CVE-2019-7388 : Security Advisory and Response

A vulnerability has been found in the /bin/goahead component on D-Link DIR-823G devices running firmware version 1.02B03. This vulnerability allows remote attackers to access sensitive information without authentication.

Understanding CVE-2019-7388

This CVE identifies a security flaw in D-Link DIR-823G devices that can be exploited by attackers to retrieve confidential data.

What is CVE-2019-7388?

CVE-2019-7388 is a vulnerability in the GetClientInfo HNAP API of D-Link DIR-823G devices, enabling unauthorized access to MAC addresses of connected clients.

The Impact of CVE-2019-7388

The vulnerability permits remote attackers to obtain sensitive information, including MAC addresses, of all clients connected to the WLAN without requiring authentication.

Technical Details of CVE-2019-7388

This section provides in-depth technical insights into the vulnerability.

Vulnerability Description

The issue arises from incorrect access control in /bin/goahead on D-Link DIR-823G devices with firmware 1.02B03, allowing unauthorized access to client information via the GetClientInfo HNAP API.

Affected Systems and Versions

Affected Component: /bin/goahead
Affected Device: D-Link DIR-823G
Firmware Version: 1.02B03

Exploitation Mechanism

Remote attackers exploit the vulnerability by sending crafted requests to the GetClientInfo HNAP API, enabling them to retrieve MAC addresses of all WLAN clients.

Mitigation and Prevention

Protecting systems from CVE-2019-7388 requires immediate actions and long-term security measures.

Immediate Steps to Take

Disable remote access to vulnerable devices if not required.
Implement network segmentation to limit access to sensitive information.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware to patch known vulnerabilities.
Conduct security audits to identify and address potential weaknesses.
Educate users on secure practices to prevent unauthorized access.

Patching and Updates

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