CVE-2020-15893 : Security Advisory and Response

An issue was discovered on D-Link DIR-816L devices 2.x before 1.10b04Beta02, allowing command injection via Universal Plug and Play (UPnP) on port 1900.

Understanding CVE-2020-15893

This CVE identifies a vulnerability in D-Link DIR-816L devices that enables attackers to execute commands through UPnP.

What is CVE-2020-15893?

The vulnerability allows attackers to inject commands by manipulating the Search Target (ST) field in the SSDP M-SEARCH discover packet.

The Impact of CVE-2020-15893

Attackers can exploit this to execute arbitrary commands on affected devices.
Unauthorized access and control of the device may lead to further compromise.

Technical Details of CVE-2020-15893

This section provides more technical insights into the vulnerability.

Vulnerability Description

The issue arises from UPnP being enabled by default on port 1900, allowing for command injection through the ST field.

Affected Systems and Versions

D-Link DIR-816L devices 2.x before version 1.10b04Beta02 are vulnerable.

Exploitation Mechanism

Attackers inject malicious payloads into the ST field of the SSDP M-SEARCH discover packet to execute commands.

Mitigation and Prevention

Protecting systems from CVE-2020-15893 is crucial to prevent unauthorized access and potential compromise.

Immediate Steps to Take

Disable UPnP on the affected devices to mitigate the risk of command injection.
Regularly monitor network traffic for any suspicious activities.

Long-Term Security Practices

Implement network segmentation to isolate critical devices.
Keep devices updated with the latest firmware and security patches.

Patching and Updates

Apply the latest firmware updates provided by D-Link to address this vulnerability.