CVE-2021-45741 Explained : Impact and Mitigation

TOTOLINK X5000R v9.1.0u.6118_B20201102 contains a stack overflow vulnerability in the setIpv6Cfg function, allowing attackers to launch a DoS attack through relay6to4 parameters.

Understanding CVE-2021-45741

This CVE describes a specific vulnerability found in the TOTOLINK X5000R router that could lead to a Denial of Service (DoS) attack.

What is CVE-2021-45741?

The CVE-2021-45741 vulnerability is present in the TOTOLINK X5000R router's software version v9.1.0u.6118_B20201102, characterized by a stack overflow within the setIpv6Cfg function.

The Impact of CVE-2021-45741

This vulnerability allows malicious actors to exploit relay6to4 parameters, potentially resulting in a DoS attack on the affected device.

Technical Details of CVE-2021-45741

Investigate the technical aspects of this CVE to understand its implications.

Vulnerability Description

The vulnerability in the TOTOLINK X5000R router allows attackers to trigger a stack overflow by manipulating the setIpv6Cfg function, enabling a DoS attack.

Affected Systems and Versions

Affected System: TOTOLINK X5000R router v9.1.0u.6118_B20201102
Affected Version: v9.1.0u.6118_B20201102

Exploitation Mechanism

The attack vector involves exploiting the relay6to4 parameters, utilizing the vulnerability in the setIpv6Cfg function to destabilize the system.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-45741.

Immediate Steps to Take

Update the TOTOLINK X5000R router to the latest firmware version to patch the vulnerability.
Implement network segmentation to limit the impact of a potential DoS attack.

Long-Term Security Practices

Regularly monitor for security updates from TOTOLINK and apply them promptly.
Conduct security assessments to identify and address vulnerabilities proactively.

Patching and Updates

Ensure the timely application of firmware updates and security patches to safeguard against known vulnerabilities.