CVE-2020-19323 : Security Advisory and Response

CVE-2020-19323 is a published vulnerability affecting D-Link DIR-619L 2.06beta devices, allowing remote attackers to restart the router via a heap buffer overflow in /bin/mini_upnpd.

Understanding CVE-2020-19323

This CVE identifies a critical security issue in D-Link DIR-619L 2.06beta devices that can be exploited remotely without authentication.

What is CVE-2020-19323?

The vulnerability in /bin/mini_upnpd on D-Link DIR-619L 2.06beta devices enables remote attackers to trigger a heap buffer overflow by sending a specially crafted M-search request with the ST parameter, leading to a router restart.

The Impact of CVE-2020-19323

The exploitation of this vulnerability can result in unauthorized access to the router, disruption of network services, and potential exposure of sensitive information.

Technical Details of CVE-2020-19323

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability is a heap buffer overflow in /bin/mini_upnpd on D-Link DIR-619L 2.06beta devices, allowing remote attackers to restart the router via a crafted M-search request.

Affected Systems and Versions

Vendor: D-Link
Product: DIR-619L
Version: 2.06beta
Status: Affected

Exploitation Mechanism

The vulnerability can be exploited remotely by sending a malicious M-search request with the ST parameter, triggering a heap buffer overflow and causing the router to restart.

Mitigation and Prevention

Protecting systems from CVE-2020-19323 requires immediate action and long-term security measures.

Immediate Steps to Take

Disable UPnP services on the affected devices if possible.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and apply security patches provided by the vendor.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Check the D-Link security bulletin for patches and updates to address CVE-2020-19323.