CVE-2020-14473 : Security Advisory and Response

A stack-based buffer overflow vulnerability in Vigor3900, Vigor2960, and Vigor300B with firmware before 1.5.1.1.

Understanding CVE-2020-14473

This CVE involves a critical vulnerability in specific Draytek routers that could be exploited by attackers.

What is CVE-2020-14473?

The CVE-2020-14473 is a stack-based buffer overflow vulnerability found in Vigor3900, Vigor2960, and Vigor300B routers running firmware versions prior to 1.5.1.1.

The Impact of CVE-2020-14473

This vulnerability could allow remote attackers to execute arbitrary code or cause a denial of service (DoS) condition on the affected routers.

Technical Details of CVE-2020-14473

The technical aspects of the CVE-2020-14473 vulnerability are as follows:

Vulnerability Description

The vulnerability is due to improper validation of user-supplied input by the affected routers, leading to a stack-based buffer overflow.

Affected Systems and Versions

Vigor3900, Vigor2960, and Vigor300B routers
Firmware versions before 1.5.1.1

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted requests to the targeted routers, potentially resulting in the execution of malicious code or a system crash.

Mitigation and Prevention

To address CVE-2020-14473 and enhance security, consider the following mitigation strategies:

Immediate Steps to Take

Update the firmware of the affected routers to version 1.5.1.1 or later.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity targeting the vulnerable devices.

Long-Term Security Practices

Regularly update firmware and security patches on all network devices.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security advisories from Draytek and apply patches promptly to protect against known vulnerabilities.