CVE-2021-46263 : Security Advisory and Response

Tenda AC Series Router AC11_V02.03.01.104_CN has a stack buffer overflow vulnerability in the wifiTime module, allowing attackers to cause a Denial of Service (DoS).

Understanding CVE-2021-46263

This CVE involves a critical vulnerability in Tenda AC Series Router AC11_V02.03.01.104_CN that can lead to a DoS attack.

What is CVE-2021-46263?

The vulnerability in the wifiTime module of the Tenda router permits attackers to execute a DoS attack by sending crafted overflow data.

The Impact of CVE-2021-46263

Exploitation of this vulnerability can result in a Denial of Service, disrupting network availability and functionality.

Technical Details of CVE-2021-46263

This section provides in-depth technical insights into the vulnerability.

Vulnerability Description

The stack buffer overflow in the wifiTime module allows attackers to disrupt the router's operation through specifically crafted data.

Affected Systems and Versions

Affected System: Tenda AC Series Router AC11_V02.03.01.104_CN
Affected Version: Not specified

Exploitation Mechanism

Attackers can exploit this vulnerability by sending malicious overflow data to the wifiTime module, leading to a DoS condition.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate action and long-term security practices.

Immediate Steps to Take

Update the router firmware to the latest version provided by the vendor.
Implement firewall rules to restrict unauthorized access to the router.

Long-Term Security Practices

Regularly monitor network traffic for any anomalies that could indicate an ongoing attack.
Conduct security audits and penetration testing to identify and address potential vulnerabilities.

Patching and Updates

Apply patches and updates from the vendor promptly to address this vulnerability.