CVE-2017-8408 : Security Advisory and Response

A vulnerability has been discovered in D-Link DCS-1130 devices that could lead to command injection due to mishandling of GET parameters. The issue affects the device's SMB folder setup functionality, potentially allowing unauthorized commands to be executed on the system.

Understanding CVE-2017-8408

This CVE entry highlights a security flaw in D-Link DCS-1130 devices that could be exploited for command injection.

What is CVE-2017-8408?

The vulnerability in D-Link DCS-1130 devices arises from the misinterpretation of GET parameters as commands for a "system" API, potentially enabling command injection attacks.

The Impact of CVE-2017-8408

The vulnerability could allow malicious actors to execute unauthorized commands on the affected devices, compromising their security and integrity.

Technical Details of CVE-2017-8408

This section delves into the technical aspects of the CVE, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability stems from the mishandling of GET parameters in the SMB folder setup functionality, leading to command injection through a specific function on the D-Link DCS-1130 devices.

Affected Systems and Versions

Product: D-Link DCS-1130
Vendor: D-Link
Versions: All versions are affected

Exploitation Mechanism

GET parameters used to test SMB credentials and hostname are mistakenly interpreted as commands for a "system" API
The vulnerable function "sub_7EAFC" in the "cgibox" binary processes values from the GET request, potentially allowing for command injection
Analysis of firmware using tools like binwalk reveals the vulnerable system API call

Mitigation and Prevention

Protecting systems from CVE-2017-8408 involves immediate steps and long-term security practices.

Immediate Steps to Take

Disable SMB folder setup functionality if not essential
Implement network segmentation to limit access to vulnerable devices
Monitor network traffic for suspicious activities

Long-Term Security Practices

Regularly update firmware to patch known vulnerabilities
Conduct security assessments and penetration testing to identify and address weaknesses
Educate users on secure configuration practices and potential risks

Patching and Updates

Apply firmware updates provided by D-Link to address the vulnerability
Stay informed about security advisories and patches released by the vendor