CVE-2022-28556 Explained : Impact and Mitigation

This article provides an overview of CVE-2022-28556, a vulnerability found in Tenda AC15 US_AC15V1.0BR_V15.03.05.20_multi_TDE01.bin that exposes the device to buffer overflow attacks.

Understanding CVE-2022-28556

CVE-2022-28556 is a vulnerability in Tenda AC15 US_AC15V1.0BR_V15.03.05.20_multi_TDE01.bin that can be exploited through the /goform/setpptpservercfg interface of the web.

What is CVE-2022-28556?

The vulnerability allows attackers to trigger a stack overflow by sending malicious post data values for startip and endip, leading to a potential security breach.

The Impact of CVE-2022-28556

Exploiting this vulnerability could result in unauthorized access, data manipulation, or denial of service on affected Tenda AC15 devices.

Technical Details of CVE-2022-28556

The following details shed light on the technical aspects of the CVE-2022-28556 vulnerability.

Vulnerability Description

The vulnerability stems from improper handling of user-supplied input, leading to a stack overflow that could be leveraged by threat actors.

Affected Systems and Versions

Tenda AC15 devices running the vulnerable firmware version US_AC15V1.0BR_V15.03.05.20_multi_TDE01.bin are susceptible to CVE-2022-28556.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting and sending specially designed post data to the /goform/setpptpservercfg interface, triggering the stack overflow.

Mitigation and Prevention

To mitigate the risks associated with CVE-2022-28556, users and administrators are advised to take the following steps.

Immediate Steps to Take

Update to the latest firmware version provided by Tenda to patch the vulnerability.
Restrict access to the vulnerable interface and implement network security best practices.

Long-Term Security Practices

Regularly monitor for firmware updates and security advisories from Tenda.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Apply security patches promptly and ensure the timely implementation of firmware updates to address known vulnerabilities and enhance device security.