CVE-2019-20215 : What You Need to Know

D-Link DIR-859 1.05 and 1.06B01 Beta01 devices are vulnerable to remote attackers executing unauthorized operating system commands.

Understanding CVE-2019-20215

This CVE involves a vulnerability in D-Link DIR-859 routers that allows attackers to run unauthorized commands remotely.

What is CVE-2019-20215?

The vulnerability in D-Link DIR-859 routers enables remote attackers to execute unauthorized operating system commands by manipulating specific functions.

The Impact of CVE-2019-20215

The vulnerability allows attackers to run arbitrary commands on affected devices, potentially leading to unauthorized access and control.

Technical Details of CVE-2019-20215

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability arises from mishandling the HTTP_ST parameter, allowing attackers to concatenate arbitrary commands using shell metacharacters.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specific request to the M-SEARCH method in ssdpcgi() located in /htdocs/cgibin.

Mitigation and Prevention

Protecting systems from CVE-2019-20215 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the firmware of D-Link DIR-859 routers to the latest version provided by the vendor.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch all network devices and systems.
Conduct security assessments and penetration testing to identify vulnerabilities.
Educate users and administrators about safe browsing habits and security best practices.

Patching and Updates

Stay informed about security advisories and updates from D-Link.
Apply patches promptly to address known vulnerabilities and enhance system security.