CVE-2019-13263 : Security Advisory and Response

D-link DIR-825AC G1 devices have a vulnerability that allows encoded data to be transmitted across networks due to inadequate separation between primary and secondary networks.

Understanding CVE-2019-13263

This CVE describes a flaw in D-link DIR-825AC G1 devices that enables the transmission of encoded data across networks.

What is CVE-2019-13263?

The vulnerability in D-link DIR-825AC G1 devices allows for the transmission of encoded data across networks due to insufficient separation between primary and secondary networks.

The Impact of CVE-2019-13263

The vulnerability enables attackers to potentially intercept and manipulate data transmitted across networks, compromising the security and privacy of the affected systems.

Technical Details of CVE-2019-13263

This section provides technical details of the vulnerability in D-link DIR-825AC G1 devices.

Vulnerability Description

The devices lack proper separation between primary and secondary networks, allowing encoded data transmission.

Affected Systems and Versions

Product: D-link DIR-825AC G1
Vendor: D-link
Versions: All versions are affected

Exploitation Mechanism

When a DHCP Request is sent to the router, it contains a specific Transaction ID.
The router mistakenly sends NAK messages to both primary and secondary networks using the same Transaction ID, enabling data transmission.

Mitigation and Prevention

Protecting systems from the CVE-2019-13263 vulnerability requires immediate steps and long-term security practices.

Immediate Steps to Take

Disable guest networks on affected devices if not essential.
Monitor network traffic for any suspicious activities.
Implement network segmentation to isolate critical systems.

Long-Term Security Practices

Regularly update firmware and security patches on the devices.
Conduct security audits and penetration testing to identify vulnerabilities.
Educate users on network security best practices.
Consider implementing network access control and intrusion detection systems.
Stay informed about security advisories and updates from the vendor.

Patching and Updates

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