices that allows attackers to execute unauthorized commands on the system.

What is CVE-2019-20217?

The vulnerability arises from insufficient validation of the urn: service/device value, enabling attackers to concatenate their own commands for execution.

The Impact of CVE-2019-20217

Remote attackers can execute unauthorized operating system commands on affected devices.

Technical Details of CVE-2019-20217

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in D-Link DIR-859 devices allows remote attackers to execute arbitrary OS commands via the urn: to the M-SEARCH method in ssdpcgi() in /htdocs/cgibin.

Affected Systems and Versions

D-Link DIR-859 1.05 and 1.06B01 Beta01 devices

Exploitation Mechanism

Attackers exploit the vulnerability by manipulating the urn: service/device value to concatenate arbitrary commands separated by shell metacharacters.

Mitigation and Prevention

Protecting systems from CVE-2019-20217 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected D-Link DIR-859 devices to the latest firmware version.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly monitor and audit network traffic for any suspicious activities.
Educate users on safe browsing habits and the importance of cybersecurity.

Patching and Updates

Stay informed about security updates and patches released by D-Link for the DIR-859 devices.