CVE-2022-40068 : Security Advisory and Response

A buffer overflow vulnerability has been discovered in Tenda AC21 V16.03.08.15, specifically through the /bin/httpd function: formSetQosBand.

Understanding CVE-2022-40068

This CVE affects Tenda AC21 V16.03.08.15 with a critical buffer overflow vulnerability.

What is CVE-2022-40068?

Tenda AC21 V16.03.08.15 is vulnerable to buffer overflow via the /bin/httpd function: formSetQosBand.

The Impact of CVE-2022-40068

The vulnerability can allow remote attackers to execute arbitrary code or crash the service, potentially leading to a denial of service (DoS) condition.

Technical Details of CVE-2022-40068

The technical details include:

Vulnerability Description

Tenda AC21 V16.03.08.15 is vulnerable to a buffer overflow when processing certain requests through the /bin/httpd function: formSetQosBand.

Affected Systems and Versions

The vulnerability affects Tenda AC21 routers running version V16.03.08.15.

Exploitation Mechanism

Remote attackers can exploit this vulnerability by sending specially crafted requests to the affected /bin/httpd function, leading to a buffer overflow condition.

Mitigation and Prevention

To mitigate the risks associated with CVE-2022-40068, consider the following steps:

Immediate Steps to Take

Disable remote access to the affected /bin/httpd function, if possible.
Monitor network traffic for any signs of exploitation attempts.

Long-Term Security Practices

Regularly update the firmware of Tenda AC21 routers to the latest version.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Contact Tenda or visit the provided reference link for patches or updates addressing the buffer overflow vulnerability.