CVE-2021-44246 Explained : Impact and Mitigation

Totolink devices A3100R, A830R, and A720R are affected by a stack overflow vulnerability in the setNoticeCfg function, potentially leading to a Denial of Service (DoS) attack.

Understanding CVE-2021-44246

The vulnerability in Totolink devices can be exploited to trigger a DoS attack by manipulating the IpTo parameter.

What is CVE-2021-44246?

This CVE identifies a stack overflow vulnerability in Totolink devices, allowing an attacker to execute a DoS attack via the IpTo parameter.

The Impact of CVE-2021-44246

Attackers can exploit this vulnerability to cause a Denial of Service (DoS) condition on affected devices.

Technical Details of CVE-2021-44246

The following details outline the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability exists in the setNoticeCfg function of Totolink devices A3100R, A830R, and A720R, enabling a stack overflow.

Affected Systems and Versions

Totolink A3100R v4.1.2cu.5050_B20200504
Totolink A830R v5.9c.4729_B20191112
Totolink A720R v4.1.5cu.470_B20200911

Exploitation Mechanism

The vulnerability can be exploited by attackers through the manipulation of the IpTo parameter.

Mitigation and Prevention

Protect your systems from CVE-2021-44246 with these mitigation strategies:

Immediate Steps to Take

Disable remote access to the affected devices if not required.
Implement network-level access control lists to limit access to vulnerable services.
Regularly monitor and analyze network traffic for any suspicious activities.

Long-Term Security Practices

Conduct regular security assessments and penetration testing of your network infrastructure.
Keep software and firmware up to date to address known vulnerabilities.
Educate users and administrators about safe cybersecurity practices.

Patching and Updates

Ensure you apply vendor-supplied patches and updates promptly to remediate the vulnerability.