CVE-2023-40892 : Vulnerability Insights and Analysis

A stack overflow vulnerability was discovered in Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn, allowing attackers to exploit the parameters schedStartTime and schedEndTime at /goform/openSchedWifi.

Understanding CVE-2023-40892

This CVE involves a critical stack overflow vulnerability found in Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn, which can be exploited through specific parameters.

What is CVE-2023-40892?

CVE-2023-40892 is a security vulnerability in Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn that enables attackers to trigger a stack overflow by manipulating the schedStartTime and schedEndTime parameters in /goform/openSchedWifi.

The Impact of CVE-2023-40892

This vulnerability allows remote attackers to execute arbitrary code or cause a denial of service, compromising the confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2023-40892

The following details provide more insights into the nature of the vulnerability:

Vulnerability Description

The vulnerability arises due to inadequate input validation of the schedStartTime and schedEndTime parameters, leading to a stack overflow condition that can be abused by attackers.

Affected Systems and Versions

Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn is confirmed to be impacted by this CVE in the specified version.

Exploitation Mechanism

By sending crafted requests containing malicious payloads to the /goform/openSchedWifi endpoint with manipulated schedStartTime and schedEndTime values, threat actors can trigger the stack overflow and potentially gain control over the target system.

Mitigation and Prevention

To address CVE-2023-40892 and enhance the security posture of the affected systems, the following steps are recommended:

Immediate Steps to Take

Disable remote access to the affected device if not required
Apply vendor-supplied patches or updates promptly

Long-Term Security Practices

Implement network segmentation to restrict access
Regularly monitor and audit network traffic for anomalies

Patching and Updates

Ensure that the Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn device is updated with the latest firmware provided by the vendor to mitigate the stack overflow vulnerability.