CVE-2022-40862 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2022-40862, a stack overflow vulnerability found in Tenda AC15 and AC18 routers.

Understanding CVE-2022-40862

CVE-2022-40862 is a security vulnerability identified in Tenda AC15 and AC18 routers, specifically in the function fromNatStaticSetting with the request /goform/NatStaticSetting.

What is CVE-2022-40862?

The vulnerability in Tenda AC15 and AC18 routers allows attackers to trigger a stack overflow by exploiting the function fromNatStaticSetting. This can potentially lead to remote code execution or denial of service attacks.

The Impact of CVE-2022-40862

Attackers can exploit this vulnerability to gain unauthorized access to the affected routers, manipulate network settings, intercept sensitive information, or disrupt network services. It poses a significant security risk to both individuals and organizations using these routers.

Technical Details of CVE-2022-40862

The following technical details outline the specifics of the CVE-2022-40862 vulnerability.

Vulnerability Description

The vulnerability arises from a stack overflow in the function fromNatStaticSetting when processing the request /goform/NatStaticSetting, potentially leading to arbitrary code execution.

Affected Systems and Versions

Tenda AC15 and AC18 routers with firmware version V15.03.05.19 are affected by this vulnerability.

Exploitation Mechanism

Cyber attackers can exploit this vulnerability by sending malicious requests to the fromNatStaticSetting function, triggering the stack overflow and gaining unauthorized access to the router.

Mitigation and Prevention

Protecting systems from CVE-2022-40862 requires immediate action and long-term security practices to mitigate risks effectively.

Immediate Steps to Take

Update the firmware of Tenda AC15 and AC18 routers to the latest version provided by the vendor.
Restrict access to the routers from unauthorized users to minimize the risk of exploitation.

Long-Term Security Practices

Regularly monitor for security updates and patches released by Tenda for the routers.
Implement network segmentation and firewall rules to reduce the attack surface and prevent unauthorized access.

Patching and Updates

Ensure timely installation of firmware updates and security patches released by Tenda to address the CVE-2022-40862 vulnerability and enhance the overall security posture of the routers.