CVE-2018-19300 : What You Need to Know

This CVE-2018-19300 article provides insights into a critical vulnerability affecting various D-Link devices, allowing unauthorized shell command execution.

Understanding CVE-2018-19300

What is CVE-2018-19300?

Before firmware version 1.06b01, several D-Link devices had a vulnerability that could be exploited by attackers to execute unauthorized shell commands.

The Impact of CVE-2018-19300

The vulnerability allows attackers to execute unauthorized shell commands in the root context of affected D-Link devices, potentially compromising their security.

Technical Details of CVE-2018-19300

Vulnerability Description

The vulnerability exists in devices like DAP-1530, DAP-1610, DWR-111, DWR-116, DWR-512, DWR-711, DWR-712, DWR-921, and more, due to the presence of a file named EXCU_SHELL in the web directory.

Affected Systems and Versions

Devices affected include DAP-1530 (A1), DAP-1610 (A1), DWR-111 (A1), DWR-116 (A1), DWR-512 (B1), DWR-711 (A1), DWR-712 (B1), DWR-921 (A1), and DWR-921 (B1) before specific firmware versions.

Exploitation Mechanism

By sending a GET request to the /EXCU_SHELL URI with specially crafted headers, attackers can execute unauthorized shell commands on the affected devices.

Mitigation and Prevention

Immediate Steps to Take

Update the firmware of affected devices to versions that address the vulnerability.
Monitor network traffic for any suspicious activities.
Restrict access to vulnerable devices.

Long-Term Security Practices

Regularly update firmware and security patches.
Implement network segmentation to limit the impact of potential breaches.

Patching and Updates

Ensure that all D-Link devices are running the latest firmware versions that have patched the vulnerability.