CVE-2019-7389 : Exploit Details and Defense Strategies

D-Link DIR-823G devices with firmware 1.02B03 have a vulnerability that allows remote attackers to reset the router without authentication, leading to a denial-of-service attack.

Understanding CVE-2019-7389

This CVE involves a flaw in /bin/goahead on D-Link DIR-823G devices.

What is CVE-2019-7389?

This CVE refers to incorrect access control in the SetFactoryDefault HNAP API, enabling unauthorized router resets.

The Impact of CVE-2019-7389

The vulnerability permits attackers to launch denial-of-service attacks without authentication, potentially disrupting network services.

Technical Details of CVE-2019-7389

The technical aspects of this CVE are as follows:

Vulnerability Description

The flaw in /bin/goahead allows unauthorized router resets.

Affected Systems and Versions

Product: D-Link DIR-823G
Firmware Version: 1.02B03

Exploitation Mechanism

Remote attackers exploit the SetFactoryDefault HNAP API to reset the router without authentication.

Mitigation and Prevention

Protect your systems from CVE-2019-7389 with these measures:

Immediate Steps to Take

Disable remote management if not required.
Regularly check for firmware updates from D-Link.

Long-Term Security Practices

Implement strong, unique passwords for router access.
Monitor network traffic for any suspicious activity.

Patching and Updates

Apply firmware updates promptly to address security vulnerabilities.